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Proxy Server
PROXY SERVER
What is a Web Proxy
Proxy Server
A proxy is a host which relays web access requests from clients
Used when clients do not access the web directly
Used for security logging accounting and performance
browser proxy web
What is Web CachingStoring copies of recently accessed web pages
Pages are delivered from the cache when requested again
Browser caches
Proxy caches
Proxy Server
Why CacheShorter response time
Reduced bandwidth requirement
Reduced load on servers
Access control and logging
Proxy Server
Popular Proxy CachesApache proxy
MS proxy server
WinProxy
Squid
Squid is popular because it is powerful configurable and free
Many others
Proxy Server
Squid Setup
SQUID SETUP
Obtaining Squid
Squid Setup
Source code (in C) from wwwsquid-cacheorg
Binary executables
Linux (comes with RedHat and others)
FreeBSD
Windows
Pre-installed in FedoraEnterprise Linux
Basic Settings
Squid Setup
Edit the etcsquidsquidconf file to configure squid
Configuration options
Disk Cache size and location
Authentication
Allowed Hosts
Any other access restrictions (sites content size time of access etc) using ACL
service squid startstoprestart
QUESTIONS
Mail Architecture
Internet
Mail Server
Mail Server
Mail ClientMail Client
Mail Architecture
Mail Architecture
Simple Mail Transfer Protocol (SMTP) is used to transfer mail between Mail Servers over Internet
Post Office Protocol (PoP) and Interactive Mail Access Protocol (IMAP) is used between Client and Mail Server to retrieve mails
The mail server of a domain is identified by the MX record of that domain
Popular Mail Servers
SendmailPostfix
Microsoft Exchange Server
IBM Lotus
Sendmail Setup
SENDMAIL SETUP
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
What is a Web Proxy
Proxy Server
A proxy is a host which relays web access requests from clients
Used when clients do not access the web directly
Used for security logging accounting and performance
browser proxy web
What is Web CachingStoring copies of recently accessed web pages
Pages are delivered from the cache when requested again
Browser caches
Proxy caches
Proxy Server
Why CacheShorter response time
Reduced bandwidth requirement
Reduced load on servers
Access control and logging
Proxy Server
Popular Proxy CachesApache proxy
MS proxy server
WinProxy
Squid
Squid is popular because it is powerful configurable and free
Many others
Proxy Server
Squid Setup
SQUID SETUP
Obtaining Squid
Squid Setup
Source code (in C) from wwwsquid-cacheorg
Binary executables
Linux (comes with RedHat and others)
FreeBSD
Windows
Pre-installed in FedoraEnterprise Linux
Basic Settings
Squid Setup
Edit the etcsquidsquidconf file to configure squid
Configuration options
Disk Cache size and location
Authentication
Allowed Hosts
Any other access restrictions (sites content size time of access etc) using ACL
service squid startstoprestart
QUESTIONS
Mail Architecture
Internet
Mail Server
Mail Server
Mail ClientMail Client
Mail Architecture
Mail Architecture
Simple Mail Transfer Protocol (SMTP) is used to transfer mail between Mail Servers over Internet
Post Office Protocol (PoP) and Interactive Mail Access Protocol (IMAP) is used between Client and Mail Server to retrieve mails
The mail server of a domain is identified by the MX record of that domain
Popular Mail Servers
SendmailPostfix
Microsoft Exchange Server
IBM Lotus
Sendmail Setup
SENDMAIL SETUP
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
What is Web CachingStoring copies of recently accessed web pages
Pages are delivered from the cache when requested again
Browser caches
Proxy caches
Proxy Server
Why CacheShorter response time
Reduced bandwidth requirement
Reduced load on servers
Access control and logging
Proxy Server
Popular Proxy CachesApache proxy
MS proxy server
WinProxy
Squid
Squid is popular because it is powerful configurable and free
Many others
Proxy Server
Squid Setup
SQUID SETUP
Obtaining Squid
Squid Setup
Source code (in C) from wwwsquid-cacheorg
Binary executables
Linux (comes with RedHat and others)
FreeBSD
Windows
Pre-installed in FedoraEnterprise Linux
Basic Settings
Squid Setup
Edit the etcsquidsquidconf file to configure squid
Configuration options
Disk Cache size and location
Authentication
Allowed Hosts
Any other access restrictions (sites content size time of access etc) using ACL
service squid startstoprestart
QUESTIONS
Mail Architecture
Internet
Mail Server
Mail Server
Mail ClientMail Client
Mail Architecture
Mail Architecture
Simple Mail Transfer Protocol (SMTP) is used to transfer mail between Mail Servers over Internet
Post Office Protocol (PoP) and Interactive Mail Access Protocol (IMAP) is used between Client and Mail Server to retrieve mails
The mail server of a domain is identified by the MX record of that domain
Popular Mail Servers
SendmailPostfix
Microsoft Exchange Server
IBM Lotus
Sendmail Setup
SENDMAIL SETUP
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
Why CacheShorter response time
Reduced bandwidth requirement
Reduced load on servers
Access control and logging
Proxy Server
Popular Proxy CachesApache proxy
MS proxy server
WinProxy
Squid
Squid is popular because it is powerful configurable and free
Many others
Proxy Server
Squid Setup
SQUID SETUP
Obtaining Squid
Squid Setup
Source code (in C) from wwwsquid-cacheorg
Binary executables
Linux (comes with RedHat and others)
FreeBSD
Windows
Pre-installed in FedoraEnterprise Linux
Basic Settings
Squid Setup
Edit the etcsquidsquidconf file to configure squid
Configuration options
Disk Cache size and location
Authentication
Allowed Hosts
Any other access restrictions (sites content size time of access etc) using ACL
service squid startstoprestart
QUESTIONS
Mail Architecture
Internet
Mail Server
Mail Server
Mail ClientMail Client
Mail Architecture
Mail Architecture
Simple Mail Transfer Protocol (SMTP) is used to transfer mail between Mail Servers over Internet
Post Office Protocol (PoP) and Interactive Mail Access Protocol (IMAP) is used between Client and Mail Server to retrieve mails
The mail server of a domain is identified by the MX record of that domain
Popular Mail Servers
SendmailPostfix
Microsoft Exchange Server
IBM Lotus
Sendmail Setup
SENDMAIL SETUP
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
Popular Proxy CachesApache proxy
MS proxy server
WinProxy
Squid
Squid is popular because it is powerful configurable and free
Many others
Proxy Server
Squid Setup
SQUID SETUP
Obtaining Squid
Squid Setup
Source code (in C) from wwwsquid-cacheorg
Binary executables
Linux (comes with RedHat and others)
FreeBSD
Windows
Pre-installed in FedoraEnterprise Linux
Basic Settings
Squid Setup
Edit the etcsquidsquidconf file to configure squid
Configuration options
Disk Cache size and location
Authentication
Allowed Hosts
Any other access restrictions (sites content size time of access etc) using ACL
service squid startstoprestart
QUESTIONS
Mail Architecture
Internet
Mail Server
Mail Server
Mail ClientMail Client
Mail Architecture
Mail Architecture
Simple Mail Transfer Protocol (SMTP) is used to transfer mail between Mail Servers over Internet
Post Office Protocol (PoP) and Interactive Mail Access Protocol (IMAP) is used between Client and Mail Server to retrieve mails
The mail server of a domain is identified by the MX record of that domain
Popular Mail Servers
SendmailPostfix
Microsoft Exchange Server
IBM Lotus
Sendmail Setup
SENDMAIL SETUP
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
Squid Setup
SQUID SETUP
Obtaining Squid
Squid Setup
Source code (in C) from wwwsquid-cacheorg
Binary executables
Linux (comes with RedHat and others)
FreeBSD
Windows
Pre-installed in FedoraEnterprise Linux
Basic Settings
Squid Setup
Edit the etcsquidsquidconf file to configure squid
Configuration options
Disk Cache size and location
Authentication
Allowed Hosts
Any other access restrictions (sites content size time of access etc) using ACL
service squid startstoprestart
QUESTIONS
Mail Architecture
Internet
Mail Server
Mail Server
Mail ClientMail Client
Mail Architecture
Mail Architecture
Simple Mail Transfer Protocol (SMTP) is used to transfer mail between Mail Servers over Internet
Post Office Protocol (PoP) and Interactive Mail Access Protocol (IMAP) is used between Client and Mail Server to retrieve mails
The mail server of a domain is identified by the MX record of that domain
Popular Mail Servers
SendmailPostfix
Microsoft Exchange Server
IBM Lotus
Sendmail Setup
SENDMAIL SETUP
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
Obtaining Squid
Squid Setup
Source code (in C) from wwwsquid-cacheorg
Binary executables
Linux (comes with RedHat and others)
FreeBSD
Windows
Pre-installed in FedoraEnterprise Linux
Basic Settings
Squid Setup
Edit the etcsquidsquidconf file to configure squid
Configuration options
Disk Cache size and location
Authentication
Allowed Hosts
Any other access restrictions (sites content size time of access etc) using ACL
service squid startstoprestart
QUESTIONS
Mail Architecture
Internet
Mail Server
Mail Server
Mail ClientMail Client
Mail Architecture
Mail Architecture
Simple Mail Transfer Protocol (SMTP) is used to transfer mail between Mail Servers over Internet
Post Office Protocol (PoP) and Interactive Mail Access Protocol (IMAP) is used between Client and Mail Server to retrieve mails
The mail server of a domain is identified by the MX record of that domain
Popular Mail Servers
SendmailPostfix
Microsoft Exchange Server
IBM Lotus
Sendmail Setup
SENDMAIL SETUP
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
Basic Settings
Squid Setup
Edit the etcsquidsquidconf file to configure squid
Configuration options
Disk Cache size and location
Authentication
Allowed Hosts
Any other access restrictions (sites content size time of access etc) using ACL
service squid startstoprestart
QUESTIONS
Mail Architecture
Internet
Mail Server
Mail Server
Mail ClientMail Client
Mail Architecture
Mail Architecture
Simple Mail Transfer Protocol (SMTP) is used to transfer mail between Mail Servers over Internet
Post Office Protocol (PoP) and Interactive Mail Access Protocol (IMAP) is used between Client and Mail Server to retrieve mails
The mail server of a domain is identified by the MX record of that domain
Popular Mail Servers
SendmailPostfix
Microsoft Exchange Server
IBM Lotus
Sendmail Setup
SENDMAIL SETUP
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
QUESTIONS
Mail Architecture
Internet
Mail Server
Mail Server
Mail ClientMail Client
Mail Architecture
Mail Architecture
Simple Mail Transfer Protocol (SMTP) is used to transfer mail between Mail Servers over Internet
Post Office Protocol (PoP) and Interactive Mail Access Protocol (IMAP) is used between Client and Mail Server to retrieve mails
The mail server of a domain is identified by the MX record of that domain
Popular Mail Servers
SendmailPostfix
Microsoft Exchange Server
IBM Lotus
Sendmail Setup
SENDMAIL SETUP
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
Mail Architecture
Internet
Mail Server
Mail Server
Mail ClientMail Client
Mail Architecture
Mail Architecture
Simple Mail Transfer Protocol (SMTP) is used to transfer mail between Mail Servers over Internet
Post Office Protocol (PoP) and Interactive Mail Access Protocol (IMAP) is used between Client and Mail Server to retrieve mails
The mail server of a domain is identified by the MX record of that domain
Popular Mail Servers
SendmailPostfix
Microsoft Exchange Server
IBM Lotus
Sendmail Setup
SENDMAIL SETUP
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
Mail Architecture
Internet
Mail Server
Mail Server
Mail ClientMail Client
Mail Architecture
Mail Architecture
Simple Mail Transfer Protocol (SMTP) is used to transfer mail between Mail Servers over Internet
Post Office Protocol (PoP) and Interactive Mail Access Protocol (IMAP) is used between Client and Mail Server to retrieve mails
The mail server of a domain is identified by the MX record of that domain
Popular Mail Servers
SendmailPostfix
Microsoft Exchange Server
IBM Lotus
Sendmail Setup
SENDMAIL SETUP
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
Mail Architecture
Mail Architecture
Simple Mail Transfer Protocol (SMTP) is used to transfer mail between Mail Servers over Internet
Post Office Protocol (PoP) and Interactive Mail Access Protocol (IMAP) is used between Client and Mail Server to retrieve mails
The mail server of a domain is identified by the MX record of that domain
Popular Mail Servers
SendmailPostfix
Microsoft Exchange Server
IBM Lotus
Sendmail Setup
SENDMAIL SETUP
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
Mail Architecture
Simple Mail Transfer Protocol (SMTP) is used to transfer mail between Mail Servers over Internet
Post Office Protocol (PoP) and Interactive Mail Access Protocol (IMAP) is used between Client and Mail Server to retrieve mails
The mail server of a domain is identified by the MX record of that domain
Popular Mail Servers
SendmailPostfix
Microsoft Exchange Server
IBM Lotus
Sendmail Setup
SENDMAIL SETUP
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
Sendmail Setup
SENDMAIL SETUP
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
Sendmail ConfigurationMail Server Setup
Daemon sendmailConfiguration File etcmailsendmailmcEdit the following lines
LOCAL_DOMAIN(`localhostlocaldomain)dnl(Replace localhostlocaldomain by the domain name for which the mail server is being configured)DAEMON_OPTIONS(`Port=smtpAddr=127001 Name=MTA)dnl(comment this line by adding dnl at the start of the line)
dnl MASQUERADE_AS(`mydomaincom)dnl (remove dnl amp replace mydomaincom by the domain name)
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
Sendmail Configuration
Sendmail Setup
Add the range of IP addresses of your network in access file
(eg 17231 Relay)
Run ldquomake ndashC etcmailrdquo command to compile sendmailmc and generate sendmailcf file
Restart sendmail and watch for errors
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
PoP amp IMAP Server
Sendmail Setup
PoP3 amp IMAP Server can be started using dovecot server (service dovecot start)
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
VoIP
VoIP APPLICATIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
What is VoIPThe packetization and transport of classic public switched telephone system audio over an IP networkThe analog audio stream is encoded in a digital format with possible compression and encapsulated in IP for transport over your LANWAN or the public InternetModes of Operation- PC to PC- PC to Telephone- Telephone to PC- Telephone to Telephone
VoIP
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
VoIP ProtocolsH323 (ITU-T)
SIP (IETF)
VoIP
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
H323 Architecture
VoIP
1048708 H323 Terminal1048708 Gateway1048708 Gatekeeper1048708 Multipoint Control Units (MCU)
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
SIPSIP is a text-based protocol similar to HTTP and SMTP for initiating interactive communication sessions between users
SIP is an application-layer control (signaling) protocol for creating modifying and terminating sessions with one or more participants
SIP can be used with different transport protocols it doesnt even require reliable transport protocols
A simple SIP client can be implemented using only UDP
VoIP
SIP Architecture
VoIP
QUESTIONS
SIP Architecture
VoIP
QUESTIONS
QUESTIONS
