Sophos Client Firewall: rules for use with Yahoo Messenger

You will need to add some extra rules to Sophos Client Firewall to permit access to Yahoo Messenger.

What to do

Note:

• The 'proxy' rules only need to be added if you are going through a company proxy.
• The program YPAGER.EXE is launched as a hidden process. There are security implications to allowing hidden processes.

To add the rules:

1. Select the Processes tab, and add YPAGER.EXE to the launch hidden processes list.
2. Select the Checksums tab, and add a checksum for YPAGER.EXE.
3. Select the Applications tab, and add the following rules:
   
   YPAGER.EXE
   
   Name = YPAGER.EXE
   Description =
   Type = custom
   
   Rules
   
   • YPager port 5050
     Name = YPager port 5050
     
     Where the protocol is TCP
       and the direction is outbound
       and the remote port is 5050
     Allow it
   • YPager Telnet
     Name = YPager Telnet
     
     Where the protocol is TCP
       and the direction is outbound
       and the remote port is Telnet
     Allow it
   • YPager HTTP
     Name = YPager HTTP
     
     Where the protocol is TCP
       and the direction is outbound
       and the remote port is HTTP
     Allow it
   • YPager FTP
     Name = YPager FTP
     
     Where the protocol is TCP
       and the direction is outbound
       and the remote port is FTP
     Allow it
   • YPager SMTP
     Name = YPager SMTP
     
     Where the protocol is TCP
       and the direction is outbound
       and the remote port is SMTP
     Allow it
     
   • YPager NNTP
     Name = YPager NNTP
     
     Where the protocol is TCP
       and the direction is outbound
       and the remote port is NNTP
     Allow it
   • YPager FTPDATA
     Name = YPager FTPDATA
     
     Where the protocol is TCP
       and the direction is outbound
       and the remote port is FTPDATA
     Allow it
   • YPager Time
     Name = YPager Time
     
     Where the protocol is TCP
       and the direction is Time
       and the remote port is Time
     Allow it
     
   • YPager port 5061
     Name = YPager port 5061
     
     Where the protocol is TCP
       and the direction is outbound
       and the remote port is 5061
     Allow it
   • YPager port 3478
     Name = YPager port 3478
     
     Where the protocol is UDP
       and the direction is outbound
       and the remote port is 3478
     Allow it
   • YPager Proxy
     Name = YPager Proxy
     
     Where the protocol is TCP
       and the direction is outbound
       and the remote address is 10.255.1.100
       and the remote port is PROXY:8080
     Allow it
     
     
   YUPDATER.EXE
   
   Name = YUPDATER.EXE
   Description =
   Type = custom
   
   Rules
   • Yupdater HTTP
     Name = Yupdater HTTP
     
     Where the protocol is TCP
       and the direction is outbound
       and the remote port is HTTP
     Allow it
   • Yupdater Proxy
     Name = Yupdater Proxy
     
     Where the protocol is TCP
       and the direction is outbound
       and the remote address is 10.255.1.100
       and the remote port is PROXY:8080
     Allow it