3Com 3C840 manual 6APPENDIX C Address Translation Tutorial

C-6APPENDIX C: ADDRESS TRANSLATION TUTORIAL

world. You would select the port numbers based on the type of access needed. For example, if you had a local WEB server, you would select the IP address of your server and the port number 80, which is the UDP and TCP port number used to indicate HTML traffic.

Default PAT Default PAT operates like Dynamic PAT except you may specify a default private IP address for all traffic whose port numbers are not in the address translation table. However, this may remove the Firewall. With a default IP address, all traffic initiated on the WAN and not sent to other private IP addresses will go to this IP address. In Dynamic and Static PAT, traffic from the LAN, not the WAN, determines the use of the address translation table.