System information

Appendix B Configuring an Internet Router 155
Manually Configuring Port Mapping on an Internet Router
You can manually configure port mapping on most Internet routers by using their
configuration software. Usually the configuration software consists of several
webpages. Using Safari, you go to the webpage with settings for port mapping or port
forwarding. In some cases, you can select standard services such as web or VPN and
specify that each be mapped to your server’s IP address. In other cases, you must enter
port numbers for services and enter your server’s IP address for each one.
The following table lists services and the corresponding ports for which you might
want to set up port mapping or forwarding. Some Internet routers may ask you to
specify TCP or UDP for each port, while other routers don’t. For specific information
about how to configure port forwarding on your Internet router, see its
documentation.
Service Port TCP or UDP
iChat service
iChat server-to-server
iChat file transfer proxy
5269
7777
TCP
TCP
Mail service
SMTP 25 TCP
Web service
HTTP 80 TCP
VPN service
ISAKMP/IKE
L2TP
PPTP
IKE NAT Traversal
500
17 0
1723
4500
UDP
UDP
TCP
UDP