User`s manual

DCM-604 Cable Modem EMTA Gateway User’s Manual
17
5.4.4 Forwarding
For communications between LAN and WAN, the DCM-604 normally only
allows you to originate an IP connection with a PC on the WAN; it will ignore
attempts of the WAN PC to originate a connection onto your PC. This protects
you from malicious attacks from outsiders. However, sometimes you may wish
for anyone outside to be able to originate a connection to a particular PC on
your LAN if the destination port (application) matches one you specify.
The Forwarding page allows you to specify up to 10 rules.
Using the Port Forwarding page, you can provide local services (web servers,
FTP servers, mail servers, etc) for people on the Internet or play Internet
games. A table of commonly used port numbers is also provided.
5.4.5 Port Triggers
The Port Triggers page allows you to configure dynamic triggers to specific
devices on the LAN. This allows for special applications that require specific
port numbers with bi-directional traffic to function properly. Applications such
as video conferencing, voice, gaming, and some messaging program features
may require these special settings.