SMC Networks SMC7904WBRA - Manual (Page 85)

A
DVANCED
S
ETUP
4-41
Note: The WAN interface should have a fixed IP address to best utilize
this function. See “ATM Interface” on page 4-24 for using the
same domain name even though your IP address changes each
time you log into the ISP.
Special Application
Some applications require multiple connections, such as Internet gaming,
video-conferencing, and Internet telephony. These applications may not
work when Network Address Translation (NAT) is enabled. If you need to
run applications that require multiple connections, use these pages to
specify the additional public ports to be opened for each application.