Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations Mike Lewis on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!

NAT through ISP assigned dynamic IP?

Status
Not open for further replies.

ktuimala

MIS
Jan 4, 2008
4
US
I am new to Cisco and the 871W is my first Cisco router. I am attempting to set up NAT rules for outside users to reach internal resources. However, it doesn't seem all that straight forward to me. As far as I can tell it wants me to use my external IP address, which I can, but it will change. How do I setup Outside to Inside NAT rules that will work when my ISP provided IP Address changes? Any help would be appreciated.
 
Static nat statements...
Let's say the outgoing interface is dialer0, and you have an FTP server on the inside, at 192.168.1.4
router>en
router#conf t
router(config)#ip nat inside source static tcp 192.168.1.4 21 int di0 21

Post a config, and what you want to do, if you have any more questions.

Burt
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top