Problems configuring firewall

Unanswered Question
Oct 4th, 2007

Hi,

I have a 1721 cisco router with the ethernet port and a lan wic.

The router has 192.168.156.252 ip configured. We have configured with 192.168.156.25 ip address a router connected by my isp.This router has been configured with this ip, we can not change it or enter to administer the software.

I tried to connect a lan wire from this router(teldat) to the 1721 ethenet wic port and use the IOS firewall to filter certain ports.. protocols and more...

Using SDM 2.4.1 I tried to configure the firewall but the wizard says that they have the same lan ip and it is impossible.

what can I do?

best regards

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Loading.
whisperwind Fri, 10/05/2007 - 10:26

Either subnet the two interfaces so they are logically different or change one of them to a new subnet.

whisperwind Sun, 10/07/2007 - 05:57

I will try, put a different network on the interface so they do not overlap, you can either use subnetting or something like

10.0.0.1 255.255.255.0

I recommend you google subnetting and read up on it.

Actions

This Discussion