Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
New Member

Cisco routers and PIX firewall on ISDN connection

I have a Cisco 1721 with ISDN connection without fix IP address and sitting behind are PIX 515.

Can anyone show me how to configure the Cisco 1721 routers.

Do i need to set any routing pointing on the firewall or bla bla..

1 REPLY
New Member

Re: Cisco routers and PIX firewall on ISDN connection

Hi

This may not be the solution, but just a suggestion.

I suppose you want internet access via the ISDN. Since the PIX needs a default gateway for 0.0.0.0 traffic you should talk to your ISP and get some public IP adresses for your routers and PIX outside interface..... 2 IP addresses should be enough (255.255.255.252 subnet mask).

You can't set a default gw if you get a random IP address from a DHCP server each time the router dials.

Best regards

Jan Beining

91
Views
0
Helpful
1
Replies
CreatePlease to create content