cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
350
Views
0
Helpful
2
Replies

Cable Modem + Router + Pix

antinea
Beginner
Beginner

Dear All,

Here's my problem:

I have a cable ADSL modem supplied by my ISP.

The ethernet cable is connected to ethernet 0 in my cisco 2621.

Router Ethernet 1 is directly connected to ethernet 0 (outside) of my pix 506E

Pix's ethernet 1 (inside) is connected to my backbone switch 3550 over a dedicated port VLAN

The pix is configured with nat.

My ISP gave me 6 external internet addresses. (/48)

One is given to the cable modem (configured remotely by the ISP)

one is given to the (external) ethernet 0 of the router

one is given to outside of the pix.

The problem is how to configure the router's interfaces since I don't want to configure nat between its interfaces and the (internal) ethernet 1 connected to the pix should be an internet address like ethernet 0.

Any solution is highly appreciated.

Thank you in advance,

Samir

2 Replies 2

syghafoor
Beginner
Beginner

Hi Samir,

I am little unclear about the whole setup. Can you please elaborate with respect to the ip addresses? Your ISP has given you 6 ip addresses one is assigned to the e0 of the router. What is the ip address you are using for e1 of the router?

for e.g

modem----------router-------------pix----switch

.1 .2 ? ? ?

Regards,

Syed

Hello Syed,

First thank you for your reply.

Here's what's working now:

modem---------------------router-----------------------------switch(3550)-------------LAN

193.95.16.17 16.18 192.168.22.2 22.1 192.168.21.1 21.0

What I want to do:

modem---------------------router----------------------pix-------------switch

Please what ip addresses should I configure on ethernet interfaces of all devices taking the following in mind:

- router: Cisco 2621 12.2 with NM-8AM module (for dial in access)

- pix: 506E (6.22 image and 2.1 PDM)

- switch: 3550 with EI

- LAN: this is my DMZ 192.168.21.0 (from DMZ to LAN there's ISA server - working fine)

- Internet IP @: 193.95.16.16/29

- I want to publish my pix internet address for VPN access

- Also I want to publish a web server which is in the DMZ (LAN here)

IP @ Recap:

ADSL Modem (to internet) : 193.95.16.17/29

Router :

FastEth0 (to ADSL modem) 193.95.16.18/29

FastEth1 (to switch) 192.168.22.2/24

Switch:

Multiple VLANS

DMZ VLAN: 192.168.22.1/24 (connected to router) and default route

Many thanks in advance.

Samir

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Recognize Your Peers