is this network config possible?

[ciscostudent561]

First thanks in advance everyone.

Here's my question(s)

I've attached a diagram of my network and was wondering if it was possible (maybe I am wording incorrectly) to "bridge" my internet connection from my router. I don't want my router to handle NAT, but I only have one IP address coming in for my ISP.

I would like for my PIX to continue to manage my NAT connections, and I want to avoid using a double NAT.

Please advise, thank you

[Jennifer Halim]

Your topology diagram doesn't seem to be uploaded to the forum  correctly. There seems to be problem uploading file recently:  current.JPG (41.9 K) QUEUED"

However, base on your question, yes, it is possible for the ADSL router/modem to be configured in bridge mode.

Not sure which router you are using, however, here is the Cisco router configuration guide for bridge mode config:

http://www.cisco.com/en/US/tech/tk175/tk15/technologies_configuration_example09186a008071a807.shtml

And here is the configuration for PPPoE client on PIX:

http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_configuration_example09186a00801055dd.shtml

Hope that helps.

[ciscostudent561]

thank you for the quick reply

My original config in the diagram that won't show was this:

DSL Modem > 3640 router (connected via ethernet not WAN)>  PIX506  > Switch

I think I am changing to this

DSL Modem > PIX506 > 3640 Router > Switch

The goal was for the router to simply bridge the internet connection to the PIX so that I could continue to use the PIX for NAT.

However I decided to continue my current set up and connect my PIX to the modem, let it do the NAT... Then have my router behind my PIX, as its main purpose is to for Radius authentication and allowing my VLANs to speak to each other.

Easy to draft... a pain to configure. wish me luck!

Thanks again for your insight Jennifer

[Jennifer Halim]

Cheers, should be no problem with the setup that you are proposing. All the best.. and hopefully you get it up and running in no time.