Do I need other settings like that modified? There are other settings in the gateway that caught my eye as well cascading router for one. Has anyone successfully done this (firewall behind an ISP provided gateway)? I feel like it must be a fairly common SOHO scenario.Īssuming I am going down the correct path, do I need to enter the WAN address of the gateway as the ip address and mask for the Eth0/0 interface? I assume I need to enter something, as IP Passthrough with DHCP-Fixed didn't work (and I set the ASA interface to DHCP).
There aren't a lot of options for manual IP passthrough - really I can only add the MAC address of the device being used (so I entered the MAC address of Eth0/0 on the ASA) But.Eth0/0 on the ASA remains down/down.Īm I going about accomplishing this correctly/cleanly? I readily admit to being in the dark on this. I decided to use manual mode, as I felt that would make NAT for the DMZ easy. I found some setting called "IP Passthrough" that seemed like it would do the job:
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Ip address Īnd add a default route to send all traffic out to the gateway via that interface.īut, I am not sure how to setup the AT&T gateway to allow this. I was planning on setting up something like this on the ASA: My main issue thus far is when attempting to connect the ASA to the gateway (an Arris BGW210-700, branded AT&T and running AT&T software), I am not sure how to do this. They have a bunch of mid-2000's Cisco gear lying around, and I grabbed an ASA 5510 to make this work.
Everything else can just do whatever - an internet connection is all thats needed. They have a couple devices they would like in a DMZ - a rather old server (that basically must have a static IP reservation) and a modern machine running their proprietary application. They just bought and had installed an AT&T business internet connection. I am attempting to setup a temporary network for a company in transition that is moving into a new building.
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