PIX behind a DSL Router and PAT'ing

By taher.afridi ·
I have the following setup:

(ISP)-----(DSL router)------(PIX)-----(ISA)--

-The ISP provides a DHCP IP to the DSL on 1.
-Ports 2 and e0 have a local IP (192.168.3.x and y)
-Ports e1 of PIX and the in of the ISA server are also on a network of IP's 155.160.0.x and y
-Port out of the ISA is on the LAN network segment.

PAT is configured on the PIX.
Ping requests from the PIX to the Internet work
Pings from th PIX to the ISA server also work
Pings from the ISA to e1 of PIX also work.

There's no Internet connectivity from the ISA (or the LAN network).

I can't figure out the right NAT setting for such a setup on the PIX Firewall.

Any suggestions and help would be highly appreciated.
I hope i was able to clearly and simply put the problem.

Thanku, Afridi.

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