Problem Accessing some Web Pages behind PAT on PIX
We are experiencing some problems lately with a small number of webpages in the internet while accessing them behind a PAT address (many to one). The same web pages work fine if accessed behind a NAT address (one-to-one Translation).
We are using PIX 535 version 8.0(4), while we also tried it by "downgrading" to 7.2(4).
At the begining we suspected problem with DNS, but doesn'e make much sense since, the pages work well if behind NAT. Another assuption is to do with ICMP error that some web pages send back to source, but not handled if behind PAT by PIX, but we couldn't find anything in the capture...
The NAT/PAT we are using is.....
nat (USERS) 10 10.10.0.0 255.255.0.0 global (OUTSIDE) 10 X.X.X.0-X.X.X.X.61 netmask 255.255.255.224 global (OUTSIDE) 10 X.X.X.X.62 netmask 255.255.255.224 global (OUTSIDE) 10 X.X.X.X.63 netmask 255.255.255.224
Re: Problem Accessing some Web Pages behind PAT on PIX
Can you remove the http inspections?
Does it help these pages?
It could be that the pages embed some port info inside the http data and the ASA does not overwrite that payload, so it all works when the port is not changed (statics) byt the ASA and the payload does not need to be overwritten. Just a thought. If that is the case I don't think you can do anything rather than 1-1 nat (doubt if that is a viable solution).
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