Hello everybody,

I have configured a PIX 515E v6.1(2) with following 
for NAT/PAT address translation : 

ip address outside x.y.z.2 255.255.255.0
ip address inside 192.168.0.1 255.255.255.0
route outside 0.0.0.0 0.0.0.0 x.y.z.1 1

global (outside) 1 x.y.z.100-x.y.z.253
global (outside) 1 x.y.z.254

nat (inside) 1 0.0.0.0 0.0.0.0 0 0


Inside hosts have necessary permissions for initiating web traffic and 
all the hosts which gets an address from NAT pool(100-253) can browse
the web.
However, clients which are allocated from PAT address(254), can not
browse the web.
These clients can resolve DNS names to IP addresses though. 
when I issue "show xlat" command, PAT addresses are shown as allocated
to
some clients, which I verify that they can't access to web.

I have used Cisco Output interpretter tool. But it didn't give me 
any warning or configuration error. And I think the config is pretty
straight forward. (Which might be the reason of a mistake I can't see)

One friend informed that PIX has a problem in a configuration like this,
where 
outside address is in the same segment with the address used for PAT.
Can someone
confirm this information, and if so, is this behaviour a bug 
or a configuration mistake I am making.

Best regards,

Ufuk Yasibeyli




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