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TOPIC: pix506e - fixup protocol dns impacts ...

pix506e - fixup protocol dns impacts ... 10 years 9 months ago #13488

  • vblondel
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Hello everybody.

I currently learn to configure my cisco pix 506e firewall. I am now precisely experimenting "fixup" statements and I just remarked that when I activate "fixup protocol dns maximum-length 512" I cannot make any telnet to any protocol on my cisco pix from wan side.

For example, without any "fixup protocol dns" I can well make "telnet 1.2.3.4 80" and type basic HTTP statements like "GET / HTTP/1.0" but if activate "fixup protocol dns" I cannot make anymore telnet to port 80, 25 ...

Can somebody explain me if this is a normal behaviour and why ?

Many thanks for your comprehension.

Regards
Vincent
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