Re: [PEN-TEST] Firewalking

Hi,

> What would be the best way to determine what kind of firewall is running on
> a server? Especially one that does not give out any banners.
> TCP-fingerprinting is not possible because there are no obvious open ports.

depends, I'd say. If they pass in (and let out) some ICMP types /
codes, you might be able to fingerprint them on that. I think it
was either Dragos Riu or Clayton Fiske, but one of them wrote an
excellent paper about ICMP fingerprinting.

Cheers, Jan

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