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Re: Feature Needed: Passthrough for destanation domain name (CP): msg#00000

security.firewalls.m0n0wall.devel

Subject: Re: Feature Needed: Passthrough for destanation domain name (CP)

Alex M wrote:
Also, set my company's IP (that's for sure has only one IP) and when I typed
the name it didn't allow to go through. There is a definet need to add
Domain Pass-through!



Do you use m0n0 as your DNS forwarder? You probably couldn't get through to the web site because the unauthenticated client was not allowed to contact the DNS server, but that's just a guess.

Adding the feature you describe is probably not as easy as it sounds. the packet filter does not do DNS lookups, so you would have to expand the code so that ANY request from an unauthenticated client first gets checked against the allowed hostnames, THEN the firewall would have to resolve the hostname and dynamically set a rule to allow the result of the DNS lookup, since IPs change (dynamic, round robin, you name it). After that, for security reasons, the dynamically generated rule would probably have to be deleted, so that a future DNS change does not allow the wrong traffic out and the ruleset grows too much. Not a cut-and-dry thing.

Sven


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