Date: Tue, 07 Oct 2003 12:52:19 -0700 From: "Kevin Oberman" <oberman@es.net> To: Andi Hechtbauer <anti@spin.de> Cc: freebsd-stable@freebsd.org Subject: Re: good address will not resolve in freebsd (_ in host names) Message-ID: <20031007195220.159465D07@ptavv.es.net> In-Reply-To: Message from Andi Hechtbauer <anti@spin.de> of "Tue, 07 Oct 2003 20:47:05 %2B0200." <86r81o6g2e.fsf@yps.hq.spin.de>
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Here we go again. RFC2181 states a requirement for DNS servers, not resolvers. It states that it is the responsibility of the resolver to decide what is acceptable and what is not. The server just does its best to respond to an query with the data it has (which may be binary, as well as ASCII). The question of whether the FreeBSD resolver should police requests is less clear. The prime concern has been security issues when a program gets back a response that is not allowed under the RFCs. I know some obvious issues with some characters in host names, but none that involve underscore. But they may well exist. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634
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