Date: Wed, 7 May 2008 16:56:54 -0400 From: "Kevin K" <kkutzko@teksavvy.com> To: "'Ansar Mohammed'" <ansarm@gmail.com>, "'Jille'" <jille@quis.cx> Cc: freebsd-pf@freebsd.org Subject: RE: UDP weirdness Message-ID: <006c01c8b084$e1d82670$a5887350$@com> In-Reply-To: <00a401c8b084$87da9540$978fbfc0$@com> References: <004f01c8b068$89c89350$9d59b9f0$@com> <005101c8b06b$5f0743c0$1d15cb40$@com> <008b01c8b081$c74692e0$55d3b8a0$@com> <482215F4.1080806@quis.cx> <00a401c8b084$87da9540$978fbfc0$@com>
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You cannot track state of stateless protocols such as UDP. > -----Original Message----- > From: Ansar Mohammed [mailto:ansarm@gmail.com] > Sent: Wednesday, May 07, 2008 4:54 PM > To: 'Jille' > Cc: 'Kevin K'; freebsd-pf@freebsd.org > Subject: RE: UDP weirdness > > But I thought pf would be tracking state? > Isnt that the whole point of statefull firewalls? > > > > > -----Original Message----- > > From: Jille [mailto:jille@quis.cx] > > Sent: May 7, 2008 4:50 PM > > To: Ansar Mohammed > > Cc: 'Kevin K'; freebsd-pf@freebsd.org > > Subject: Re: UDP weirdness > > > > > > > > Ansar Mohammed schreef: > > > Ok, so adding the line as you suggested worked. > > > Thanks Kevin. > > > > > > But why do I need to have both entries in for > > > > > > pass in proto udp from any to any port 53 > > > pass out proto udp from any to any port 53 > > > > > > what makes UDP so special? > > UDP is stateless, > > With TCP you've got an connection (identified by: local host:port and > > remote host:port) > > With UDP, well, you just trow the packages over the line, and hope > the > > is (still) someone on the other end. > > > > So the is (almost) no way to detect whether packets are responses to > > eachother > > > > -- Jille
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