Date: Mon, 3 Nov 2003 15:40:38 +0100 From: Andreas Klemm <andreas@FreeBSD.org> To: freebsd-current@FreeBSD.org Subject: Re: suddenly bind and access to NNTP server (localhost) doesn't work Message-ID: <20031103144038.GB1608@titan.klemm.apsfilter.org> In-Reply-To: <20031103141849.GC35045@procyon.firepipe.net> References: <20031103124706.GA1434@titan.klemm.apsfilter.org> <20031103141849.GC35045@procyon.firepipe.net>
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On Mon, Nov 03, 2003 at 06:18:49AM -0800, Will Andrews wrote: > On Mon, Nov 03, 2003 at 01:47:06PM +0100, Andreas Klemm wrote: > > Since about 2 days I can't make dns queries via local nameserver. > > To get dns requests I need to add my forwarders in /etc/resolv.conf. > > I've noticed this before (on FreeBSD 4.8), then realized my ISP > was blocking 53/TCP. I found the culprit, for my eyes its a problem with ipfw. Look here: on titan the rule 100 doesn't work anymore for (for me) unknown reason: 00100 0 0 allow ip from any to any via lo0 00200 3 180 deny ip from any to 127.0.0.0/8 00300 0 0 deny ip from 127.0.0.0/8 to any 65000 133 75074 allow ip from any to any 65535 21787 2611732 deny ip from any to any FreeBSD titan.klemm.apsfilter.org 5.1-CURRENT FreeBSD 5.1-CURRENT #0: Sun Oct 19 16:33:53 CEST 2003 root@titan.klemm.apsfilter.org:/usr/src/sys/i386/compile/TITAN i386 andreas@titan[ttyp3]{1004} ~ ll /sbin/ipfw -r-xr-xr-x 1 root wheel 482184 2 Nov 21:26 /sbin/ipfw On my Laptop aklemm the rule 100 (firewall type "open") works: 00100 206 20504 allow ip from any to any via lo0 00200 0 0 deny ip from any to 127.0.0.0/8 00300 0 0 deny ip from 127.0.0.0/8 to any 65000 9498 3688895 allow ip from any to any 65535 0 0 deny ip from any to any root@aklemm[ttyp2]{204} ~ ll /sbin/ipfw -r-xr-xr-x 1 root wheel 482184 2 Nov 23:07 /sbin/ipfw root@aklemm[ttyp2]{205} ~ uname -a FreeBSD aklemm.klemm.apsfilter.org 5.1-CURRENT FreeBSD 5.1-CURRENT #0: Sun Nov 2 23:55:37 CET 2003 root@aklemm.klemm.apsfilter.org:/usr/src/sys/i386/compile/AKLEMM i386 Because rule 100 isn't working for unknown reason on titan, I get DNS and connect problem with a local NNTP server, since the traffic pattern "from any to any via lo0" is needed, but doesn't work. But I really have no idea, whats that causing... Andreas /// -- Andreas Klemm - Powered by FreeBSD 5.1-CURRENT Need a magic printfilter today ? -> http://www.apsfilter.org/
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