On Mon, Feb 22, 2010 at 06:16:02PM +0200, Aivar Jaakson wrote: > >Number: 6322 > >Category: system > >Synopsis: dig(1) uses always default DNS port 53 > >Confidential: yes > >Severity: serious > >Priority: medium > >Responsible: bugs > >State: open > >Quarter: > >Keywords: > >Date-Required: > >Class: sw-bug > >Submitter-Id: unknown > >Arrival-Date: Mon Feb 22 16:30:01 GMT 2010 > >Closed-Date: > >Last-Modified: > >Originator: > >Release: > >Organization: > >Environment: > System : OpenBSD 4.7 > Details : OpenBSD 4.7-beta (GENERIC) #527: Tue Feb 16 00:07:23 MST > 2010 > > [email protected]:/usr/src/sys/arch/i386/compile/GENERIC > > Architecture: OpenBSD.i386 > Machine : i386 > >Description: > dig ignore -p port# option and send request to port 53 > > >How-To-Repeat: > $ dig @192.168.23.21 -p 5300 foo > > ; <<>> DiG 9.4.2-P2 <<>> @192.168.23.21 -p 5300 foo > ; (1 server found) > ;; global options: printcmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 52887 > ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 > > ;; QUESTION SECTION: > ;foo. IN A > > ;; AUTHORITY SECTION: > . 84924 IN SOA A.ROOT-SERVERS.NET. > NSTLD.VERISIGN-GRS.COM. 2010022200 1800 900 604800 86400 > > ;; Query time: 0 msec > ;; SERVER: 192.168.23.21#53(192.168.23.21) > ;; WHEN: Mon Feb 22 16:24:37 2010 > ;; MSG SIZE rcvd: 96
I think this is unrelated to the resolv.conf issue below. > When you add port to nameserver option in /etc/resolv.conf like > 'nameserver 192.168.23.21:5300', then dig(1) and host(1) gets timeout. > Also when port is :53 The syntax is nameserver [192.168.23.21]:5300 The resolv.conf(5) man page says, "A non-standard port may be specified using [host]:port syntax.". The square brackets are required. It's normal to use them when specifying a port for an IPv6 address. It is potentially confusing though, given that square brackets usually indicate something optional, see the relayd.conf(5) and ftp(1) man pages for example. I've included a documentation patch below that tries to clarify it. Would there be any interest in a patch that modifies the resolv.conf parsing code to accept IPv4:port style address specification without the square brackets? Regards Nathan Index: share/man/man5/resolv.conf.5 =================================================================== RCS file: /cvs/src/share/man/man5/resolv.conf.5,v retrieving revision 1.33 diff -u share/man/man5/resolv.conf.5 --- share/man/man5/resolv.conf.5 20 Nov 2009 14:43:43 -0000 1.33 +++ share/man/man5/resolv.conf.5 9 Apr 2010 09:42:09 -0000 @@ -112,6 +112,12 @@ A non-standard port may be specified using .Ar [host]:port syntax. +When a non-standard port is specified the host +address must be enclosed in square brackets, e.g.: +.Bd -literal -offset indent +nameserver [130.155.160.1]:5353 +nameserver [2001:db8::a00:20ff:fea7:ccea]:5353 +.Ed .Pp Up to .Dv MAXNS
