The default query-source uses which IP address?

[Mark_Andrews at isc.org]

> 
> Hello,
> 
> Could someone please answer this question?
> 
> The bind is set up as a caching-only server and listens to
> 127.0.0.1:53.
> 
> This system has two network interfaces, eth0 and eth1. The
> /etc/named.conf doesn't define query-source. "man named.conf" says
> that INADDR_ANY is used if query-source is not defined, but it doesn't
> mention which IP is used for a multi-homed system. I know I can use
> query-source to be sure. But I would like to know which IP is used
> when the bind makes a query without query-source defined.
> 
> Here is the environment in question.
> 
> OS: RedHat Linux 7.2 (kernel 2.4.7-10)
> Bind: bind-9.2.1-1.7x.2
> Network Interfaces:
> eth0 => 192.168.0.11
> eth1 => 199.xxx.xxx.xxx
> Routing Table:
> Destination     Gateway         Genmask         Flags Metric Ref   
> Use Iface
> 192.168.0.0     0.0.0.0         255.255.255.0   U     0      0       
> 0 eth0
> 199.xxx.xxx.xxx 0.0.0.0         255.255.255.0   U     0      0       
> 0 eth1
> 127.0.0.0       0.0.0.0         255.0.0.0       U     0      0       
> 0 lo
> 0.0.0.0         199.xxx.xxx.1   0.0.0.0         UG    0      0       
> 0 eth1
> 
> 
> Thanks very much,
> 
	Which ever address is appropriate for the network named is talking
	to.

	If it is talking to 192.168.0/24 then it will use 192.168.0.11.
	If it is talking to 127/8 then it will use 127.0.0.1.
	If it is talking else where it will use 199.xxx.xxx.xxx.

	Mark
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org