Dynamic ports in BIND 9.1.3?

[Mark_Andrews at isc.org]

> Hi!
> 
> According to for instance "DNS and BIND", BIND 8 and 9 name servers should use 
> dynamic ports by default (and not port 53)when contacting other name servers. I
>  am a bit confused here since I am running a BIND 9.1.3 name server and it seem
> s to always use port 53 when contacting other name servers. Have I got somethin
> g wrong here?
> 
> Regards,
> Johan
> 
> >From DNS & BIND 4:th ed. page 329:
> 
> BIND 4 name servers always send queries from port 53, the well-known port for D
> NS servers, to port 53. Resolvers, on the other hand, usually send queries from
>  high-numbered ports (above 1023) to port 53. Though name servers clearly have 
> to send their queries to the DNS port on a remote host, there's no reason they 
> have to send the queries from the DNS port. And, wouldn't you know it, BIND 8 a
> nd 9 name servers don't send queries from port 53 by default. Instead, they sen
> d queries from high-numbered ports, the same as resolvers do. 
 
	Upgrade.  9.1.3 is well passed its use by date.

1222.   [bug]           Specifying 'port *' did not always result in a system
                        selected (non-reserved) port being used. [RT #2537]

	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