Dynamic ports in BIND 9.1.3?
Mark_Andrews at isc.org
Mark_Andrews at isc.org
Fri Feb 7 11:51:15 UTC 2003
> 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
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