In message <201111171600.pahg0ucw011...@scramble.princeton.edu>, Irwin Tillman
writes:
> It appears that named is trying to use ports I've mentioned in
> avoid-v4-udp-ports.
>
> Platform: BIND 9.8.1-P1 on Solaris 10 / SPARC
>
> On some of the ports which BIND might otherwise choose to use,
> I have other daemons running and/or the OS treats the ports
> as privileged. To keep named from trying to use those ports, I have
> in named.conf:
>
> options {
> ...
> # there is no use-v4-udp-ports statement.
> avoid-v4-udp-ports { 1812; 1813; 2049; 4045; };
> # I don't speak v6.
> };
>
> When I upgraded from BIND 9.7.3-P3 to 9.8.1-P1, I began seeing in the log:
>
> named[9185]: dispatch: warning: dispatch 42d950: open_socket(::#2049) ->
> permission denied: continuing
> named[9185]: dispatch: warning: dispatch 42d950: open_socket(::#4045) ->
> permission denied: continuing
>
> ...which suggests to me that BIND is trying to use ports I specified in
> avoid-v4-udp-ports.
>
>
> Checking get_dispsocket() in ./lib/dns/dispatch.c, I see that a difference
> between 9.7.3-P3 and 9.8.1-P1 is that 9.8.1-P1 logs a warning when an attempt
> to open the socket returns ISC_R_NOPERM (perhaps the result of bind()
> returning EACCESS ?),
> while 9.7.3-P3 didn't log the warning. The warning is new.
> When confronted with the error, both versions proceed to pick another port to
> try again.
> So I don't know if the older version was also trying to use these ports and
> encountering
> the same error.
>
> I imagine Solaris might return EACCESS because:
>
> % ndd /dev/udp udp_extra_priv_ports
> 2049
> 4045
>
>
> I don't understand why named would try to use these ports in the first
> place as they appear in avoid-v4-udp-ports.
The "::" in the log message is the IPv6 equivalent of 0.0.0.0 in IPv4.
You machine *is* dual stacked even if it only has IPv6 on loopback.
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--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org
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