01-04-2013
As for the DNS question:
The bind manual lists this:
Quote:
listen-on
-> listen-on [ port ip_port ] { address_match_list };
listen-on defines the port and IP address(es) on which BIND will listen for incoming queries. The default is port 53 on all server interfaces. Multiple listen-on statements are allowed. This statement may only be used in a global options clause.
I'd imagine that you would add this to your named.conf file and restart.
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LISTEN(2) System Calls Manual LISTEN(2)
NAME
listen - listen for connections on a socket
SYNOPSIS
listen(s, backlog)
int s, backlog;
DESCRIPTION
To accept connections, a socket is first created with socket(2), a willingness to accept incoming connections and a queue limit for incom-
ing connections are specified with listen(2), and then the connections are accepted with accept(2). The listen call applies only to sock-
ets of type SOCK_STREAM or SOCK_SEQPACKET.
The backlog parameter defines the maximum length the queue of pending connections may grow to. If a connection request arrives with the
queue full the client may receive an error with an indication of ECONNREFUSED, or, if the underlying protocol supports retransmission, the
request may be ignored so that retries may succeed.
RETURN VALUE
A 0 return value indicates success; -1 indicates an error.
ERRORS
The call fails if:
[EBADF] The argument s is not a valid descriptor.
[ENOTSOCK] The argument s is not a socket.
[EOPNOTSUPP] The socket is not of a type that supports the operation listen.
SEE ALSO
accept(2), connect(2), socket(2)
BUGS
The backlog is currently limited (silently) to 5.
4.2 Berkeley Distribution May 14, 1986 LISTEN(2)