BIND (named) is listening on some high-numbered ports. What is going on?
BIND uses a random high-numbered port for outgoing queries. Recent versions of it choose a new, random UDP port for each query. This may cause problems for some network configurations, especially if a firewall blocks incoming UDP packets on particular ports. If you want to get past that firewall, you can try the avoid-v4-udp-ports and avoid-v6-udp-ports options to avoid selecting random port numbers within a blocked range.
