Bind starts with port 953 being used

When you deploy DNS, you encounter a wonderful problem, always prompt

couldn‘t add command channel 0.0.0.0#953: address in use

There is actually no process on the system that uses port 953. Queried the reason for a bit. Is the problem of Portreserve, close after OK.

The root cause is that you pack a bind rpm and introduce/etc/portreserve/named so that when Portreserve starts, it takes up 53 ports.

When you start using/etc/init.d/named alone, the portrelease is executed to release port 53.

Portrelease named

Bind starts with port 953 being used