Dig Hangs during axfr request when not on localhost.

[Pete Fry]

> 
> We have had the same problem on CentOS 7 servers after a recent bind yum
> update. For the moment we have downgraded BIND back to
> bind-9.9.4-73.el7_6.x86_64 and the zone transfers are working again.
> 

John

Many thanks for this can't believe we didn't try this first!

thanks again

Pete