Re: BIND slave server ignoring responses to all UDP-based SOA queries (zone refresh) for hours at a time

2015-07-13 Thread Irwin Tillman
At 07 Jul 2015 13:47:45 +0100, Cathy Almond cat...@isc.org wrote: What can happen (and this is really really subtle) is that if there are some source ports that named could randomly select, but where intermediate firewalls or filters are just dropping, either the SOA refresh queries, or the

Re: BIND slave server ignoring responses to all UDP-based SOA queries (zone refresh) for hours at a time

2015-07-07 Thread Cathy Almond
What can happen (and this is really really subtle) is that if there are some source ports that named could randomly select, but where intermediate firewalls or filters are just dropping, either the SOA refresh queries, or the responses, then named can 'get stuck' on using and re-using the same

BIND slave server ignoring responses to all UDP-based SOA queries (zone refresh) for hours at a time

2015-06-04 Thread Irwin Tillman
Apologies in advance for this lengthy description. Since making I made a configuration change a few weeks ago, every 1-3 days, my BIND 9.9.7 server experiences several hours of retry/timeout failures while performing UDP-based SOA serial number queries (zone refresh). My server acts like it