Re: [squid-users] Squid not failing over to secondary DNS host

2017-10-16 Thread Amos Jeffries
On 16/10/17 20:24, Geoffrey wrote: Hello Amos Do you have ICMP and ICMPv6 working in your network? If not that is probably part of the issue. AND Are you using DROP rules or policies in your firewalls? that can also lead to missing packets like this. You may be getting warm. I have IPv6

Re: [squid-users] Squid not failing over to secondary DNS host

2017-10-14 Thread Amos Jeffries
On 12/10/17 18:44, Geoffrey wrote: Thanks for your reply Amos. I just realised I left out some info in the original email that was pertinent. :) How are you determining that exactly? squid logs? DNS logs? firewall counters? packet traces? Quite simply by trial and error and monitoring the r

Re: [squid-users] Squid not failing over to secondary DNS host

2017-10-11 Thread Geoffrey
Thanks for your reply Amos. I just realised I left out some info in the original email that was pertinent. :) >How are you determining that exactly? > squid logs? DNS logs? firewall counters? packet traces? Quite simply by trial and error and monitoring the results of taking the 2 DNS/DCs offli

Re: [squid-users] Squid not failing over to secondary DNS host

2017-10-11 Thread Amos Jeffries
On 12/10/17 15:04, Geoffrey wrote: Hello folks, I am finding that Squid will not use the secondary DNS if the first one is taken offline. In this case the primary DNS is not able to respond because I have taken it offline, and therefore the secondary DNS should be queried by squid, but is not.

[squid-users] Squid not failing over to secondary DNS host

2017-10-11 Thread Geoffrey
Hello folks, I am finding that Squid will not use the secondary DNS if the first one is taken offline. In this case the primary DNS is not able to respond because I have taken it offline, and therefore the secondary DNS should be queried by squid, but is not. I have 2 Windows recursive DNS server