We got 2 CentOS servers on same datacenter. they both have websites using same mysql server.
Most of the websites uses same source codes located on a.b.c.162. There is a shortcut to a.b.c.162 on a.b.c.164 placed on same location as a.b.c.162. So websites are reaching source codes through shoutcut between servers if website is located on a.b.c.164.
I have one of the setup as my domain controller, for let's say domain.local
Obviously when I installed this it added the DNS server and this was as expected. I then proceeded in joining my other servers to the domain and all went well, I also set the DNS to only respond to requests coming in on the internal network's NIC.
We are having two DNS servers working as master and slave in our DMZ network subnet.DMZ network consist other servers also, but only the DNS servers intermittently becomes unreachable (no ping response) from different subnets whereas the internal communication (within subnet) happens at that time.
From the DNS server we are unable to ping gateway ip also when the issue arises.We tried changi