DNS Not resolving on Clients

DeclanM25

Hi Guys,

I have had a PfSense firewall on esxi for a while now, and every now and then randomly the DNS will stop resolving on client machines. I check Diagnostics -> DNS Lookup and DNS resolves but on my client machines it refuses to resolve a reboot fixes it. I have used 1.1.1.1 and 8.8.8.8 as DNS having my PFsense as my DNS server, i have tried making my DC the DNS server and get PfSense to look there on the DHCP clients but still the same issue.

Any suggestions?

Thanks

Gertjan

@DeclanM25 said in DNS Not resolving on Clients:

Any suggestions?

Execute this :

grep "Restart" /var/log/resolver.log

on the console or SSH acces.

You see many restarts ?
Your mission is : compare logs, and figure out why Unbound is restarted.

A known possibility :
You removed the check from :

Other possible reasons :
Interfaces that become disconnected, and come up again.
pfBlockerNG-devel,
Any other process that restarts, and asks other system processes like unbound to the same.
Etc.

edit : you don't need 1111 and 8888 : out of the box, pfSense works fine.