DNS Session helper

[dawidw]

Welcome,

I have to know what affects disabling the DNS session helpers function is in Fortigate. I read on one of forum that when we have some problems with DNS, we should disable this functionality.

[Dave_Hall]

What kind of problems are you having with DNS?  Is this related to DNS issues on the fgt side (e.g. unable to resolve/access the Fortiguard servers), or clients (devices) behind the fgt device?

[Jino_FTNT]

if there is no UDP DNS session helper enabled is, one issue could be the FQDN Wildcard address failed to resolve when using it in Firewall Policies as explained in the below article.

https://community.fortinet.com/t5/FortiGate/Technical-Tip-FQDN-Wildcard-address-is-not-resolved-when...