Visitor III

Question

DNS High Latency issue on 7.4.0

Forum|Forum|2 years ago
January 18, 2024
8 replies
4158 views

Hi All,

Just want a quick help on our issue with High DNS Issue.

I have seen this article below.

https://docs.fortinet.com/document/fortigate/7.4.0/administration-guide/126629

And I am just wondering would it be service affecting if you would run commands like the following:

diagnose test application dnsproxy

1. Clear DNS cache

2. Dump DNS Setting

3. Reload FQDN

4. DNS debug bit mask

5. DNS debug obj mem

6. Restart dnsproxy worker

ETC.

REGARDS

NICKO

@All

AEK

SuperUser

Hello

As per my experience this latency value is not to take in consideration as long as your DNS server responds to queries in time.

AEK

Hong_FTNT

Staff & Editor

Hi @imuscleupcarat,

Are those DNS servers in the same subnet as FortiGate? Which protocol are you using? Please provide the output of this command "show full system dns" if possible.

Regards,

imuscleupcaratAuthor

Visitor III

Hi They are using UDP port 53,

Can you confirm if the commands on my post are service affecting when run?

mle2802

Staff

Hi @imuscleupcarat,

Please refer to this document for more detail https://community.fortinet.com/t5/FortiGate/Technical-Note-FortiGate-Troubleshooting-DNS-commands/ta-p/192617.

mle2802

Staff

Also, for this high latency, what is the protocol you are using and have you tried different DNS server?

imuscleupcaratAuthor

Visitor III

They are using UDP port 53

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