Reached maximum failures querying DNS server x.x.x.x(internal dns ip)

[laurathaqi]

Dear community, 

I am lately getting the following email error alert in regards the vWSA. 

The Critical message is:

Reached maximum failures querying DNS server x.x.x.x(internal dns ip)

Last message occurred 3 times between Sun Oct 31 10:03:01 2021 and Sun Oct 31 10:03:01 2021.

Product: Cisco S100V Web Security Virtual Appliance

Model: S100V

Version: 12.5.1-043

Timestamp: 31 Oct 2021 10:08:00 +0100

Can someone please guide me on how to solve this problem!? 

Any suggestions would be highly appreciated. 

Thank you,

Laura 

[balaji.bandi]

Is this new setup, or woring one getting that error ? as per the message the DNS server not reachable for the WSA to resolve.

make sure you use the correct interface to contact DNS

you can do the test from command level ping with interface sourcing.

[laurathaqi]

Hi @balaji.bandi 

The interface I am using is the only interface I have, which is used for both, data and management. 

What are the conditions in regards interfaces for this issues matter!? 

Looking forward to hearing from you. 

Best regards,

Laura 

[balaji.bandi]

Is the Logs one time, you still see the logs continuously, if one tme, there may be times your DNS time doing some maintenance and rebooted the servers.

Since WSA have Multiple DNS, it does order of operation try Top to bottom and produced that logs.

If you have deployment all in 1 Interface then there is only Option for the WSA to reach your DNS Servers.