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BsuarezQTStools
New Contributor

DNS unreachable on branch fortigates after accidental DNS server removal

Our set up was working before.

main branch - 2 DNS servers - Main Fortigate

then over the internet to our other branch Fortigates

with the accidental removal of the DNS server, then restoring from back up the server is back and connected back in our network. No settings were changed on the branch Fortigates and everything looks good on the main Fortigate. unfortunately the branch Fortigates all say our specific DNS servers are unreachable.

Can someone point me in the right direction? 

6 REPLIES 6
dingjerry_FTNT

Hi @BsuarezQTStools ,

 

"the branch Fortigates all say our specific DNS servers are unreachable"

 

Are the DNS queries from the branch FGT itself or branch users?

Regards,

Jerry
BsuarezQTStools
New Contributor

 believe the branch FGT.

dingjerry_FTNT

Hi @BsuarezQTStools ,

 

Are the DNS queries sent to DNS servers over the Internet to the Main FGT?

 

Where are the DNS servers?  The Main FGT acts as DNS servers or the DNS servers are on the Main Branch network?

 

You have to provide all the info.

Regards,

Jerry
BsuarezQTStools

sorry, thank you for your assistance. I contacted my predecessor and he explained and walked me through the process of what is going on. I am good now. 

dingjerry_FTNT

Hi @BsuarezQTStools ,

 

Could you please share what's going on? It may help someone in the future.

Regards,

Jerry
funkylicious
SuperUser
SuperUser

maybe you require a source-ip to be specified in order to be able to reach them,

https://community.fortinet.com/t5/FortiGate/Technical-Tip-How-to-control-change-the-FortiGate-source...

 

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