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Can't Resolve Host Name on UTM side from Red appliance.

I have a RED50 it is setup in split/transparent mode. I am getting my IP Address from the Router on the RED side. Everything is working great except DNS doesn't seem to be working properly. I can surf the internet but if I want to connect to a server on the UTM side I have to used the IP address instead of the Host Name.

ex: 192.168.0.1 instead of \MYFILESERVER

I have the same policies in place for the Red device as computers on the UTM . A firewall policy is set for the RED to use DNS.

In the UTM -> DNS

I have our DNS servers listed as forwarders and request routing.

Any ideas? Or things I should check for.

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0 BAlfson over 9 years ago

My guess is that your problem is that the clients behind the RED and router don't know when to use the UTM for name resolution. Do you have all of the domains in 'Split Domains' for which you have Forward Lookup Zones in your internal name servers?

Also, you might want to consider DNS Best Practice.

Cheers - Bob

Sophos UTM Community Moderator
Sophos Certified Architect - UTM
Sophos Certified Engineer - XG
Gold Solution Partner since 2005

MediaSoft, Inc. USA
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0 BAlfson over 9 years ago

My guess is that your problem is that the clients behind the RED and router don't know when to use the UTM for name resolution. Do you have all of the domains in 'Split Domains' for which you have Forward Lookup Zones in your internal name servers?

Also, you might want to consider DNS Best Practice.

Cheers - Bob

Sophos UTM Community Moderator
Sophos Certified Architect - UTM
Sophos Certified Engineer - XG
Gold Solution Partner since 2005

MediaSoft, Inc. USA
Cancel
Vote Up 0 Vote Down

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