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dns hosted on utm with dhcp on windows server

llama
Hi!

I'm new to sophos utm 9.2 and am having an issue getting the host names to show up for clients that are connecting through my public wifi.  They are receiving their dhcp requests through my server on windows server 2012.  They are in a different subnet then the rest of my network with 172.17.0.0 and they are using the utm as a dns server.  It looks like the dns server is not storing their host names and when I do a lookup by host name from the utm it isn't able to find them.  Is there a way to have the utm store dns entries for the clients?


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  • 0
    UTM won't do that automatically as it has no full DNS server built in. It is possible to manually enter the hosts with fixed addresses in its database, but that would be about all.

    Managing several Sophos UTMs and Sophos XGs both at work and at some home locations, dedicated to continuously improve IT-security and feeling well helping others with their IT-security challenges.

    Sometimes I post some useful tips on my blog, see blog.pijnappels.eu/category/sophos/ for Sophos related posts.

  • 0
    If you are using ActiveDirectory it's a common recommendation, that clients should use AD DNS servers, and only AD server does public DNS resolution 

    a) via UTM as forwarder ( my recommendation)

    or

    b) directly via public dns forwarders (works too)

    UTM should in best case do DNS forwarder in small, non AD enviroments...

    /Sascha
  • 0
    Hi, llama, and welcome to the User BB!

    Following the two wise suggestions above, you might want to check out a post I maintain that combines the best ideas of many here: 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
  • 0
    Thanks everyone! That was some very helpful recommendations.  I was hoping not to have to set up a second dns zone for my public wifi but it looks like that will be the only way if I want the UTM to log their hostnames.  Am I putting a lot of strain on the utm by using it as the dns server for all the clients?  Shouldn't it be the same amount of strain as the AD DNS server making the request to the utm?  Thanks again!  Also BAlfson, I'll check that thread out!
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