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[SOLVED]DNS best practice?

tbrandl

There are two ways to configure DNS:

One way:
- Allowing DNS outgoing for your internal nameservers
- internal nameservers forwarding to ISP-DNS
- ASG pointing to internal nameservers 

Another way:
- ASG forwarding to ISP-nameservers
- "request routing" on ASG for internal domain pointing to internal nameservers
- internal nameservers forwarding to ASG
 
Which way do you use? And why? Which is "officially preferred"?
Both configurations seem working good for me, we run the first alternative on our cluster, the second in branch offices without internal dns (domain dns reachable via site2site-vpn).

Thanks for your ideas!
Thomas



BAlfson's DNS Best Practice's post has been moved to it's own highlighted thread here: https://community.sophos.com/utm-firewall/f/recommended-reads/122972/dns-best-practice
[edited by: FloSupport at 11:12 AM (GMT -7) on 18 Sep 2020]
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  • 0
    It depends on how you have your internal name server configured. In Windows Server, for example, workstation.mydomain.local is resolved by entries in the Forward Lookup Zones.  ***.yyy.168.192.in-addr.arpa is reolved by entries in Reverse Lookup Zones.  If you don't have DNS on your server configured to create reverse-zone entries automatically, then there's no information to retrieve. [;)]

    Cheers - Bob
     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • 0 in reply to BAlfson
    It depends on how you have your internal name server configured. In Windows Server, for example, workstation.mydomain.local is resolved by entries in the Forward Lookup Zones.  ***.yyy.168.192.in-addr.arpa is reolved by entries in Reverse Lookup Zones.  If you don't have DNS on your server configured to create reverse-zone entries automatically, then there's no information to retrieve. [;)]

    Cheers - Bob


    Hi bob, 
    in reverse lookup zone I have a lot of ptr pointer with ipaddress - hostname, so it should work, I think!
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  • 0 in reply to BAlfson
    It depends on how you have your internal name server configured. In Windows Server, for example, workstation.mydomain.local is resolved by entries in the Forward Lookup Zones.  ***.yyy.168.192.in-addr.arpa is reolved by entries in Reverse Lookup Zones.  If you don't have DNS on your server configured to create reverse-zone entries automatically, then there's no information to retrieve. [;)]

    Cheers - Bob


    Hi bob, 
    in reverse lookup zone I have a lot of ptr pointer with ipaddress - hostname, so it should work, I think!
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