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XG DNS Configuration

BillGreville

Hey Team,

I have tried to work this out from the forums but I'm simply not getting it!

The XG has multiple WAN interfaces:

- Primary with STATIC network assignment
- Failover 1 with DHCP network assignment
- Failover 2 with PPPOE credentials

Network / DHCP is set to use the LAN gateway.

Network / DNS is set to obtain from the servers specific to the STATIC network assignment.

But, my question is, what happens if the Primary WAN interface goes down and Failover 1 WAN can't access the DNS servers related to the Primary?

NB: There are no servers behind the XG! I just want snappier web resolution when using a Failover WAN.

Bill.



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  • 0

    Hello  

    The firewall queries DNS servers in the listed order until it receives a response.

    For example, it queries the second server only if it doesn't receive a response from the first server within the time-out period.

    It considers an NXDOMAIN (domain doesn't exist) response valid and won't query the next server.

    Hardik R 
    If a post solves your question use the 'Verify Answer' link.

  • 0

    if you use the ISP-router as DNS-Server (or a ISP-specific DNS), it may result in no-dns-resolution if ISP-Router is not reachable.

    I would suggest to use public available DNS-Servers, which work over every connection. (like 1.1.1.1 or 8.8.8.8) 


    Dirk

    Systema Gesellschaft für angewandte Datentechnik mbH  // Sophos Platinum Partner
    Sophos Solution Partner since 2003
    If a post solves your question, click the 'Verify Answer' link at this post.

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