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UTM, Uplink balancing, VPN and DNS

I have two Interfaces on my UTM accessing the internet. Primary interface 192.168.88.1 and secondary, slower 192.168.178.1. Second one is deactivated because when I activate it, the UTM will direct all traffic through the second one, which is significantly slower and only meant as fallback. Also when both are activated, VPN connections become very unstable.

Having the second one deactivated, and no matter what I enter under DNS forwarding, the tab tells me current DNS server is 192.168.178.1. Also my VPN log will name 192.168.178.1 as DNS server. This should obviously not be and I am at a loss to what I can do.

 

Any help is appreciated. Thank you so much.



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  • Hallo Lennard and welcome to the UTM Community!

    Dirk got you pointed in the right direction.  I also like having both interfaces in Active.  You also could use a Multipath rule to send all traffic through the faster interface when it's functional and through the slower when the faster is down.  Depending on the configuration, the weighting suggested by Dirk can be a better choice.  You'll want to try both approaches to see which works better with your setup.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
Reply
  • Hallo Lennard and welcome to the UTM Community!

    Dirk got you pointed in the right direction.  I also like having both interfaces in Active.  You also could use a Multipath rule to send all traffic through the faster interface when it's functional and through the slower when the faster is down.  Depending on the configuration, the weighting suggested by Dirk can be a better choice.  You'll want to try both approaches to see which works better with your setup.

    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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