Important note about SSL VPN compatibility for 20.0 MR1 with EoL SFOS versions and UTM9 OS. Learn more in the release notes.

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I want internal traffic to an internal domain to go out through an external link and then come back in. How can I do that?

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I want internal traffic to an internal domain to go out through an external link and then come back in. How can I do that?



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  • 0

    You want to do a Loopback NAT? 
    You can do a NAT to the external Interface of the firewall and use SNAT as well (MASQ), which will do the trick.

    Do: NAT: 

    Coming from Client (or ANY) Translated Source: MASQ

    Going to: Firewall WAN IP Translate Destination: Server internal

    Service ANY

    That should do the trick. 

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  • 0 in reply to LuCar Toni

    Instead of Service ANY you could only use the service(s) you need to go to this internal machine. Otherwise traffic on every port will be NATed to the internal device.

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

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  • 0 in reply to LuCar Toni

    Instead of Service ANY you could only use the service(s) you need to go to this internal machine. Otherwise traffic on every port will be NATed to the internal device.

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

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