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How to introduce PTP connection between 2 sites

We're thinking of establishing a PTP connection between 2 buildings (about 200ft apart) using Ubiquity AirFiber. Primarily to use as backup internet for the remote office.


Main Office - has 2 ISP's and LAN

Remote office - has 1 ISP and LAN


What's the best way to implement the new PTP connection on the Sophos firewalls in this scenario? Ideally we'd like to use the PTP connection for all inter-office traffic and have the remote office use its local ISP for internet. Then on remote office use the PTP connection for internet if its local ISP goes down.

Any advice would be greatly appreciated.

Thanks.



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  • In the Main Office, just a Static Route like 'Remote (Network) via PTP Interface' and a firewall rule like 'Main (Network) & Remote (Network) -> Any -> Main (Network) & Remote (Network) : Allow'.  The PTP Interface would not have a default gateway

    In the Remote office, the same firewall rule and, instead of a Static Route, Multipath rules (in order) like:

    1. 'Any -> Any -> Main (Network)' bound to PTP (with default gateway) with 'Skip rule on interface error' not selected in 'Advanced''
    2. Any -> Any -> Any' bound to External interface.

    You might also consider a RED tunnel in addition to the PTP to have a backup for the PTP connection between the sites.  Then, both would use Multipath rules to prefer the PTP (with default gateway in both sites) over the RED tunnel and all other traffic.

    Is that what you had in mind?

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • Yes, this is perfect thanks. Does the PTP interface at remote site need to be WAN2 or just a VLAN port?

    Thanks!

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