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Connecting a Site to Site VPN when local subnets are the same

Paul Peterson

We have two offices we need to connect.  One is running a Sophos XG106w while the other is a Sophos XG105w.  Unfortunately both are running the same network scheme 192.168.1.x, is it possible to do a site to site vpn and if so how is this accomplished with step by step instructions, I have not seen anything that explains it clearly.

Thank You



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    Hello Paul,

    Thank you for contacting the Sophos Community.

    You can follow this KB as a reference.

    But basically, you create two Fake subnets for each Firewall on the IPsec configuration for example on XG106

    Local Subnet = 192.168.2.0/24 

    Remote Subnet = 192.168.3.0/24

    Then select NAT and select your real LAN of your XG106

    For the XG106 subnet of 192.168.1.0/24 to access the subnet of 192.168.1.0/24, would need to enter for example 192.168.3.10 if they want to access a server or ping a server on the XG105 that has the IP 192.168.1.10

    You would configure the same way on the XG105w.

    Local subnet = 192.168.3.0/24

    Remote Subnet = 192.168.2.0/24

    Then select NAT and select your real LAN of your XG105

    Regards,

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  • 0

    Hello Paul,

    Thank you for contacting the Sophos Community.

    You can follow this KB as a reference.

    But basically, you create two Fake subnets for each Firewall on the IPsec configuration for example on XG106

    Local Subnet = 192.168.2.0/24 

    Remote Subnet = 192.168.3.0/24

    Then select NAT and select your real LAN of your XG106

    For the XG106 subnet of 192.168.1.0/24 to access the subnet of 192.168.1.0/24, would need to enter for example 192.168.3.10 if they want to access a server or ping a server on the XG105 that has the IP 192.168.1.10

    You would configure the same way on the XG105w.

    Local subnet = 192.168.3.0/24

    Remote Subnet = 192.168.2.0/24

    Then select NAT and select your real LAN of your XG105

    Regards,

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