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

Site-to-site IPsec VPN with Mikrotik and Overlapping network

Hi everyone,

I'm having difficulty getting site to site IPsec to work properly with a Mikrotik device.

Both LANs use the same class and to configure the Sophos (SG115 SFOS 20.0.0 GA-Build222) I followed these instructions: /en-us/webhelp/onlinehelp/AdministratorHelp/SiteToSiteVPN/HowToArticles/S2sVPNIPsecConnectionPBVPNNATSameSubnets/index.html

The tunnel is established correctly, but if I try to ping a remote host (ex. from the Sophos LAN, I get timeouts.

However, if I try to ping a host behind the Sophos from the Mikrotik I get a response and at that point the ping from the host behind the Sophos to the remote LAN also starts to work.

In the IPsec configuration I enabled the NAT option

Thanks to anyone who can help me

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[edited by: Raphael Alganes at 2:49 PM (GMT -7) on 17 May 2024]