Error on Site2Site IPsec between Fortigate and Sophos XG
I have a faulty VPN configuration on an IPsec connection between a Fortigate and a Sophos XG to which I cannot find a solution.
I have connected several subnets via the VPN:
xx.xx.100.0/24 xx.xx.2.0/24 xx.xx.0.0/26
The connection is established and also works. However, an error is displayed on the Fortigate.
The SAs between the firewalls are displayed with the following notation UP:
Destination: xx.xx.100.0-xx.xx.100.255, xx.xx.2.0-xx.xx.2.255, xx.xx.0.0-xx.xx.0.62
The same SAs are displayed with a different notation than DOWN:
Destination: xx.xx.10.0/255.255.255.0, xx.xx.2.0/255.255.255.0,xx.xx.0.0/255.255.255.192
On the Sophos XG, all SAs are displayed UP.
Does anyone have an idea how I can eliminate this error? This permanently reports a faulty VPN tunnel to our monitoring system.