Changed from Cablebased Wan to Glassfiber now IPsec tunnels don't work anymore

[antiager]

Hi People!

I placed this posting also in the german forum. I hope this is ok!?

I recently changed my internet provider to glassfiber.

Ipsec is now not working.

The main reason for this is I guess that the public IP of the opnsense changed from a public IP adress to a private IP because the router that is placed before the OPNsense cannot provide it in the way the other that I used with cable could do.

The tunnels now connect and it looks like everything is working but I can't ping from either side.

All other portforwardings (mail server and so on) work well so I think the exposed host function the router provides and which points to the OPNsense is functional.

I tried a lot but nothing worked.

Can anybody help?