IPSEC tunnel off connecting over PPPOE ISP connection
Good day .... I am not having one :)
We have a Fortigate 70C connecting to a Fortigate 300C (IPSEC VPN)
The ISP provided a 50MB Fiber internet line, and they use a PPPOE dial up "solution" to make the Internet connection "live"
I have installed a Fortigate 60B firewall, configured the PPPOE, added the policies, and the Line is up and running 100%
On the LAN side, I configured one of the public IP addresses inside the /29 range provided.
If I plug my laptop on the Public switch, configured also with one of the public IP addresses, internet works fine. So this confirm that the PPPOE setup and line and routing from ISP etc is fine.
But the main Fortigate 70B firewall just can't connect or make the IPSEC connection to the 300C at head office. The IPSEC config is 100%, as it was working 100%, we changed to the new ISP, worked for a week and just died.
ANything to look at on the 60C which does the PPPOE connection? MTU, or any IPSEC throughput rules or any help ?