pfsense as IPSec/L2TP client with using login credentials and Pre-shared key?

[daliose]

We have a customer with an Allied-Telesis AR415 router and IPSec is configured. The customer would like to get installed a P2P connection between his main and side office.
I am not allowed to make changes to the Allied-Telesis router settings, so I am wondering if I can get pfsense connected with the existing settings.
IPSec is working fine at the Allied-Telesis on any Windows/Linux PC. If this would work with pfsense, it would be great to get some hints for a manual.

Thanks

Maik

[jimp]

No, pfSense can't use that style of connection for a site-to-site link.

L2TP/IPsec is a mobile/remote access style, it wouldn't allow two-way communication between the LANs on either end.