Prob with VPN between R55 and FP3

[Josh16]

Hi all,

i'm tryin to build a Site2Site VPN between our NG AI R55 and the FP3 on business partners side.
IKE Phase 1 completes, but then i get "invalid certificate" message. In our Setup there is only Pre-Shared Secret enabled.
In the logfiles at FP3 there is a notification where "AES-256+SHA1, RSA Signatures" is listed. I cant find anything about RSA in my whole config.
Do you have any ideas??

thx a lot, this drives me crazy

 

[Josh16]

The CheckBox in Community Properties "Use only Pre-Shared Secret for all External Members" isn't checked. This did the job.