I've established a VPN between our Checkpoint FW and a customer's Cisco Router.
Out Checkpoint FW shows no errors in the logs but the customer is reporting that their Cisco router is filling up with the following message:
%CRYPTO-6-IKMP_MODE_FAILURE: Processing of Quick mode failed with peer at 195.75.x.x
IPSEC(validate_transform_proposal): no IPSEC cryptomap exists for local address x.x.x.x
We've checked the parameters again and again and can't see anything wrong on either side yet problem persists. Any ideas?