I am trying to bring up the S2S tunnel between a Cisco 4331 router and a PF Sense firewall.
router (192.168.5.2) --> ISP Modem(x.x.x.x) <--> Internet <--> ISP Modem (y.y.y.y)--> PF Sense firewall (172.16.10.1)
Both parameters are equal at both ends, cross verified a few times.
Any thing needs to be added when configuring these type of scenarios?
Following is the debugs received from the router also contains config.
I would verify that the PF Sense firewall is receiving the authentication exchange message on port UDP 4500 with a capture. The router keeps retransmitting because it does not hear back from the firewall.