Hello, I have these messages that appear in my syslog on a regular basis Sep 27 05:52:51 obsd isakmpd[11819]: message_recv: bad message length Sep 27 05:52:51 obsd isakmpd[11819]: dropped message from REMOTE_IP port 4500 due to notification type <Unknown 0> Sep 27 05:53:18 obsd isakmpd[11819]: transport_send_messages: giving up on exchange REMOTEHOST, no response from peer REMOTE_IP:500 ... Sep 27 14:20:59 obsd isakmpd[11819]: message_recv: bad message length Sep 27 14:20:59 obsd isakmpd[11819]: dropped message from REMOTE_IP port 4500 due to notification type <Unknown 0> Sep 27 14:21:26 obsd isakmpd[11819]: transport_send_messages: giving up on exchange REMOTEHOST, no response from peer REMOTE_IP:500 ... Sep 27 21:48:43 obsd isakmpd[11819]: message_recv: bad message length Sep 27 21:48:43 obsd isakmpd[11819]: dropped message from REMOTE_IP port 4500 due to notification type <Unknown 0> Sep 27 21:49:03 villa isakmpd[11819]: transport_send_messages: giving up on exchange REMOTEHOST, no response from peer REMOTE_IP:500
... Sep 27 05:54:37 obsd isakmpd[11819]: message_recv: bad message length Sep 27 05:54:37 obsd isakmpd[11819]: dropped message from REMOTE_IP port 4500 due to notification type <Unknown 0> Sep 28 05:55:04 obsd isakmpd[11819]: transport_send_messages: giving up on exchange REMOTEHOST, no response from peer REMOTE_IP:500 The frequency of these messages are grossly my phase1 lifetime (28800s). The remote firewalls are fortigates. My tunnels don't seem to cause problems but I'm wondering why these messages appear like something is misconfigured. I have searched on a search engine but didn't find something relevant about it. Does anyone know why are these messages appear ? Thank you
