IPSEC tunnel goes down every day
A month ago I switched our company's firewalls over to PFSense.
Everything was working fine for a month until two days ago when IPsec tunnel went down after work hours. I found out about this the next day and tried to get it working again but suddenly the tunnel went up again. The same thing happened the next day. I cannot figure out what the problem is.
Tunnel is working between around 08:45 - 09:00 to around 17:00 - 17:15 and then refuses to reestablish before 08:45 - 09:00 in the morning.
Here is the config for ipsec on SITE_A. SITE_B is identical but only IP-s changed.
conn con1000 fragmentation = yes keyexchange = ikev2 reauth = yes forceencaps = no mobike = no rekey = yes installpolicy = yes type = tunnel dpdaction = restart dpddelay = 10s dpdtimeout = 60s auto = route left = SITE_A_IP right = SITE_B_IP leftid = SITE_A_IP ikelifetime = 28800s lifetime = 3600s ike = aes256-sha256-modp2048! esp = aes256gcm128-sha256-modp2048! leftauth = psk rightauth = psk rightid = SITE_B_IP rightsubnet = 192.168.1.1/24 leftsubnet = 192.168.10.0/24
Any help would be appreciated.
I will add logs from today's morning. Last connection was successful but before failed.
Found out the cause. ISP was suddenly blocking the connection for no apparent reason.