I have a site to site VPN set up but am experiencing dropouts. I will paste below some of the log entries from site 2. Keepalives are left as default.
Group = 79.xxx.xxx.xxx, IP = 79.xxx.xxx.xxx, Received DPD sequence number 0x210df0e3 in R_U_THERE_ACK, expected 0x210df0e4
Group = 79.xxx.xxx.xxx, IP = 79.xxx.xxx.xxx, IKE lost contact with remote peer, deleting connection (keepalive type: DPD)
IPSEC: An inbound LAN-to-LAN SA (SPI= 0xA78A69E8) between 213.xxx.xxx.xxx and 79.xxx.xxx.xxx (user= 79.xxx.xxx.xxx) has been deleted.
IPSEC: An outbound LAN-to-LAN SA (SPI= 0xCDB659DA) between 213.xxx.xxx.xxx and 79.xxx.xxx.xxx(user= 79.xxx.xxx.xxx) has been deleted.
Group = 79.xxx.xxx.xxx, Username = 79.xxx.xxx.xxx, IP = 79.xxx.xxx.xxx, Session disconnected. Session Type: IPsec, Duration: 0h:00m:50s, Bytes xmt: 3818, Bytes rcv: 5045, Reason: Lost Service
One of the sites 79.x has a slow internet connection which I think may be to blame here. Any suggestions gratefully received.