A UDP-encapsulated ESP packet was decapsulated, and the resulting packet contained a protocol other than TCP, UDP or ICMP. No other protocols are supported for a UDP-encapsulated ESP tunnel when the remote tunnel endpoint is a security gateway behind a NAT.

timestamp is the stack timestamp that indicates the time at which the IP packet was processed by the stack. This time is retrieved from the system time-of-day clock, which usually reflects coordinated universal time. This timestamp might be different than the syslogd message timestamp.

sipaddr is the public source IP address.

dipaddr is the destination IP address.

vpnaction is the name specified on the IpDynVpnAction statement.

tunID is the tunnel ID.

ESPindex is the ESP security parameter index.