Gateway 'DHCP_Port2_GW' is Down error

Check the dgd.log in /log/ or the logviewer.

Basically this means, the dgd (dead gateway detection) could not reach the peer via Ping (Monitoring).

If the IPsec did not fail, it could be because your monitoring host, you selected, went unreachable. 

I checked that log file for the latest time/date this issue happened and there was nothing indicating an error. Any other ideas?

Is there a way to disable this feature in the Sophos or to at least change its parameters?

Hi Ricky Stiles,

If only one failover condition is configured as ping the gateway IP address, try to add one more failover condition to ping some external IP address or use a TCP connection on port 80.

To configure failover conditions, do as follows:

1. Click Add to add a new failover rule. You can also edit an existing rule.
2. Enter the details for the rule.

   This screenshot shows an example rule. The rule states that if XG Firewall can't ping the gateway IP, 172.16.16.15, or establish a TCP connection on port 80 to 4.2.2.2, the gateway is considered down.