My Sophos XG firewall in internet port every 1 to 3 hours 40-50 second down,

Hi Nilesh,

I would like to check two things:

1. logs from Log Viewer | System | Gateway; 

2. Go to Network | WAN Link Manager then take a screenshot of the inside configuration of the gateway host.

Thank You

Dear Sir 

Please give me any solution from this problem.... 

Failover rules are perfect, no change required here. Tell us more about your ISP connection and if you have a line coming on XG from a local internet router/modem, then place an unmanageable switch between the XG firewall and the modem and monitor the issue.

Thank You