I tried disabling trend micro security features but that didn't help.

Yes Deco is the main router and behind it is only a switch.I am using Dynamic IP (with reserved IP from ISP).Ports 80,443 on web server.

Model : Hardware Version : Firmware Version : ISP : I have an Owncloud server at home that I connect to via HTTPS and domain name which points to home networks WAN address, port forwarded to host....