My only DC /DNS server passes almost every test except the NetDiag /test:defGW. It comes back with failure stating no default gateway is found. The server can reach everywhere in building and reaches the internet so I'm not sure why I am receiving this. I do know, that pings to the internal interface of router/firewall (default gateway) fail from any and all machines. Does this test use ping? If not what could be going on and should I just ignore that test?