office have a win2003 which setup a VPN function for our staff...
but one of the staff which in Philippines, always cannot to our VPN.
He using Win8.1,sometime ok,sometime not ok
I have teamviewer to him, and try telnet to our VPN port,it work.
But whatever I try other PC/XP/Win7/win10,it working.
any idea? it always said VPN err 806, i checked web,it said firewall blocked...but if I can telnet, is it mean no any problem? or Philippines ISP problem block?
By the way, user toldl me last week is ok, but today not ok.
** My vpn server using over 2 years already for most of the China users and no problem.