We are having this strange issue and I am unable to figure out what’s causing it. We bought some new data cards of a different cellular provider; since then people who use those cards to connect their laptop to the Internet cant vpn into our network. The internet works fine; if we use the existing data card of the old provider; vpn connects okay. It’s happening across all the Os..windows XP to Windows 8..any help would be appreciated
VPN Server: Windows 2008
works fine when using old data card or via wifi.