Feb 07, 2012

Explaining VPN Error Codes | Software Mega Mall VPN Service providers include Express VPN, Nord VPN, VyprVPN, Private Internet Access, HideMyAss, Cyberghost, Cactus VPN, VPN ac, IP Vanish, Liquid VPN, Strong VPN. Stay hidden! Stay hidden! September 10, 2016 5:19 pm VPN error 721 - Linksys Community Open these ports 1723, 500 TCP protocol. and add a trigger for port 500 and 10000 (if your dsl supports this), but basicly you should not have to open any port, it sounds more like a problem between WRT54G and the Speedstream where the Speedstream is not passing everything to the WRT54G.

VPN and Verify Password Error 721 - March 2006 - Forums - CNET

Jun 23, 2010 Vista VPN Connection error 720 - Microsoft Community

VPN error 721. HELP!!!! | Tech Support Guy

Dec 12, 2008 Error 721 deja vu - Virtual Private Networking