I'm running into a problem I didn't have before, and I'm not sure what the reason for the problem is.
I have a gateway router attached to the Internet, and behind that an ISA 2004 box (temporary setup due to some ISP issues that will be resolved soon). Anyways, from a PC directly connected to the gateway router, I can use PPTP to connect over the internet to a remote office.
From a PC (Xp Pro SP 2) behind the ISA 2004 firewall, I can't connect to the same VPN server. I get this error: Error 619: A connection to the remote computer could not be established, so the port used for this connection was closed.
If I try the same VPN connection from the ISA server (to the remote VPN) I get a slightly different error: Error 628: The connection was terminated by the remote computer before it could be completed.
I have a rule configured in ISA to allow PPTP access from the Internet and Localhost networks to the External network, as well as an allow all rule. It seems to be a problem with the ISA doing something to the VPN, but I can't figure it out.
RE: VPN Connection Issues Behind ISA - 19.Aug.2005 1:42:00 PM
I having a problem with the communication with ISA to Local Remote Network. The tunnel is established successfully. I can ping from internal network to remote network and vice versa, but from ISA Machine (Windows 2003+ISA 2004) i can't communicate. It display:
"Negotiation ip security" and don't receive any reply.
Hello, i also faced this problem many times but i fixed it, i also got some help from this website error628 , hope someone might get help from this article. It is generally an issue with your modem, phone line, or a blocking port. This article answers the question how to fix error 628 Windows 7. Contact ISP to Check the Phone Line Upgrade the Network Driver Repair your Network Configurations Reinstall Modem Device Disable the Firewall Protection