We just upgraded our Comcast service and our VPN now only allows one person to connect at a time. Comcast denies responsibility.
We have a static IP address. The new modem is a Netgear CG3000DCR. I've setup port forwarding for a PPTP connection. Our old modem was a SMC Networks SMC8014. The setup for port forwarding on that was similar, except you had to specify the GRE protocol. On the CG3000DCR there isn't a place to do this.
We're relying on the modem as the DHCP. Our server runs Windows 2003 Small Business Server. It's setup to support 10 PPTP connections. Our clients are mainly Windows 7 and Windows 8.
Can anyone help? Comcast says they offer no technical support for VPN. They offer no documentation for this modem. Thanks to anyone who can provide expert help!