Hi,
We have mobile users who access the Internet using GPRS cards. They want to access their office network using a VPN connection. From the office side there is a Linux firewall which only allows users in on fixed IP addresses using PPTP (GRE) protocol. What are the dangers of opening up this port (1723 I think?) to allow anyone in (as long as they have a userid and password). This would then allow the mobile users access on un-fixed IP addresses on the GPRS cards.
Is there a safer way to do this?
Thanks.