PPTP/GRE Open Port on firewall

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.

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Posted 5 years ago by Peter Harding in Networking Firewalls

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