PPTP Server behind firewall; ports to forward

[ziddey]

Sorry, I jumped the gun a little bit initially, and now have moved on to another question. So the title doesn't properly describe this.

I have a dedicated server running poptop for pptp that runs behind a firewall. The router is running tomato and has a upnp server. Is there any way to have upnp support from the vpn connections? Thanks

 

[PHUNBALL]

Not sure, but to answer your first question, you need to open up port 1723 and protocol 47 (GRE).

 

[ziddey]

Thanks. About the first question, I solved it already. I knew to forward tcp 1723. However, I wasn't sure how to forward gre 47. So I simply omitted gre47 forwarding and it still works just fine.

 

[YeOldeStonecat]

Thanks. About the first question, I solved it already. I knew to forward tcp 1723. However, I wasn't sure how to forward gre 47. So I simply omitted gre47 forwarding and it still works just fine.

It's a setting which allows the NAT to allow IP type 47 to pass through "unmolested"..as it's not a NAT friendly protocol. It's nothing to do with opening/forwarding a port...it's not "port 47". Often many consumer grade routers will just have a checkbox to allow PPTP VPN traffic, and you'll often see L2P also. Many routers also just allow it to pass by default.