Ports to open for Remote access

Can someone please comfirm which ports I need to open for PPTP and L2TP on my router...worth 500 smackers!!!
Many thanks
Who is Participating?
What exactly are you trying to do? Are you setting up your router as a PPTP / L2TP passthrough? or is the router the end-point for the tunnel(s)?

PPTP uses port 1723 (tcp)
L2TP useu port 1701 (udp)

If this is a passthrough setup you'll also need to forward GRE (protocol 47)
also depending up what exactly it is that you're trying to do... ports: 50, 51, (and 500, for IPSec VPN's) may also need to be opened/forwarded.


Protocol 50 and 51 (whether ah or esp) and udp 500

AndyinJapanAuthor Commented:
Dear all,

Its a pass thought setup to a windows 2003 RAS.

On the router I have the following read out.

nat descriptor type 1 masquerade
nat descriptor address outer 1 218.225.xxx.xxx
nat descriptor masquerade 1 218.225.xxx.xxx udp 500
nat descriptor masquerade 2 218.225.xxx.xxx esp
nat descriptor masquerade 3 218.225.xxx.xxx tcp 1723
nat descriptor masquerade 4 218.225.xxx.xxx gre
nat descriptor masquerade 5 218.225.xxx.xxx tcp 1701
nat descriptor masquerade 6 218.225.xxx.xxx udp 1701

Does this look about right?

Many thanks for your advise
Andy :)
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.