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What port does VPN use 1

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phalynx24

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May 4, 2004
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Does anyone know which port VPN uses? and how to test if the port is open. MY ISP keeps telling me that it is open but i want to see if there is a way for me to test it by maybe pinging a port or something?
 
quoted from
Which ports need to be opened for running VPN

A: PPTP VPN uses TCP Port 1723, IP Protocol 47 (GRE); L2TP: UDP Port 1701; IPSec: Pass IP protocol 50 and 51. Note: 47 is a protocol number and not TCP port. The protocol name is GRE. It'll make a big difference when configuring your firewall or router.


Robert Lin, MS-MVP, MCSE & CNE
Windows, Network, Internet, VPN, Routing and How to at
 
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