How do i know what port my vpn is using?

Posted on 2012-04-05
Last Modified: 2012-04-09
my company has a central server with a number of client computers that use a vpn to connect remotely. To use the vpn on another company's wireless network, they need to open the port that my vpn requires to work. How can i figure out what port this vpn is using?
Question by:EfficiencyAnalyst

Assisted Solution

hunart earned 167 total points
ID: 37813290
Check the VPN configuration settings on you VPN device or you can use the simple DOS command "netstat -a", without the quotes.
LVL 11

Accepted Solution

diprajbasu earned 167 total points
ID: 37815317
vpn ports :-
for SSL vpn
port 443(TCP)
IP Protocol=TCP, TCP Port number=1723  
IP Protocol=GRE (value 47)  
For L2TP:
IP Protocol Type=UDP, UDP Port Number=500  
IP Protocol Type=UDP, UDP Port Number=4500  
IP Protocol Type=ESP (value 50)  
IP Protocol=TCP, TCP Port number=443  
For IKEv2:
IP Protocol Type=UDP, UDP Port Number=500    
IP Protocol Type=UDP, UDP Port Number=4500  
IP Protocol Type=ESP (value 50)
LVL 77

Assisted Solution

arnold earned 166 total points
ID: 37819428
In l2tp example above tcp port 1721 needs to be include
The example referenced in the encompassing set of information deals with l2tp over IPSec.
Openvpn uses tcp port 1194 by default but can b configured to use any port.

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
VPN Connection Failure 22 111
ACL per VPN User 12 102
Problem connecting to MS SQL server via VPN 10 76
Mobile VPN IPSEC Watchguard UTM for IOS Devices 4 76
Some of you may have heard that SonicWALL has finally released an app for iOS devices giving us long awaited connectivity for our iPhone's, iPod's, and iPad's. This guide is just a quick rundown on how to get up and running quickly using the app. …
I've written this article to illustrate how we can implement a Dynamic Multipoint VPN (DMVPN) with both hub and spokes having a dynamically assigned non-broadcast multiple-access (NBMA) network IP (public IP). Here is the basic setup of DMVPN Pha…
After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…

896 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now