what ports numbers are for vpn

Greetings Everyone,
I am setting up a Standard Edition 2003 with RAS for VPN, I will config it
for legacy clients and windows 2000 & xp clients ,therefor I will config VPN
for "PPTP" and L2TP w/IPsec. What port numbers are need to configure on the
firewall? The ISP controls the firewall and I have allready instructed them
to port forward 3389 to the IP of the server for RDP connectivity. Any
feedback is humbly appreciated. Thank you.

Joey :-)

quoted from http://www.ChicagoTech.net
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.


--
For more and other information, go to http://www.ChicagoTech.net

Don't send e-mail or reply to me except you need consulting services.
Posting on MS newsgroup will benefit all readers and you may get more help.

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN, Anti-Virus, Tips & Troubleshooting on
http://www.ChicagoTech.net
Networking Solutions, http://www.chicagotech.net/networksolutions.htm
VPN Solutions, http://www.chicagotech.net/vpnsolutions.htm
VPN Process and Error Analysis, http://www.chicagotech.net/VPN%20process.htm
VPN Troubleshooting, http://www.chicagotech.net/vpn.htm
This posting is provided "AS IS" with no warranties.
"Joe" <jbcandullo(nospam)@mmadisonservices.com> wrote in message
news:%(E-Mail Removed)...
> Greetings Everyone,
> I am setting up a Standard Edition 2003 with RAS for VPN, I will config it
> for legacy clients and windows 2000 & xp clients ,therefor I will config
> VPN for "PPTP" and L2TP w/IPsec. What port numbers are need to configure
> on the firewall? The ISP controls the firewall and I have allready
> instructed them to port forward 3389 to the IP of the server for RDP
> connectivity. Any feedback is humbly appreciated. Thank you.
>
> Joey :-)
>
>
>

Hi Joe,

Since I don't have all necesary information on implementation I can only
answer in general...

GRE -- IP protocol 47
IPSec AH -- IP protocol 51
IPSec ESP -- IP protocol 50
L2TP -- UDP 1701
PPTP -- TCP 1723

NAT-T -- TCP 4500
ISAKMP -- TCP 500

Port Requirements for the Microsoft Windows Server System
http://support.microsoft.com/?kbid=832017

Mike

"Joe" <jbcandullo(nospam)@mmadisonservices.com> wrote in message
news:%(E-Mail Removed)...
> Greetings Everyone,
> I am setting up a Standard Edition 2003 with RAS for VPN, I will config it
> for legacy clients and windows 2000 & xp clients ,therefor I will config
> VPN for "PPTP" and L2TP w/IPsec. What port numbers are need to configure
> on the firewall? The ISP controls the firewall and I have allready
> instructed them to port forward 3389 to the IP of the server for RDP
> connectivity. Any feedback is humbly appreciated. Thank you.
>
> Joey :-)
>
>
>