What ports for VPN through IPCop?

I have an IPCop server which I plan on using as a VPN server as well,
behind another firewall, and need to know what ports on that firewall
to forward to the IPCop server.

I did some checking around, and the best I can find is an old posting
saying
tcp port 1723, 47, and udp port 500.

Are those still the ports that are needed to be open to accept VPN
connections?

Thanks for any info!
Liam

(E-Mail Removed) wrote:
> I have an IPCop server which I plan on using as a VPN server as well,
> behind another firewall, and need to know what ports on that firewall
> to forward to the IPCop server.
>
> I did some checking around, and the best I can find is an old posting
> saying
> tcp port 1723, 47, and udp port 500.
>
> Are those still the ports that are needed to be open to accept VPN
> connections?
>

Which kind of VPN? Whose?

And as far as I know, port 47 is not used for any of them. PPTP uses
*protocol* 47, and IPSEC uses *protocol* 50 or 51. Microsoft NAT-T
traversal for IPSEC needs port 4500 UDP.

Joe wrote:
> (E-Mail Removed) wrote:
> > I have an IPCop server which I plan on using as a VPN server as
well,
> > behind another firewall, and need to know what ports on that
firewall
> > to forward to the IPCop server.
>
> Which kind of VPN? Whose?
>
> And as far as I know, port 47 is not used for any of them. PPTP uses
> *protocol* 47, and IPSEC uses *protocol* 50 or 51. Microsoft NAT-T
> traversal for IPSEC needs port 4500 UDP.

Oh, good queation.
The server is IPCop and the client will be the built-in for WinXP Pro.
The most I know about it is it's IPSec.

OK, just did an "ipsec barf" on IPCop and got:
+ ipsec --version
Linux Openswan 1.0.9

Their documentation on their site is very minimal.
The VPN setup page on the IPCop GUI mentions "Road Warrior" though.
Had no idea what that was, but on Openswan's page:
http://wiki.openswan.org/index.php/interoperating
it seems to list RoadWarrior as something DIFFERENT than
Openswan...although that's what "ipsec --version" says it is.

*sigh*

Thanks for any suggestions!
Liam