VPN Ports

[Ebuntor]

Hi,

I need to open several ports in my router to let a friend connect to a virtual private network (VPN) via a company laptop but I can't figure out which ports are needed.
Simply turning off the router firewall is a solution (and it does work) but it's hardly a safe one.
I understand there are several different types of VPN's but I have no idea which one I'm dealing with.

This isn't a Ubuntu related question so I assumed this was the best forum. :)

Thanks in advance

[mips]

http://www.vpntools.com/vpntools_articles/network-ports.htm
http://www.speedguide.net/faq_in_q.php?category=97&qid=188
http://www.techontour.com/networking/2007/11/03/ports-needed-for-vpn-passthrough/
http://www.vpntools.com/vpntools_articles/port-for-vpn.htm

What connectivity are you trying to allow? What vpn client are you using?

[Ebuntor]

http://www.vpntools.com/vpntools_articles/network-ports.htm
http://www.speedguide.net/faq_in_q.php?category=97&qid=188
http://www.techontour.com/networking/2007/11/03/ports-needed-for-vpn-passthrough/
http://www.vpntools.com/vpntools_articles/port-for-vpn.htm


Thank you, I already tried a few of those ports, but no luck so far. Maybe the other ones will work. :)



What connectivity are you trying to allow? What vpn client are you using?I wish I knew, that's why I started this thread. The friend I'm helping is using a company laptop.

It's running Windows and all the software (the client etc.) is installed but for the rest everything, the whole OS and most apps, are locked down. Some kind of security system is running and I simply don't have access to the settings.

I'll see if I can find the name of the client, let's hope that's something I can access. ;)

[popch]

You could find out what ports are used by running a network sniffer while the VPN connection is being used. A network sniffer listens to traffic on your subnet and shows all packages by IP address and port.

I can not tell from off the top of the head what the sniffer is called, but I believe it's something like ether-ape. Use the 'admin' variant.

[n3tfury]

Thank you, I already tried a few of those ports, but no luck so far. Maybe the other ones will work. :)

I wish I knew, that's why I started this thread. The friend I'm helping is using a company laptop.

It's running Windows and all the software (the client etc.) is installed but for the rest everything, the whole OS and most apps, are locked down. Some kind of security system is running and I simply don't have access to the settings.

I'll see if I can find the name of the client, let's hope that's something I can access. ;)

yeah, just don't post the company name and other info here. i'm glad you haven't so far.

popch, that's a good idea.

[mips]

I can not tell from off the top of the head what the sniffer is called, but I believe it's something like ether-ape. Use the 'admin' variant.

Yes, it's EtherApe and it is in the repos.

[Ebuntor]

Yes, it's EtherApe and it is in the repos.

Ok, thank you, I'll try that. :)

[Ebuntor]

yeah, just don't post the company name and other info here. i'm glad you haven't so far.

popch, that's a good idea.

Hmm, forgive my ignorance but why would posting the company name be a problem? I mean I'm just asking a support question about one of their laptops?

[mips]

Hmm, forgive my ignorance but why would posting the company name be a problem? I mean I'm just asking a support question about one of their laptops?

I think he is referring to the companies network settings etc. Security risk!

[n3tfury]

I think he is referring to the companies network settings etc. Security risk!

yes. posting the name of and subsequent programs that are security related is just not a nice thing to do.