Link to home
Start Free TrialLog in
Avatar of telebasics
telebasics

asked on

XP vpn server behind NAT alcatel router

I am trying to enable VPN access to my XP box. The XP box is behind the alcatel speedtouch (pro setup) and is set to NAT.

It has port 1723 mapped to the XP box and protocol 47 (GRE) mapped also to the XP box.

Now all docu I can find suggest that this should be enough else its teh routers problem.

But when I set the router to default server set to the XP box VPN works, But remove the def server so it uses the mappings again and it doesnt work.

I tried adding the UDP 1723 but that dindt matter.


any elp would be greatly appreciated!
Avatar of cwisofsky
cwisofsky

Maybe I am misreading something, but it appears to me that you are trying to use Windows XP as a VPN host system.  To my knowledge Windows XP doesn't have that feature, Windows server does.  So are you using third party software or the router to host the VPN?  Is the VPN PPTP or L2TP?  Is IPSEC being used?  Each protocol uses different ports and many VPN vendors vary the ports as well.
ASKER CERTIFIED SOLUTION
Avatar of slappa1
slappa1

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of telebasics

ASKER

cwisofsky: XP pro does have that support, so I am not using 3rd party software, it uses PPTP.

slappa1: the problem is security, if i disable the def server or route it to a wrong ip adres I only have to worry about securing ports I really open myself up instead of closing everything down. You did not find a real sollution I understand?
i had a dlink adsl router spare so i used that in the end. i know there are firmware upgrades for alcatel speedtouch 500 series, didn't try it though.
hmm, scary to try that though, it works fine for me on all other accounts ;)
ill check into the firmware upgrades, see if that works.

If someone else still got the magic sollution please be free to hand it out ;)
Oops sorry forgot to close it,
even though I cant get it to work it was the proper answer, it just doent work with that router :(
I work around it by setting the def server to the machine on demand when I need the vpn, and back to the right one when I am done.
Not pretty but in my case good enough