1 Way VPN ??

[Guest]

The basic problem is that my friend and I have both set up incoming VPN
connections and outgoing VPN connections. He is able to connect to me
without a problem, but when I attempt to connect to his VPN, it goes through
the following:
1. Connecting to the IP Address
2. Verifying Username and Password
3. Registering your computer to the network ... TCP/IP CP reported an
ERROR 733

We've tried everything we know and still can't get it to work. We're using
it to connect through Remote Desktop Connection (not the web based version).
We appreciate the help!

~ Jonathan

 

[Robin Walker]

The basic problem is that my friend and I have both set up incoming
VPN connections and outgoing VPN connections. He is able to connect
to me without a problem, but when I attempt to connect to his VPN, it
goes through the following:
1. Connecting to the IP Address
2. Verifying Username and Password
3. Registering your computer to the network ... TCP/IP CP reported
an ERROR 733

We've tried everything we know and still can't get it to work. We're
using it to connect through Remote Desktop Connection (not the web
based version).

First, you don't need a VPN to use Remote Desktop: you could use Remote
Destop directly between your two PCs.

Second, you need to tell us much more in order for us to understand your VPN
issue. For instance, but not exclusively:

What operating systems at each end?
Any firewalls?
Directly connected to internet or through routers at each end?
If via routers:
- what IP ranges are in use at each end's LAN?
- what port-forward configuration has been done?
What configurations have been made at each end for the outgoing and incoming
VPN objects in "Network connections"?

See also: http://support.microsoft.com/kb/q168720/
Error Message: TCP/IP CP Reported Error 733: the PPP Control Protocol for
This Network Protocol Is Not Available on the Server

If the server end is directly connected to the internet (not behind a
router) there might be problems with the VPN server trying to acquire more
IP addresses via DHCP, which the ISP might not allow. The VPN Server needs
two extra IP addresses, one for each end of the VPN link. If it set by
default to obtain these by DHCP, the ISP's DHCP server might not oblige.

 

[Guest]

Both XP Pro computers with all windows updates install. No firewalls are
active (including Windows Firewall). Connecting VPN between 2 routers, mine
= DLink, my friend's = Netgear I believe. We both forwarded ports 3389, our
personal port number specified for Remote Desktop, UDP 500, and 1723. We
tried it DMZ too. The web version of Remote Desktop worked fine...but the
"full version" located in communications folder in the start menu didn't
connect...so we set up the VPN. Like I mentioned, He can connect to my VPN
incoming...but I can't connect to his (733 error). Once the VPN was
connected however, we were BOTH able to use the "full version" of Remote
Desktop to access each other's computer. The question is about VPN, but it
is in order to make the Remote Desktop function correctly. You said we
didn't have to use VPN to make Remote Desktop work but that seemed to do the
trick. As far as IP ranges should be 192.168.0.x x = 15 and higher. We
both have 2 VPN objects in Network Connections, incoming and the ones we
made to access each other's VPN. Ran through the normal wizards using public
ip addresses...So that's all I know.

Don't worry about going into an explanation to fix Remote Desktop. As long
as we get the VPN rolling, i'm happy with it! Thanks and let me know if you
need more info,

~ Jonathan

 

[Robin Walker]

We both
forwarded ports 3389, our personal port number specified for Remote
Desktop, UDP 500, and 1723.

TCP 1723 is for PPTP VPNs (OK), but UDP 500 is for IPSec, which you do not
require. For PPTP, you also need to forward the GRE protocol: some domestic
routers cannot do this. You need to look for options in the routers which
say something like "PPTP pass-though" and enable them. IF your routers do
not support PPTP pass-though, you might need to upgrade your routers.

the "full version" located in
communications folder in the start menu didn't connect

What addresses were you trying to use in the connection dialog?

Once the VPN was connected
however, we were BOTH able to use the "full version" of Remote
Desktop to access each other's computer.

Again, what address were you using in the Remote Desktop conenction dialog
when it worked this time?

As far as IP ranges should be
192.168.0.x x = 15 and higher.

This is an error. If you are creating VPNs between two LANs, the IP subnet
ranges MUST NOT be the same in both LANs. You must reconfigure one of your
routers so that the LAN addresses are in a different range to 192.168.0.xxx

When you have corrected the IP range clash, please post back with a full
"ipconfig /all" print-out from both PCs taken while you have a VPN connected
in the one direction that works.

 

[Guest]

Thanks for the help Robin. I looked for what you were talking about in my
DLink 624 router, all I found was the entry I already enabled ... under
Virtual Servers tab... PPTP - 1723. It's a pretty new router but I didn't
find anything but that. I'll just have to contact DLink and see what they
say about it. Thanks again,

~ Jonathan