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VPN Settings for BT Yoyager 220v Router

Posted on 2006-10-31
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I need to provide VPN access from home [PC running XP Pro, SP2] to my office [small SBS 2003 network using BT Voyager 220v router], and I'm having trouble determining the right settings on the router to allow this.

anyone able to help?
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Question by:nigelatmsg
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by:Rob Williams
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I don't believe the BT Voyager 220v is a VPN router, so I assume you are wanting to connect to the SBS as the VPN end point and configure the Voyager unit for VPN pass through. If so have a look at the following instructions:
When working with SBS it is very important to use the wizards. The end RRAS configuration is the same, but the way all the interrelated components works is somewhat different. The wizards will also make any changes to the firewall.
To create the server end of the VPN open the server management console, click on Internet and E-Mail, followed by Configure remote access,, then just follow the very short wizard. If you want to verify the configuration there is a great article at:
http://www.onecomputerguy.com/networking/w3k_vpn_server.htm
However, only use it for reference, use the wizard for the basic configuration.

As for the client end SBS again has a wizard. This will actually create a disk to configure the remote computer to connect. This is on the same page of the Server management console and is called Create a remote connection disk. The client can be configured manually, but it is recommended to use the disk. Should you need to do so manually see:
http://www.onecomputerguy.com/networking/xp_vpn.htm

As described above, you also need to forward port 1723, and GRE. Depending on the router, GRE may be a specific command, or is often labeled "PPTP pass-through". Detailed instructions for port forwarding for the BT Voyager 220v:
http://www.portforward.com/english/routers/port_forwarding/BT/Voyager220V/Point-to-Point_Tunneling_Protocol.htm
The only other thing to remember is the subnet you use at the remote office needs to be different than the server end. For example if you are using 192.168.16.x at the office , the remote should be something like 192.168.2.x
Also depending on your network configuration you may have problems connecting to devices by name. Using the IP address is less problematic such as \\192.168.1.111\SharenName.

Another option you may want to consider for connecting to your office, since you have SBS is Remote Web Workplace,e which allows remote users to connect to a local workstation to work remotely. This is controlled with very secure access and works well:
http://support.microsoft.com/kb/833983
http://www.sbsfaq.com/Lists/FAQs/DispForm.aspx?ID=11
This requires ports 443 and 4125 be forwarded on the router.
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by:Rob Williams
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nigelatmsg, were you able to try the above?
--Rob
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by:nigelatmsg
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Rob,

It turned out that the Voyager 220V is perfectly happy to allow VPN pass-through providing you tell it to.

The problem is that the device is shipped without instructions at this level, and the procedure as detailed at www.portforward.com is at best misleading [and it this web-site that the BT web-site directs enquirers to].

In the end we elected to buy some help from BT's technical support group and, in watching what the specialist was doing in running our system remotely, it became clear the the portforwarding stuff was simply putting us off the scent.

Once we realised what do to, we used the same settings on client 220v routers where we also needed VPN pass-through.

Many thanks for continuing to track the problem.

Nigel Lancaster
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by:Rob Williams
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Glad to hear you were able to resolve Nigel. GRE pass-through is often a problem. It can also be deceiving as it is sometimes possible to establish a connection, but without GRE, not be able to communicate.

Thanks for the update.
Cheers,
--Rob
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by:Rob Williams
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Perhaps this one warrants an accepted.
>>"turned out that the Voyager 220V is perfectly happy to allow VPN pass-through providing you tell it to"
Enabling VPN pass-through was listed as a requirement twice in the initial post. The reference to port forwarding was exactly, that port forwarding not how to enable VPN pass through.
Just my thought.
Thanks,
--Rob
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