Linksys Routers and Microsoft PPTP

Point-To-Point Tunneling Protocol (PPTP) is another tunneling protocol used to connect a remote client to a private server over the Internet. PPTP is one of the most widely used VPN protocols because of it's straightforward configuration and maintenance and also because it is included with the Windows operating system.
http://electronicshelponline.blogspot.com/ A VPN or Virtual Private Network is a method used to add security and privacy to private and public networks, like WiFi Hotspots and the Internet. VPNs are most often used by corporations to protect sensitive data.

hi

go to following link it will give you all your solution for wireless networking

http://www.microsoft.com/windowsxp/using/networking/setup/wireless.mspx

Did you already forward port 1723? I guess you have done that. To isolate it, try to bypass the router and setup or establish the VPN session there. If it doesn't work, maybe your ISP doesn't allow port 1723 or it's just the modem.

http://www.microsoft.com/windowsxp/using/networking/expert/russel_diagnostics.mspx

windows can do it with no software needed!

There is a detailed instruction guide at that link!

Go to Control Panel- Network Connections-Network Connections and look for anything that says VPN or PPTP. Right-click on it and click disable.

Go back to your browser- click on Tools- Internet Options-Network Connection and make sure Never Dial A Connection is enabled. Click on LAN settings and make sure nothing is checked. Click OK.

Try to log back in to your router by tying in 192.168.1.1 and reconfigure the settings again.

Any reason why they're not both on the same subnet?

The "Virtual Server" setting is designed to give the general public access to a network resrouce (web/ftp/media server) on your internal network. If your the VPN concentrator is external to your network (meaning you'll have to use the internet to connect to it), then you won't need to define a virtual server on the DI-624.

You'll just need to enable the IPSEC and PPTP VPN Passthrough which it sounds like you've already done this. I've run into some ISP's that block VPN connections out of their network. If you have the ability, try to directly connect your laptop into your cable/DSL modem in place of your router and see if you can make a VPN connection, if not contact your ISP, if you can then verify you enabled the VPN passthroughs because your router is blocking them.

GIve it a shot and let us know your results.

Microsoft uses IP Protocol 47 [GRE] for this secure tunnel. Provided that the PPTP Pass Through is set to Enable on the Router's Filters page and port 1723 is forwarded to the VPN Server, the Router will allow authentication and remote access into your network. The router will also allow you access remote PPtP networks from behind the router providing the PPtP Passthrough is enabled on the router.

You?ll need to setup Port Forwarding to set up a PPtP tunnel behind a Linksys router. Please follow these instructions to setup the router to forwarding incoming PPtP traffic to your PPtP server: Getting Started 1. You must set a static IP address on the server. If you're unsure of how to do this please go to our Answer ID 534 for information on setting a static IP address in Windows. 2. Once the static IP address has been assigned please go to your desktop and double click on Internet Explorer (Located on the Start Menu in Windows XP) 3. Once "Internet Explorer" opens, please type http://192.168.1.1into the "Address Bar" and click GO 4. The "Enter Network Password" window will appear. Skip user name and type admin (admin is the default password) as the password, and click OK. 5. This will bring up the routers "Setup" section. Look under "Domain Name" and check what version of the firmware you're using. 6. You will need to click on the Advanced tab to the very right. Once the "Advanced" tab comes up please go to the Forwarding tab. Firmware prior to 1.32 This will not work with firmware prior to 1.32 Firmware between 1.32 and 1.36 Service Port Range 47 ~ 47 1723 ~ 1723 IP Address 192.168.1.3 192.168.1.3 Firmware after 1.36 up to 1.40m Service Port Range 47 ~ 47 1723 ~ 1723 Protocol Both Both IP Address 192.168.1.3 192.168.1.3 Firmware after 1.40m Customized Application VPN VPN Service Port Range 47 ~ 47 1723 ~ 1723 Protocol Both Both IP Address 192.168.1.3 192.168.1.3 Finishing up Click Apply, then Continue. Restart your computer

Nortel Contivity will work with the your D-Link router, however its functionality depends on the authentication type (AH will not work), NAT compatibilty mode, and disabling keep alives on the server. Contact your Network Administrator to find out how your VPN is configured. Step 1 Verify that you are using the latest version of firmware on your router. Step 2 Login to the Web Management for your router by entering its IP address (192.168.0.1) in your web browser. The default username is admin, and the password is blank. Step 3 Click the Advanced Tab to access the Virtual Server Settings. There is a list of pre-defined Virtual Server Rules towards the bottom of the page. Find the IPSec Rule. Click the pen and paper icon to edit its settings. Enable the rule, enter the IP address of the computer attempting to connect to the VPN in the Private IP field, then Apply the changes. Step 4 Create a new Virtual Server entry. Name the Virtual Server, "NortelVPN". Enter the IP address of the computer attempting to connect to the VPN in the Private IP field. For the Protocol Type, select Both. Enter 9550 for both the Public and Private Ports. Set the Schedule to always, then Apply the settings. Step 5 Access the Tools Page, then click the Misc button. Disable IPSec Pass-through, then click Apply. If the VPN Server is properly configured to work with clients behind NAT routers you should be able to connect to the VPN.