I have a D-Link DVG-G1402S router, I'm trying to setup VPN connect for a windows VPN server, which inside the network. I tried use modem directly connect to the server, it work, so it process my Internet connect and server are setup correctly. After I add the router, I set the "virtual server" to open ports 1723 and 47. And I make sure the "PPTP passthrough" and "IPSec" are enable. However it doesn't work. Is there other setting I could do to setup?

If you can't connect via the Internet to your workplace network from home (or another location), check the items in this list:

• Make sure that you typed the virtual private network (VPN) server name exactly as provided by your network administrator.
  

• You must have an active Internet connection for a VPN connection to work.
  

• If your modem is external, make sure that the modem power is turned on.
  

• Contact your network administrator to make sure that you have the appropriate connection and domain permissions on the remote access server.
  

• This could be a certificate problem. For assistance, contact your network administrator.
  

• A VPN connection won't work with an active Winsock proxy client. Contact your network administrator to make sure the Winsock proxy client is not enabled.
  

• If you know the IP address (for example: 131.107.10.25) of a website, type that address in the address bar of your web browser and press Enter. If this works, there is probably a Domain Name System (DNS) resolution problem. For assistance, contact your network administrator.
  

• If you have special software that's required or installed by your workplace, it could be part of the problem. For assistance, contact your network administrator.
  

• If you know the IP address (for example: 131.107.10.25) of your VPN server, type that address for the VPN connection, and then press Enter. If this works, there is probably a DNS resolution problem. For assistance, contact your network administrator.
  

• There could be a problem with the server you're trying to connect to. For assistance, contact your network administrator.
  

If you try to connect with a VPN connection and you see a message that says "The local computer does not support encryption" and has the error code 741, it's possible that the encryption that your computer uses doesn't match the encryption used by the VPN server. To change the encryption settings so that your computer uses the recommended setting of 3DES, follow these steps:

1. Open Connect to a Network by clicking the network icon ( or ) in the notification area.
   

2. Right-click the VPN connection, and then click Properties.
   

3. Click the Security tab.
   

4. Under Data encryption, select Maximum strength encryption (disconnect if server declines), and then click OK.
   

5. Open Connect to a Network by clicking the network icon ( or ) in the notification area.
   

6. Click the VPN connection, and then click Connect to try connecting again.
   

IT does Security • SIP Authentication with Password Encryption • Configuration Download Using HTTPS and SSL/TLS Clients Certification Encryption and Authentication • VoIP NAT Traversal (SIP/STUN) • NAT/Firewall (NAPT, TCP/UDP, DMZ, ALGs) • VPN Pass-Through • Packet Filtering by IP Address, Port Number, and Protocol

open these VPN ports for the client machine ip in the router interface...

TCP&UDP 50

TCP&UDP 51

TCP&UDP 500

TCP&UDP 10000

TCP 1723

UDP 1701

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.

hi, mate check firewall settings of your modem/router. Then contact your IT administrator and he should be able to make changes to configurations for you. In most cases if server classify's your connection as unsafe it rejects it.

as you told me that all the ports are open so in that case you can get in touch with your ISP and ask them to enable IPPASSTHROUGH on your office laptop.

Hi,
I resolved my issue by updating the DI-624s firmware.
regards,
boreeeeec

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.

I'll need to know what router you're using, make and model, for more specific help, but sometimes there is an option for IPSec passthrough. For example, on my Linksys Wireless Router WRT54G, there is a set of buttons under Security/VPN that are entitled IPSec Passthrough, PPTP Passthrough, and L2TP Passthrough. Since I don't know what router you're using, I can't tell you wether or not your router supports such functions or not, but if it does, you need to enable them.