VPN Connection Problems

January 22, 2009 at 10:54:55
Specs: Windows XP Pro, 2.699 GHz / 759 MB
I am trying to set up a VPN connection from my home computer to my work computer/network. Here's my problem. I am able to connect to my work computer, but thats it! I cannot access any shared files, browse, or even ping my work computer or any other computer on that network and vice versa.
Here's the details of the connection setup: Home PC running WXP pro Work PC running WXP home (i know that sounds backwards). Work network is just a basic standard windows network with 4 computers. Work router configured to forward port 1723 (named pptp) to "my" work comuters IP (192.168.1.103). Also ports 1701-1707 named L2TP and port 62515 named VPN to same IP mentioned before. I dont know if they are necessary, but I read in some forum that they might help. Work computer firewall (windows firewall) is set up with exceptions on the ports listed above and named the same as well with home computer. From home when I try to connect, I enter the IP it connects and asks for user name and password, I enter one and it connects, and like stated before, THATS IT! Both computers have the connected icon in the taskbar.
Interesting Info That Might Help:
I had it working once before, before I upgraded all machines in office to SP2, after that is when it stopped working. I also tried changing the server to another machine in the office, switching the settings and trying to connect to home from work, but all the same result. Dont know if this would matter, but when i click on the status of the connection in the task bar, the server and client IP's are not in the 192.168.1.xxx format, but more randonly something like 80.15.118.203 (not the real numbers). From what I remember when it was working before SP2 i had the standard 192.168.1.xxx format, but I could be wrong on that.
Any suggestions on how to get it to work?

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#1
January 24, 2009 at 22:36:23
IS your home network also 192.168.1.xxx, like your work network? Try making one of them differant, like 192.168.2.xxx.

If they're the both using 192.168.1.xxx, if may be getting confused and can cause problems.

Assume that I already did an Internet search.


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#2
January 27, 2009 at 07:37:31
My home network IP address is 192.168.1.4 and my work IP is 192.168.1.103. I will try your suggestion later, but to be honest, i doubt it will work with the luck i've been having on this issue. Will let you know, but any other suggestions?

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#3
January 27, 2009 at 16:44:48
Well, having both subnets the same on both ends can cause problems. Doesn't mean it's the solution, but it's one variable that needs to be fixed.

If you using routing and remote access at the office, here is a link concerning some problems I was having with RRAS and the responses. Somewhere in there or in the links may be an answer.

http://www.computing.net/answers/wi...

Also, if your using a Linksys BEF* style router at the office, it may be having problems with Protocol 47 (GRE). If your current router at the office has a listing for Protocol 47 (GRE), make sure it's forwarded to your VPN server.

Assume that I already did an Internet search.


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Related Solutions

#4
January 28, 2009 at 07:37:19
Ok, I changed my home network IP to 192.168.2.2, but it created other problems. After switching the router's IP range to 192.168.2.2 through 99, my computers new IP is what I listed above. I can connect to the router, but not to the internet, hence not to my office either. Switched back to old IP range and internet working again, but still no VPN. I do have a Linksys router at work, but unsure if its BFE* style how would I find that out, and where would the setting for Protocol 47 (GRE) be?

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#5
January 28, 2009 at 08:30:23
"where would the setting for Protocol 47 (GRE) be?"
That's the problem. Lower-end Linksys routers do not seem to be able to forward 47(GRE). Their "higher" end RV* models may, and I think the business class Netgear models can. I suggest contacting Linksys support (their online chat support is usually pretty responsive), tell them the model of your Linksys at work, and ask them if it is capable of forwarding protocol 47. If not (I believe it won't), ask them which model does and you will have to get that model, or if you get another brand, verify with their presales support which of their products support forwarding Protocol 47.

Also, changing your LAN IP subnet on your home router to 192.168.2.1 should not have prevented you from accessing the Internet provided you renewed your home PC IP settings or rebooted (if it's DHCP).

Also, there is a settings sometimes in routers to allow passing through IPSEC packets, along with uPnP and other services. Make sure this is enabled on both routers.

Assume that I already did an Internet search.


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#6
January 28, 2009 at 08:54:32
Am not at office today to check my router there, but will do tomorrow. As for the internet not working when I change my IP... you're right, there is no reason that it shouldn't, but it just doesn't. I tried restarting computer and router. It is DHCP. Actually I failed to mention before that after the IP change, I cant even access the router configuration (192.168.1.1 in browser). The icon in the task bar says connected to router and shows an IP address, but it acts as if I'm not. Thats what I mean by I have bad luck with these things. With this and many other issues, I configure everything the way it should be, but it just doesn't work!

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