Tags: IP Address Lookup, Information, and Location, Test Your Internet Connection Speed
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#1
09-28-2008, 03:58 PM
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VPN Question
Hi to all - strange isue that has had me stumped for some time - months! I have a DSL modem with local tel company - can surf, get email, both hotmail, pop3 and Exchange over Internet and I can connect to my office via Remote Desktop - all seamless by the book no problem. However...... I have a VPN setup at my office but cannot connect to the office from my home vi the VPN - BUT I have no problem connecting to the office via the VPN from anywhere else- even a free wireless hot spot in a hotel using the same saved network connection settings that don't work at home. Contacted the ISP (phone co) who said that as you are able to surf get email etc then you should have no issue with a VPN? Seems logical? I have a Belkin Pre N wireless router (VPN doesn't work from desktop in the house either) - I have tried disabling the firewall - it is a PPoE connection - I have resent this - I have even reset the router to origianal factory settings. All with the same result - no connection - doesn't get past verifying / authenticating user name and password - and I have confirmed this and have connected using the same uname and p/w. I have tried to disable any firewalls security in Windows - (temporarily disabled firewall and set security to low) - same result. Anyone have any "Pearls of Wisdom"? Would be eternally indebted if someone could solve this vexing issues?  Thanks, Jeremy |
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#2
09-28-2008, 07:23 PM
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What are you using as a VPN server?
If it is PPTP (windows RRAS), did you forward port 1723 to the host PC? |
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#3
09-29-2008, 08:03 AM
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Tnks for the reply...
Not too sure - we have a VPN firewall - Secure Computing. We have a server SBS 2003 Small Business server - not sure if we are using RRAS - I'll check. I'll try and forward the port (in the router I assume?) and let you know how I get on - thanks again! |
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#4
09-29-2008, 04:39 PM
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Hi jcaff,
This is what I would do. I'm guessing when you say you've connected to the office VPN via a hotel connection, free hotspot, etc. that you're on a laptop. So you know for a fact your laptop will connect to the VPN from outside of your home. What sort of internet connection do you have at home? If it's cable, go straight from the cable modem to the laptop. This will remove the Belkin from the loop. If you're able to connect, the problem is in the Belkin. If you are not able to connect, your ISP could be blocking port 1723....however, I doubt that's the case. Nevermind....I know exactly what the issue is. The IP addresses on your home network are probably 192.168.1.x and the office network probably uses 192.168.1.x as well. Set up your home network in your router to run on something like 192.168.2.x. Once those changes go in to place, you should be able to connect. (Hotels and hotspots usually use 10.1.x.x addresses and that's why you're able to connect from another location) If not, let me know. Brian |
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#5
09-29-2008, 11:31 PM
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Quote:
Good catch... |
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#7
10-01-2008, 10:12 AM
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Thanks to all for replies / suggetions but still no dice!
Since initial post (only a couple of days ago - great response time btw!) I have / have done the following: 1. A DSL connection / modem - Speed Stream. ISP advised that as long as I was able to browse / get email there shouldn't be a problem with the VPN! 2. One other issue that may be unrelated but seemed to preceed the VPN not working was that the music share site Limewire stopped working - i.e stopped connecting. This worked fine for a while. Mightbe totally unrelated but seems like there is a similar issue with return authentication / communication from the outside server. I have done the following: 1. Changed my home network from 192.168.2.x to 192.168.1.x - my office is 192.168.2.x. Unfortunately still no luck. 2. Entered port 1723 on my laptop - I am one of those with enough knowledge to be dangerous so I may have done it wrong. Basically in the router settings on my Belkin in Firewall>Virtual Servers I have set the inbound port to 1723 - 1723, Private IP Address to 192.168.1.X where x is my laptop's IP allocated address, private port to 1723-1723 (?) and I made the same entry for both TCP and UDP.......as I said, enough knowledge to be dangerous.... Per questions above also, we are using RRAS on our server at work. There is no error message per se - with the VPN connection set up (that works at a hot spot) it attempts to connect, it indicates connecting to Office VPN then shows "verifying username and password" (that works ok at a hot spot) then fnally omes up with Unable to Connect to Office VPN. There is an option to Diagnose Problem, select yes - Windows cannot find anything wrong with your network connection!! Any thoughts? Should I try a direct connecton to the modem without the router again to rule out the router - the DSL connection is PPPoE. Thanks to all for your help so far...... Jeremy |
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#8
10-01-2008, 01:51 PM
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port 1723 to the laptop?
You did that on your home connection? Port 1723 needs to be forwarded at work, if that's where the RRAS server is. Also, check if there is an option or rule to enable "GRE" protocol in the firewall or port forward setting. If possible, post the model router you have at work (I'm assuming the RRAS server is behind a router and has a NAT IP address). I had the same symptom you are describing, verified username/password but did not connect, turned out I needed to allow GRE to the RRAS server... Info: http://en.wikipedia.org/wiki/Generic..._Encapsulation http://en.wikipedia.org/wiki/PPTP (RRAS by default will use PPTP, if its configured for IPSec, that might require other configurations) http://en.wikipedia.org/wiki/Port_forwarding |
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