site-to-site VPN Problem

johnny1125 · 03-01-2009, 08:12 PM

Hey all, I am a new guy here.

Recently i got a problem with the PPTP VPN connection
We are using windows server 2003 for the VPN server, and there are total 3 VPN clients that they are all using Windows XP.
All of the 3 clients are at the different location. Because of the server side doesn't have a static IP, we using the "NO-IP" to set up a Domain name for the VPN host name and all of the Client and server is behind a router.
Here is the main problem, when all the 3 clients connect to the server through the VPN tunnel, they can all successfully connect. But after a while, some how they disconnect from the server unexpectedly. And the error message are "Error 800: Unable to establish the VPN connection. The VPN server may be unreachable, or secunity parameters may not be configured properly for this connection."
It look like all of the 3 clients cannot connect to the server at the same time. Can anyone tell me can the windows pptp support the multiple connection? and actually what cause the disconnection?

**bilbus** · 03-02-2009, 06:05 AM

you have desktops connecting to a server via vpn? If so thats not site to site.

You can have tons of pptp connections .. is your ip changing during the connection?

do all 3 clients disconnect when you get that message?

johnny1125 · 03-02-2009, 07:20 PM

Quote:

Originally Posted by bilbus

you have desktops connecting to a server via vpn? If so thats not site to site.

You can have tons of pptp connections .. is your ip changing during the connection?

do all 3 clients disconnect when you get that message?

the ip haven't change, and all 3 clients are not disconnect at the same time when get that message.

johnny1125 · 03-02-2009, 08:11 PM

Is it Okay to use the same login for all 3 clients to connect to the VPN server ?

**djaburg** · 03-03-2009, 10:19 AM

I wouldn't do that, especially via VPN. I'd have each user use their own username and password. Is it possible that your internet connection is causing little drops in connectivity for the remote users? I'd start by looking at what users are doing inside the network to see what kind of bandwidth they're using. I've been amazed how many times remote users complain about their "computers being slow" when in actuality it's local users doing things like streaming video, audio, and large file downloads. Also make sure you check your system logs to see if there is anything in there pointing to a possible cause.

johnny1125 · 03-05-2009, 05:00 AM

now the client can connect to the VPN around 10 - 15 hours after i reboot the router. But after that, they all keep disconnect within 5 mins.

johnny1125 · 03-05-2009, 07:08 AM

After I reboot my router and get a new IP address from my ISP, it can works 10-15 hrs.
But after that, it keep disconnect again and I have to re boot my router
I am confuse, is it the ip address from the ISP expire?

**djaburg** · 03-05-2009, 11:36 AM

What kind of internet service do you have, static or dynamic? What kind of router are you using?

johnny1125 · 03-05-2009, 04:00 PM

it is a dynamic internet service, i'm using linksys wrv200 VPN router

Tom*-* · 03-06-2009, 03:56 AM

I would ast your ISP to get you a static IP, it would make it a great deal easier without it changing all the time and you can usually get them for free

03-01-2009, 08:12 PM	#1 (permalink)
johnny1125 Registered User Join Date: Mar 2009 Posts: 6 OS: XP	site-to-site VPN Problem Hey all, I am a new guy here. Recently i got a problem with the PPTP VPN connection We are using windows server 2003 for the VPN server, and there are total 3 VPN clients that they are all using Windows XP. All of the 3 clients are at the different location. Because of the server side doesn't have a static IP, we using the "NO-IP" to set up a Domain name for the VPN host name and all of the Client and server is behind a router. Here is the main problem, when all the 3 clients connect to the server through the VPN tunnel, they can all successfully connect. But after a while, some how they disconnect from the server unexpectedly. And the error message are "Error 800: Unable to establish the VPN connection. The VPN server may be unreachable, or secunity parameters may not be configured properly for this connection." It look like all of the 3 clients cannot connect to the server at the same time. Can anyone tell me can the windows pptp support the multiple connection? and actually what cause the disconnection?

03-02-2009, 06:05 AM	#2 (permalink)
bilbus TSF Enthusiast Join Date: Aug 2006 Posts: 958 OS: OS2 Warp	Re: site-to-site VPN Problem you have desktops connecting to a server via vpn? If so thats not site to site. You can have tons of pptp connections .. is your ip changing during the connection? do all 3 clients disconnect when you get that message?

03-02-2009, 08:11 PM	#4 (permalink)
johnny1125 Registered User Join Date: Mar 2009 Posts: 6 OS: XP	Re: site-to-site VPN Problem Is it Okay to use the same login for all 3 clients to connect to the VPN server ?

03-03-2009, 10:19 AM	#5 (permalink)
djaburg TSF Enthusiast Join Date: May 2008 Posts: 1,326 OS: XP SP3/Vista/7 Server 2K/2K3/2K8	Re: site-to-site VPN Problem I wouldn't do that, especially via VPN. I'd have each user use their own username and password. Is it possible that your internet connection is causing little drops in connectivity for the remote users? I'd start by looking at what users are doing inside the network to see what kind of bandwidth they're using. I've been amazed how many times remote users complain about their "computers being slow" when in actuality it's local users doing things like streaming video, audio, and large file downloads. Also make sure you check your system logs to see if there is anything in there pointing to a possible cause. __________________ Computers make it easier to do a lot of things, but most of the things they make it easier to do don't need to be done. The inherent vice of capitalism is the uneven division of blessings, while the inherent virtue of socialism is the equal division of misery.

03-05-2009, 05:00 AM	#6 (permalink)
johnny1125 Registered User Join Date: Mar 2009 Posts: 6 OS: XP	Re: site-to-site VPN Problem now the client can connect to the VPN around 10 - 15 hours after i reboot the router. But after that, they all keep disconnect within 5 mins.

03-05-2009, 07:08 AM	#7 (permalink)
johnny1125 Registered User Join Date: Mar 2009 Posts: 6 OS: XP	Re: site-to-site VPN Problem After I reboot my router and get a new IP address from my ISP, it can works 10-15 hrs. But after that, it keep disconnect again and I have to re boot my router I am confuse, is it the ip address from the ISP expire?

03-05-2009, 11:36 AM	#8 (permalink)
djaburg TSF Enthusiast Join Date: May 2008 Posts: 1,326 OS: XP SP3/Vista/7 Server 2K/2K3/2K8	Re: site-to-site VPN Problem What kind of internet service do you have, static or dynamic? What kind of router are you using? __________________ Computers make it easier to do a lot of things, but most of the things they make it easier to do don't need to be done. The inherent vice of capitalism is the uneven division of blessings, while the inherent virtue of socialism is the equal division of misery.

03-05-2009, 04:00 PM	#9 (permalink)
johnny1125 Registered User Join Date: Mar 2009 Posts: 6 OS: XP	Re: site-to-site VPN Problem it is a dynamic internet service, i'm using linksys wrv200 VPN router

03-06-2009, 03:56 AM	#10 (permalink)
Tom- Registered User Join Date: Mar 2009 Posts: 5 OS: Vista	Re: site-to-site VPN Problem I would ast your ISP to get you a static IP, it would make it a great deal easier without it changing all the time and you can usually get them for free