VPN Error 800, all of a sudden

Hi all,

recently, my boss reported that VPN didn't work anymore. The scenario
as follows:

XP Client, Windows Server 2003 Small Business Edition

he used to connect through VPN to the company's LAN which worked for
months and now suddenly ceased to.
To identify the problem, I tried to connect from the inside of the LAN
(means: no router, no dyndns, nothing) to the server, still returns
Error 800.

I can ping the server, NSlookup works, Routing&RAS Service is started,
accounts are given the permission to dial-in, no third party firewalls
whatsoever involved.

This problem really appeared out of a sudden, and I don't know what to
do!

Interesting: Doing a portscan, the server doesn't appear to listen on
Port 1723, though it should, as far as I know.

Any help would be greatly appreciated, I'm here for two hours now and
running out of ideas.

Best regards
Flavio

quoted from http://www.ChicagoTech.net
Can't access VPN after installing XP SP2

Cause: the ICF block the VPN traffic.


--
For more and other information, go to http://www.ChicagoTech.net


Don't send e-mail or reply to me except you need consulting services.
Posting on MS newsgroup will benefit all readers and you may get more help.


Robert Lin, MS-MVP, MCSE & CNE

Networking, Internet, Routing, VPN, Anti-Virus, Tips & Troubleshooting on
http://www.ChicagoTech.net
This posting is provided "AS IS" with no warranties.

"Flavio Kaufmann" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) m...
> Hi all,
>
> recently, my boss reported that VPN didn't work anymore. The scenario
> as follows:
>
> XP Client, Windows Server 2003 Small Business Edition
>
> he used to connect through VPN to the company's LAN which worked for
> months and now suddenly ceased to.
> To identify the problem, I tried to connect from the inside of the LAN
> (means: no router, no dyndns, nothing) to the server, still returns
> Error 800.
>
> I can ping the server, NSlookup works, Routing&RAS Service is started,
> accounts are given the permission to dial-in, no third party firewalls
> whatsoever involved.
>
> This problem really appeared out of a sudden, and I don't know what to
> do!
>
> Interesting: Doing a portscan, the server doesn't appear to listen on
> Port 1723, though it should, as far as I know.
>
> Any help would be greatly appreciated, I'm here for two hours now and
> running out of ideas.
>
> Best regards
> Flavio

Error 800 means that you aren't even getting to first base. It's either a
firewall problem as Bob suggested, or your RRAS setup is corrupt.

"Robert L [MS-MVP]" <(E-Mail Removed)> wrote in message
news:%(E-Mail Removed)...
> quoted from http://www.ChicagoTech.net
> Can't access VPN after installing XP SP2
>
> Cause: the ICF block the VPN traffic.
>
>
> --
> For more and other information, go to http://www.ChicagoTech.net
>
>
> Don't send e-mail or reply to me except you need consulting services.
> Posting on MS newsgroup will benefit all readers and you may get more
> help.
>
>
> Robert Lin, MS-MVP, MCSE & CNE
>
> Networking, Internet, Routing, VPN, Anti-Virus, Tips & Troubleshooting on
> http://www.ChicagoTech.net
> This posting is provided "AS IS" with no warranties.
>
> "Flavio Kaufmann" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed) m...
>> Hi all,
>>
>> recently, my boss reported that VPN didn't work anymore. The scenario
>> as follows:
>>
>> XP Client, Windows Server 2003 Small Business Edition
>>
>> he used to connect through VPN to the company's LAN which worked for
>> months and now suddenly ceased to.
>> To identify the problem, I tried to connect from the inside of the LAN
>> (means: no router, no dyndns, nothing) to the server, still returns
>> Error 800.
>>
>> I can ping the server, NSlookup works, Routing&RAS Service is started,
>> accounts are given the permission to dial-in, no third party firewalls
>> whatsoever involved.
>>
>> This problem really appeared out of a sudden, and I don't know what to
>> do!
>>
>> Interesting: Doing a portscan, the server doesn't appear to listen on
>> Port 1723, though it should, as far as I know.
>>
>> Any help would be greatly appreciated, I'm here for two hours now and
>> running out of ideas.
>>
>> Best regards
>> Flavio
>
>