vpn help needed... really really confused

Hi,

Have been struggling for the past 2 weeks to try and get the vpn working on
sbs 2003 standard edition recently installed.

Problem is when i try to connect to the server over a vpn link the
connection goes through without any problems and the connection dialog box
brings up a message "verifying username and password" and just stays on that
box and then times out with an error 721. Have checked and made sure that my
user account is a member of the mobile users and remote users groups and all
is good at the server end unless i am missing something clearly i must be so
any advice would be gratefully appreciated.

Thanks

Sid

 

Is there an EventID and a Source ?? Would help pinpoint the issue .

 

Hi Sid

Error 721 is always GRE 47 protocol problem on TCP port 1723. Your router is
not passing that. Check with your router vendor to see if a firmware update
is required.

 

Hi Sid,

The 721 error generally is a failure to pass GRE (Protocol 47), and is a not
uncommon issue with SOHO routers (I presume you have one?) See if your
router has a setting for PPTP passthrough, or VPN passthrough. If so,
enable this and the error may go away. You'll likely also have to forward
port 1723 traffic if you haven't already - but I think you have or you
wouldn't have got far enough to get the 721 error.

If the error persists, and/or you can't find such a setting, then post the
make and model of your router - in some cases a firmware upgrade is
required, in other cases some seemingly odd port forwarding (Port 47).