I have been searching for a solution to this problem for some time now and have found nothing.

I have a Draytek Vigor 2820 connected to a standard Virgin media cable internet conneciton (Using an NTL250 cable modem)

I can connect to my work VPN if I connect my laptop straight to my cable modem, so I assume that this must be a router issue; however if I plug a USB 3G broadband card into it, then I can VPN through the router with no problems (and no change to configuration).

I have tried forwarding all the VPN ports through the router, VPN passthrough is enabled, I have added my laptops IP Address to the DMZ, reset the router to its default settings and reconfigured it, but no matter what I try it will not connect.

I "connect" to my work VPN using the Windows XP inbuilt VPN Client over IPSec.

When I try to connect it fails at the authentication stage with error 619.

My broadband works fine and has always been fast and reliable, the only thing that I can think of that could have had any effect is that Virgin introduced their "Advanced Network Error Search" (redirects you to a search page if DNS is not resolved); I have opted out from this though, so I have almost ruled out any effect this may have had.

I really would appreciate any help on this as I am really running out of ideas. Thank you in advance for any help offered.

Dave.

I have tried using a Linksys WRT54GL and it connects perfectly first time with very little configuration. All that was required was setting up the WAN connection