oops!
I keep going to this haulage company near the Airport and re-installing their server. I re-install the O/S (which was Win2K adv server) and Citrix, then hand over to the huge office in India, who does the rest.
I've been there three times now, and keep telling them that a Win2K machine with a public IP address, no firewall whatsoever, and the administrator password which is the same as the domain, is going to get broken again very quickly.
So third time now, and we went with Server 2003 instead this time, and they now assure me they'll be putting in a VPN.
At least they pay quickly!!