We have 2 Windows XP Pro computers on our LAN (and 1 Win7). All 3 computers are configured for remote access. We want to use Trustwave for merchant services. They won't serve us unless we eliminate the possibility of Man in the Middle attacks, and suggest configuring RDP to use SSL. It's my understanding you can't do that in XP Pro. Any suggestions? Can the router's firewall be tweaked to provide that level of security?