I am a network consultant and several of my clients want me to connect to their servers and make sure everything is up to date and working properly (ie. backups, WSUS, antivirus, ect...). What is a free or inexpensive way of connecting to their network or server? i am looking for something like GOTOMYPC but without the expensive price. or something like VNC would likely work, but i dont want to open ports on the firewall and have them be accessable to the public. so if i do go with VNC, i would need to implement some kind of VPN software to make it secure. i am anticipating implementing this on about 25 clients or so to begin with.