to do remote system administration i use webmin. it runs on port 10000 by
default and if you forward requests for port 10000 to the computer running
webmin you can tweak server settings from anywhere. to be secure though
i only allowed 2 remote computers access to the webmin port. Webmin
also has the ability to find other computers on the network running webmin
but i have never had webmin running on 2 computers on 1 network so I dont
know what happens after it finds other computers running webmin but im
guessing you can control those too. you may want to read up on what
webmin can do but for me its perfect, you can upload files, change any
server settings you want (DHCP, HTTP, Sendmain (or postscrit), MYSQL...
almost any server you can think of). you can can add, delete, modify
users. And there are 3rd party modules that you can add. It's powerful
stuff.
http://webmin.com