They are more or less all the same, the unit runs a little web server so if you connect to it you get a web page. Hopefully passworded before you get anywhere.
For extra security, I would not allow access to the webserver via the "standard method" on standard ports 80 & 443. Instead use something like 1080 and 1443..
Do you know if your internet at work has a STATIC IP? if not you will need a router capable of doing dyndns.
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