It's a *really* bad idea to connect any Officeserv to the public internet:

1. You can crash them by doing a port scan (using Nmap or similar)

2. You can telnet into them using the root account, or admin account if you haven't changed it's password

(I've tried this on 7030s and 7100s with MP10 upto 4.46e)

Unlike the old DCS/iDCS systems the Officeserv systems are linux servers with some special telephony peripherals so network security shouldn't be treated differently to any other servers.