[meta] Divide et impera

[matze]

Since we now have a set of in-house IT and infrastructure resources, we should improve on our internal network's security. Because we maintain a pretty open, bring-your-own-device like policy, we have decided to divide our internal network into three arrays, one being closed for non-IT devices and the other two optimized for their respective clients.

This ticket here serves as a meta-ticket. @fred and @matze will create further ones aligned with the tasks that are to be done.

Overview

Ticket	Status	Resolution	Summary	Component	Owner
#1916	closed	fixed	Cleanup of DHCP Static Mappings on firewall	Office-IT	fred
#1962	closed	fixed	Develop a new network scheme	Office-IT	fred
#1963	closed	fixed	Verify network links	Office-IT	fred
#1964	closed	fixed	Verify office hosts	Office-IT	fred
#2089	closed	fixed	Create redundant Firewall setup	Office-IT	fred
#2421	closed	fixed	Setup new office network switch	Office-IT	fred
#2453	closed	fixed	Move internal servers' IPs into secure Subnet	Office-IT	fred
#2454	new		Rename office network hosts according to naming scheme	Unknown
#2455	closed	fixed	Move DECT phone system into secure subnet	Office-IT	fred
#2842	closed	fixed	Setup separate virtual WLANs	Office-IT