Just checking the websites for software updates as I usually do and it appears that Ubiquiti Networks has pushed out an update for their UniFi controller, UniFi v4.8.12 Controller, which also includes bundled as part of the download firmware updates for both the UniFi Security Gateway (USG) and UniFi AP AC with everything turning out great although some of the settings were lost during the firmware upgrade such as the mDNS settings which allow for auto discovery along side uPnP which is used for applications that require an open port and the router automatically deals with the details – Transmission, Skype etc. take advantage of it. Everything so far is going well – no instability, the Ubuntu Linux distribution that the USG uses is Debian which has been updated to ‘Wheezy’ which is Debian 7.9 along with some custom patches they add to their firmware update.
On a good side, every since moving to BigPipe the need to have vlan tagging has gone since all you need to do is setup a PPPoE connection with BigPipe for the username and password then everything works rather than precarious dance which requires me logging into the router via an SSH session to manually setup the connection. The connection so far has been pretty stable and the firewall used has done a good job so far when it comes to protecting me from the nasties out on the internet – hackers, crackers and other annoying folks.
Edit (6/2/2016) – Here is a screenshot of the WAN configuration: