Openssl vulnerability fix and network tools in v5.7.4

Heartbleed openssl vulnerability fix

Network Tools in Appliance manager

Network Info via Appliance Manager

Follow flag in the Device API

ifAlias vs ifDescription for switch port description via auto-discovery

New filters for History page

API Changes

Known Bugs

Details: http://blog.device42.com/2014/04/openssl-vulnerability-fix-and-network-tools-in-v5-7-4/