Hello,
I can start now for your job Bandwith Optimization for VOIP ( SBO ) with vpn tunneling and also Intercalling, and i am expert linux ubuntu 14.04.1 lts trusty tahr system admin & i am using computer as professional from 2010 for linux development, network solutions, webmastering & software engineering stack. i am the freelancer that you are looking for!
kind regards,
jamil
your freelancer support specialisth