asterisk trixbox system to be secured /hardened/inspected /

I have a budget of $100 and potentially more work .I'm a voip consultant I know enough to help I just need some expert push on this one of my clients I relaxed on the security aspect 1- I need a trixbox system inspected for potential hacked and harden it for security. Secure system. guarantee for 30 days that attacks are locked I saw someone trying to connect from china so we can lock out the whole country as this is used in USA mostly. 2- We will be working one on one I m a voip consultant too I just need help to make sure that the system is secured and no one externally can access my system. I will provide a showmypc or teamviewer also we will use skype for copy paste if need be we will be working one on one I believe 1 to 2 hours or 3 max will do the magic. 3- Also I would like to to connect the system to a web domain https: using ari to log on and check logs through a website. I envision a section where it will say log on and user name and password and they will log on to ari . In free pbx when I create an extension I need one more option to show delete option or not in ari. clarification ( I would like in ARI to have the delete checkbox column hidden for certain extensions to be controlled in the admin area in Freepbx the extension section I imagine having a check box saying allow extension user to not delete log entried > if checked the column in ari will be hidden for that extension. ) My box is at my home in a 10mb up and 10 mb down speed so i need to ensure that we open one port to communicate and is secure no one can hack.