Finish configuring linux server with PFsense and Cpanel

Server already Online, IT guy who was working on it did not finish it,so it needs to be fixed and finished. currently Cpanel is installed but not configured so it doesnt work i think, PFsense needs to be tweaked and monitored so it doe not interfere with clean traffic,keep inmind that server constantly get attacked so a perfect firewall is a MUST as its a chat site and will always get DDos ,currently when it gets attacked i get 502 badgateway so users cant get in, that needs to be fixed . basically the guy did 2 virtual machines, one for the chat server and the other is wordpress site,for security purposes i believe, when server gets attacked i think they attack the server with wp site as chat still works when they attack. cpanel isnt configured , ftp isnt configured,mail isnt configured, all need to be fixed and configured with rules and all. also you must monitor the preformance and provide support for 30 days,specially when an attack happens or there is a problem with the firewall. by the end of project you must provide me a document of what have been done and to teach me how to deal with the firewall to check if there are issues. keep in mind security and DDOS is a priority . Money will only be released when project and support is completed,sorry i have had bad experience with other freelancers in the past. Keep in mind that site is Live so you must do that while keeping it live online and make sure you backup everything incase of issues.