Clean server from port scanner and security issues

My host sent me a warning that my server is doing port scan and attacking other servers and it must be fixed correctly. I haven’t logged on to my server for long time so not sure what’s happening. It’s a voice chat site with active users so you must be very careful. Also there is another issue, site is on SSL certificate , it should forward to https on its own, it hasn’t been working all the times, when a first time user type the url without https it basically give them a white page connection refused, so that need to be fixed as well and any other security issues. I do get daily drops and attacks someone been trying to hack attack daily for more than 2 years. If you do get the project you must take care of all the above issues and monitor the server for 10 days and solve any issues related, if these security issues not solved my host will shit me down .