hello sir,
I studied the admin system, I have the experience in securing servers.
I will install Failtoban firewall to accept only connection from specific ports, I will also configure it to protect you from Dos attacks.
I will also secure your ssh, and protect your server from ssh Bruteforce attacks.
I am ready to start immediately, I hope to choose me, you will be so satisfied.
(it will cost you just 70$ because I want to get more reviews to my profile in this field).