Hi @eva2000 & All Fellow Member, A few days ago, I got an email from my server provider, SYS, that my server is doing a spam. When I checked on the server that was true. The load average is very high that reached 100 load average. I noticed that there is a security breach to my server that I don't know how which using my server for mass email spamming. Finally, I used ClamAV to scan and remove the malware. I don't know if this is a centmin security hole or else, but can somebody please help me for any link of a tutorial step by step to secure my server, so it won't happen anymore. Please advice and really appreciate any help given. Thank you.