Stay away from suspicious access with fail2ban
A number of suspicious access to Linux servers happens on the Internet every day. Fail2ban is software to protect Linux
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Install Jailkit on Ubuntu
If you would like to chroot ssh user, you may installed Jailkit. It is not available on Ubuntu software repos
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On internet, sometimes some unknown bots / hackers are trying to login any email / FTP servers available on Internet.
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