fix typo

docs/src/operations/best-practices/security.md

@@ -35,7 +35,7 @@ Your system should close all ports that do not need to be open to the outside wo
 
 ## Eliminate Brute Force Attacks With fail2ban
 
-[fail2ban](https://github.com/fail2ban/fail2ban) is a network security tool that checks your logs for suspicious login attempts and bans those IP addresses after repeated attempts. This will help mitigate brute force attacks on your serve.
+[fail2ban](https://github.com/fail2ban/fail2ban) is a network security tool that checks your logs for suspicious login attempts and bans those IP addresses after repeated attempts. This will help mitigate brute force attacks on your server.
 
 The default setup should work out-of-the-box by doing the simply installing `fail2ban`: