Security
Network
whatip: AUR: Gtk application to get info on your ip.
sshguard: Brute force detector for ssh, exim, vsftpd and more; blocks by ip with iptables.
ssh-audit: SSH config auditor.
Privelage
doas: Portable version of OpenBSD’s doas command, known for being substantially smaller in size compared to sudo while pursuing the same goal of running command.
sudo: Command to delegate the ability to run commands as root or another user while providing an audit trail.
polkit-fakesudo: AUR: Wrapper for polkit that emulates sudo
Audit
rkhunter: Checks for presence of rootkits.
lynis: System auditing tool with tips on hardening your system.