60 lines
2.6 KiB
Cheetah
60 lines
2.6 KiB
Cheetah
{{- if eq .host.distro.family "linux" -}}
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#!/usr/bin/env bash
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# @file Fail2ban Configuration
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# @brief Applies the system `fail2ban` jail configuration and then restarts the service
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# @description
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# Fail2ban is an SSH security program that temporarily bans IP addresses that could possibly be
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# attempting to gain unauthorized system access. This script applies the "jail" configuration
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# located at `home/private_dot_ssh/fail2ban/` to the system location. It then enables and restarts
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# the `fail2ban` configuration.
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#
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# ## Links
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#
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# * [`fail2ban` configuration folder](https://github.com/megabyte-labs/install.doctor/tree/master/home/private_dot_ssh/fail2ban)
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# jail.local hash: {{- include (joinPath .host.home ".ssh" "fail2ban" "jail.local") | sha256sum -}}
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{{ includeTemplate "universal/profile" }}
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{{ includeTemplate "universal/logg" }}
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### Notify of script start
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logg info 'Configuring fail2ban'
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### Restart fail2ban
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function restartFailToBan() {
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if [ -d /Applications ] && [ -d /System ]; then
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# macOS
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logg info 'Enabling the fail2ban Homebrew service'
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brew services restart fail2ban
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else
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# Linux
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logg info 'Enabling the fail2ban service'
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sudo systemctl enable fail2ban
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logg info 'Restarting the fail2ban service'
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sudo systemctl restart fail2ban
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fi
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}
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### Update the jail.local file if environment is not WSL
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logg info 'Checking if script is being run in WSL environment'
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if [[ ! "$(test -d /proc && grep Microsoft /proc/version > /dev/null)" ]]; then
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if [ -d /etc/fail2ban ]; then
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logg info 'Copying ~/.ssh/fail2ban/jail.local to /etc/fail2ban/jail.local'
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sudo cp -f "$HOME/.ssh/fail2ban/jail.local" /etc/fail2ban/jail.local
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restartFailToBan
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elif [ -d /usr/local/etc/fail2ban ]; then
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logg info 'Copying ~/.ssh/fail2ban/jail.local to /usr/local/etc/fail2ban/jail.local'
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sudo cp -f "$HOME/.ssh/fail2ban/jail.local" /usr/local/etc/fail2ban/jail.local
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restartFailToBan
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elif [ -d "${HOMEBREW_PREFIX:-/opt/homebrew}/etc/fail2ban" ]; then
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logg info "Copying ~/.ssh/fail2ban/jail.local to ${HOMEBREW_PREFIX:-/opt/homebrew}/etc/fail2ban/jail.local"
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sudo cp -f "$HOME/.ssh/fail2ban/jail.local" "${HOMEBREW_PREFIX:-/opt/homebrew}/etc/fail2ban/jail.local"
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restartFailToBan
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else
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logg warn 'The /etc/fail2ban (Linux), the /usr/local/etc/fail2ban, and the ${HOMEBREW_PREFIX:-/opt/homebrew}/etc/fail2ban (macOS) folder do not exist'
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fi
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else
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logg info 'Skipping sshd_config application since environment is WSL'
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fi
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{{ end -}}
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