install.fairie/docs/scripts/after/run_onchange_after_31-fail2ban.sh.tmpl.md

title	description	sidebar_label	slug	githubLocation	scriptLocation	repoLocation
Fail2ban Configuration	Applies the system `fail2ban` jail configuration and then restarts the service	31 Fail2ban Configuration	/scripts/after/run_onchange_after_31-fail2ban.sh.tmpl	https://github.com/megabyte-labs/install.doctor/blob/master/home/.chezmoiscripts/universal/run_onchange_after_31-fail2ban.sh.tmpl	https://github.com/megabyte-labs/install.doctor/raw/master/home/.chezmoiscripts/universal/run_onchange_after_31-fail2ban.sh.tmpl	home/.chezmoiscripts/universal/run_onchange_after_31-fail2ban.sh.tmpl

Fail2ban Configuration

Applies the system fail2ban jail configuration and then restarts the service

Overview

Fail2ban is an SSH security program that temporarily bans IP addresses that could possibly be attempting to gain unauthorized system access. This script applies the "jail" configuration located at home/private_dot_ssh/fail2ban/ to the system location. It then enables and restarts the fail2ban configuration.

Links

• fail2ban configuration folder

Source Code

{{- if eq .host.distro.family "linux" -}}
#!/usr/bin/env bash
# @file Fail2ban Configuration
# @brief Applies the system `fail2ban` jail configuration and then restarts the service
# @description
#     Fail2ban is an SSH security program that temporarily bans IP addresses that could possibly be
#     attempting to gain unauthorized system access. This script applies the "jail" configuration
#     located at `home/private_dot_ssh/fail2ban/` to the system location. It then enables and restarts
#     the `fail2ban` configuration.
#
#     ## Links
#
#     * [`fail2ban` configuration folder](https://github.com/megabyte-labs/install.doctor/tree/master/home/private_dot_ssh/fail2ban)

# jail.local hash: {{- include (joinPath .host.home ".ssh" "fail2ban" "jail.local") | sha256sum -}}

{{ includeTemplate "universal/profile" }}
{{ includeTemplate "universal/logg" }}

### Restart fail2ban
function restartFail2Ban() {
    if [ -d /Applications ] && [ -d /System ]; then
        # macOS
        logg info 'Enabling the fail2ban Homebrew service'
        brew services start fail2ban
    else
        # Linux
        logg info 'Enabling the fail2ban service'
        sudo systemctl enable fail2ban
        logg info 'Restarting the fail2ban service'
        sudo systemctl restart fail2ban
    fi
}

### Update the jail.local file if environment is not WSL
if [[ ! "$(test -d /proc && grep Microsoft /proc/version > /dev/null)" ]]; then
    if [ -d /etc/fail2ban ]; then
        logg info 'Copying ~/.ssh/fail2ban/jail.local to /etc/fail2ban/jail.local'
        sudo cp -f "$HOME/.ssh/fail2ban/jail.local" /etc/fail2ban/jail.local
        restartFail2Ban
    elif [ -d /usr/local/etc/fail2ban ]; then
        logg info 'Copying ~/.ssh/fail2ban/jail.local to /usr/local/etc/fail2ban/jail.local'
        sudo cp -f "$HOME/.ssh/fail2ban/jail.local" /usr/local/etc/fail2ban/jail.local
        restartFail2Ban
    else
        logg warn 'Both the /etc/fail2ban (Linux) and the /usr/local/etc/fail2ban (macOS) folder do not exist'
    fi
else
    logg info 'Skipping sshd_config application since environment is WSL'
fi

{{ end -}}