linutil/tabs/security/firewall-baselines.sh

#!/bin/sh -e

. ../common-script.sh

installPkg() {
    echo "Installing UFW..."
    if ! command_exists ufw; then
        case "$PACKAGER" in
            pacman)
                $ESCALATION_TOOL "$PACKAGER" -S --needed --noconfirm ufw
                ;;
            *)
                $ESCALATION_TOOL "$PACKAGER" install -y ufw
                ;;
        esac
    else
        echo "UFW is already installed."
    fi
}

configureUFW() {
    printf "%b\n" "${YELLOW}Using Chris Titus Recommended Firewall Rules${RC}"

    printf "%b\n" "${YELLOW}Disabling UFW${RC}"
    $ESCALATION_TOOL ufw disable

    printf "%b\n" "${YELLOW}Limiting port 22/tcp (UFW)${RC}"
    $ESCALATION_TOOL ufw limit 22/tcp

    printf "%b\n" "${YELLOW}Allowing port 80/tcp (UFW)${RC}"
    $ESCALATION_TOOL ufw allow 80/tcp

    printf "%b\n" "${YELLO}Allowing port 443/tcp (UFW)${RC}"
    $ESCALATION_TOOL ufw allow 443/tcp

    printf "%b\n" "${YELLOW}Denying Incoming Packets by Default(UFW)${RC}"
    $ESCALATION_TOOL ufw default deny incoming

    printf "%b\n" "${YELLOW}Allowing Outcoming Packets by Default(UFW)${RC}"
    $ESCALATION_TOOL ufw default allow outgoing

    $ESCALATION_TOOL ufw enable
    printf "%b\n" "${GREEN}Enabled Firewall with Baselines!${RC}"
}

checkEnv
checkEscalationTool
installPkg
configureUFW