mirror of
https://github.com/NixOS/nixpkgs.git
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86 lines
1.7 KiB
Bash
Executable File
86 lines
1.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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# Detect if iptables or nftables-based firewall is used.
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if [[ -e /etc/systemd/system/firewall.service ]]; then
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BACKEND=iptables
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elif [[ -e /etc/systemd/system/nftables.service ]]; then
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BACKEND=nftables
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else
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echo "nixos-firewall-tool: cannot detect firewall backend" >&2
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exit 1
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fi
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ip46tables() {
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iptables -w "$@"
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ip6tables -w "$@"
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}
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show_help() {
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echo "nixos-firewall-tool"
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echo ""
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echo "Can temporarily manipulate the NixOS firewall"
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echo ""
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echo "Open TCP port:"
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echo " nixos-firewall-tool open tcp 8888"
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echo ""
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echo "Show all firewall rules:"
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echo " nixos-firewall-tool show"
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echo ""
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echo "Open UDP port:"
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echo " nixos-firewall-tool open udp 51820"
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echo ""
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echo "Reset firewall configuration to system settings:"
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echo " nixos-firewall-tool reset"
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}
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if [[ -z ${1+x} ]]; then
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show_help
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exit 1
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fi
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case $1 in
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"open")
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protocol="$2"
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port="$3"
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case $BACKEND in
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iptables)
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ip46tables -I nixos-fw -p "$protocol" --dport "$port" -j nixos-fw-accept
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;;
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nftables)
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nft add element inet nixos-fw "temp-ports" "{ $protocol . $port }"
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;;
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esac
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;;
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"show")
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case $BACKEND in
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iptables)
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ip46tables --numeric --list nixos-fw
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;;
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nftables)
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nft list table inet nixos-fw
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;;
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esac
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;;
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"reset")
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case $BACKEND in
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iptables)
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systemctl restart firewall.service
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;;
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nftables)
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nft flush set inet nixos-fw "temp-ports"
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;;
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esac
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;;
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-h|--help|help)
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show_help
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exit 0
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;;
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*)
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show_help
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exit 1
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;;
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esac
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