Firewall-Check fuer den Dashboard-Port einbauen
- firewall-check.sh (auch ./setup.sh firewall): prueft Listener, Container- Portweiterleitung (DNAT), ip_forward, firewalld, ufw/ufw-docker, iptables (INPUT, DOCKER-USER), natives nftables, CSF, Shorewall und lokalen HTTPS-Test - Legt fehlende Regeln an (Rueckfrage, --yes ohne, --check nur pruefen); Podman: podman network reload --all bei fehlender Weiterleitung - Erkennt "TCP offen, aber kein HTTPS" (conmon haelt Port nur reserviert) - setup.sh: kein firewall-cmd --reload mehr (loescht ggf. Container-Regeln), up ruft stattdessen den Firewall-Check auf - README: Abschnitt Firewall-Check Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
This commit is contained in:
duffyduck
co-authored by
Claude Opus 5.5
Claude Opus 5.5
parent
e6aad53fb5
commit
174c10505a
Executable
+332
@@ -0,0 +1,332 @@
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#!/bin/bash
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# Prueft, warum ein veroeffentlichter Port (Standard: Dashboard-Port aus .env) von aussen
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# nicht erreichbar ist, und legt auf Wunsch die fehlende Regel an.
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#
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# sudo ./firewall-check.sh pruefen, bei Problemen nachfragen
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# sudo ./firewall-check.sh --yes pruefen und Regeln ohne Rueckfrage anlegen
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# ./firewall-check.sh --check nur pruefen, nichts aendern
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# ./firewall-check.sh --port 8443 anderen Port pruefen
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# ./firewall-check.sh --port 8080 --tcp Dienst ohne HTTPS (nur TCP-Verbindung pruefen)
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#
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# Erkennt: firewalld (RHEL/Fedora), ufw (Ubuntu/Debian), iptables (legacy und nft),
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# natives nftables, Docker-Ketten (DOCKER-USER, ufw-docker), Podman/netavark, CSF, Shorewall.
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# Prueft ausserdem: lauscht etwas auf dem Port, Portweiterleitung (DNAT) des Containers
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# vorhanden, net.ipv4.ip_forward, lokale Erreichbarkeit.
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set -uo pipefail
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cd "$(dirname "$0")"
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PORT=""
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MODE=ask # ask | yes | check
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TCP_ONLY=0 # 1 = keine HTTPS-Antwort erwarten
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for a in "$@"; do
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case "$a" in
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--yes|-y) MODE=yes ;;
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--check) MODE=check ;;
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--tcp) TCP_ONLY=1 ;;
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--port=*) PORT="${a#--port=}" ;;
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--port) shift_next=1 ;;
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-h|--help) sed -n '2,15p' "$0"; exit 0 ;;
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*) if [ "${shift_next:-0}" = 1 ]; then PORT="$a"; shift_next=0; else echo "Unbekannte Option: $a" >&2; exit 2; fi ;;
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esac
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done
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[ -n "$PORT" ] || PORT=$(grep '^DASHBOARD_PORT=' .env 2>/dev/null | cut -d= -f2-)
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PORT=${PORT:-443}
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[[ $PORT =~ ^[0-9]+$ ]] || { echo "Ungueltiger Port: $PORT" >&2; exit 2; }
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[ "$MODE" = ask ] && [ ! -t 0 ] && MODE=check # ohne Terminal nie ungefragt aendern
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ok() { echo -e " \e[1;32mOK\e[0m $*"; }
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bad() { echo -e " \e[1;31mPROBLEM\e[0m $*"; }
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note() { echo -e " \e[1;33mHINWEIS\e[0m $*"; }
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head_() { echo -e "\n\e[1m$*\e[0m"; }
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have() { command -v "$1" >/dev/null 2>&1; }
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is_root() { [ "$(id -u)" -eq 0 ]; }
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FIX_DESC=()
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FIX_CMD=()
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add_fix() { FIX_DESC+=("$1"); FIX_CMD+=("$2"); }
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PROBLEMS=0
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problem() { bad "$*"; PROBLEMS=$((PROBLEMS + 1)); }
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echo -e "\e[1mFirewall-Check fuer TCP-Port $PORT\e[0m"
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is_root || note "Nicht als root: iptables/nftables/ufw lassen sich nicht auslesen. Fuer den vollen Check: sudo $0"
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# ---------------------------------------------------------------------------
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head_ "1. Lauscht etwas auf Port $PORT?"
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LISTEN=$(ss -Hltnp "sport = :$PORT" 2>/dev/null)
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if [ -z "$LISTEN" ]; then
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problem "Nichts lauscht auf Port $PORT. Laeuft der Stack? (./setup.sh ps)"
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else
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ok "$(echo "$LISTEN" | awk '{print $4}' | sort -u | tr '\n' ' ')"
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echo "$LISTEN" | grep -q 'users:' && echo " Prozess: $(echo "$LISTEN" | grep -o 'users:(([^)]*' | head -1 | cut -c9-)"
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if echo "$LISTEN" | awk '{print $4}' | grep -qvE '^(127\.|\[::1\])'; then :; else
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problem "Port lauscht nur auf localhost - in docker-compose.yml/.env den Port ohne 127.0.0.1 veroeffentlichen"
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fi
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fi
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# ---------------------------------------------------------------------------
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head_ "2. Container und Portweiterleitung"
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ENGINE=""; CPORT=""
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for e in podman docker; do
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have "$e" || continue
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"$e" --version 2>/dev/null | grep -qi podman && [ "$e" = docker ] && continue # podman-docker-Wrapper
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line=$("$e" ps --format '{{.Names}} {{.Ports}}' 2>/dev/null | grep -E ":$PORT->[0-9]+/tcp" | head -1)
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if [ -n "$line" ]; then
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ENGINE=$e
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CPORT=$(echo "$line" | grep -oE ":$PORT->[0-9]+" | head -1 | cut -d'>' -f2)
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ok "$e-Container ${line%% *} veroeffentlicht $PORT -> $CPORT"
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break
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fi
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done
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[ -z "$ENGINE" ] && note "Kein Docker/Podman-Container mit Port $PORT gefunden (anderer Dienst oder fehlende Rechte)"
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dnat_present() {
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{ iptables-save -t nat 2>/dev/null; ip6tables-save -t nat 2>/dev/null; nft list ruleset 2>/dev/null; } |
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grep -E -- "(--dport|dport) $PORT\b" | grep -qi 'dnat'
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}
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if [ -n "$ENGINE" ] && is_root; then
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if dnat_present; then
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ok "Portweiterleitung (DNAT) fuer $PORT ist vorhanden"
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elif [ "$ENGINE" = podman ] && podman info --format '{{.Host.NetworkBackend}}' 2>/dev/null | grep -q netavark; then
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problem "Podman/netavark-Portweiterleitung fehlt - typisch nach 'firewall-cmd --reload' oder Firewall-Neustart"
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add_fix "Podman-Netzregeln neu laden (podman network reload --all)" "podman network reload --all"
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elif [ "$ENGINE" = docker ]; then
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problem "Docker-Portweiterleitung fehlt - typisch nach Firewall-Neustart/-Reload ohne Docker-Neustart"
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note "Behebung: systemctl restart docker (startet ALLE Container neu, daher nicht automatisch)"
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fi
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fi
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# ---------------------------------------------------------------------------
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head_ "3. IP-Forwarding (fuer Container-Ports noetig)"
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if [ "$(cat /proc/sys/net/ipv4/ip_forward 2>/dev/null)" = 1 ]; then
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ok "net.ipv4.ip_forward = 1"
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elif [ -n "$ENGINE" ]; then
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problem "net.ipv4.ip_forward = 0 - weitergeleitete Pakete zum Container werden verworfen"
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add_fix "IP-Forwarding einschalten (dauerhaft in /etc/sysctl.d/99-wazuh-forward.conf)" \
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"echo 'net.ipv4.ip_forward=1' > /etc/sysctl.d/99-wazuh-forward.conf && sysctl -q -w net.ipv4.ip_forward=1"
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else
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note "net.ipv4.ip_forward = 0 (nur fuer Container-Ports relevant)"
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fi
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# ---------------------------------------------------------------------------
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head_ "4. Firewalls"
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FOUND_FW=0
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# --- firewalld (RHEL, Fedora, CentOS, SUSE) ---
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if have firewall-cmd && firewall-cmd --state >/dev/null 2>&1; then
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FOUND_FW=1
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IFACE=$(ip route show default 2>/dev/null | awk '{for(i=1;i<NF;i++) if($i=="dev") print $(i+1)}' | head -1)
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ZONE=$(firewall-cmd --get-zone-of-interface="$IFACE" 2>/dev/null || firewall-cmd --get-default-zone)
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allowed=no
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firewall-cmd --zone="$ZONE" --query-port="$PORT/tcp" >/dev/null 2>&1 && allowed=port
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if [ "$allowed" = no ]; then
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for svc in $(firewall-cmd --zone="$ZONE" --list-services 2>/dev/null); do
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firewall-cmd --info-service="$svc" 2>/dev/null | grep -E '^\s+ports:' | grep -qw "$PORT/tcp" && { allowed="Dienst $svc"; break; }
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done
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fi
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target=$(firewall-cmd --permanent --zone="$ZONE" --get-target 2>/dev/null)
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[ "$allowed" = no ] && [ "$target" = ACCEPT ] && allowed="Zone-Target ACCEPT"
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if [ "$allowed" = no ] && [ -n "$ENGINE" ] && is_root &&
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nft list chain inet firewalld filter_FORWARD 2>/dev/null | grep -q 'ct status dnat accept'; then
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allowed="Container-Port: firewalld laesst per DNAT weitergeleitete Verbindungen durch"
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fi
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if [ "$allowed" != no ]; then
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ok "firewalld aktiv, Zone '$ZONE' (Interface ${IFACE:-?}): $PORT/tcp erlaubt ($allowed)"
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else
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problem "firewalld aktiv, Zone '$ZONE' (Interface ${IFACE:-?}) erlaubt $PORT/tcp nicht"
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# Runtime + permanent ohne --reload: ein Reload wuerde die Podman/Docker-Regeln loeschen
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add_fix "firewalld: $PORT/tcp in Zone '$ZONE' freigeben (sofort + dauerhaft, ohne Reload)" \
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"firewall-cmd -q --zone='$ZONE' --add-port=$PORT/tcp && firewall-cmd -q --permanent --zone='$ZONE' --add-port=$PORT/tcp"
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fi
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elif have firewall-cmd; then
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note "firewalld installiert, aber nicht aktiv"
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fi
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# --- ufw (Ubuntu, Debian) ---
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if have ufw && is_root && ufw status 2>/dev/null | grep -q '^Status: active'; then
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FOUND_FW=1
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if ufw status verbose | grep -q 'Default:.*allow (incoming)'; then
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ok "ufw aktiv, eingehend standardmaessig erlaubt"
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elif ufw status | grep -qE "^$PORT(/tcp)?[[:space:]]+(ALLOW|LIMIT)"; then
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ok "ufw aktiv, Regel fuer $PORT/tcp vorhanden"
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else
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problem "ufw aktiv und keine ALLOW-Regel fuer $PORT/tcp"
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add_fix "ufw: $PORT/tcp erlauben" "ufw allow $PORT/tcp comment 'Wazuh Dashboard'"
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fi
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# ufw-docker: filtert Container-Verkehr ueber DOCKER-USER -> braucht "ufw route allow"
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if [ -n "$CPORT" ] && iptables -S DOCKER-USER 2>/dev/null | grep -q 'ufw-user-forward'; then
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if ufw status | grep -qE "^$CPORT/tcp.*ALLOW FWD"; then
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ok "ufw-docker: Weiterleitung auf Container-Port $CPORT erlaubt"
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else
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problem "ufw-docker aktiv, Weiterleitung auf Container-Port $CPORT nicht erlaubt"
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add_fix "ufw-docker: Weiterleitung auf Container-Port $CPORT erlauben" \
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"ufw route allow proto tcp from any to any port $CPORT"
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fi
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fi
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elif have ufw && ! is_root; then
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note "ufw installiert - Status nur als root lesbar"
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fi
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# --- CSF (ConfigServer Firewall, cPanel/Plesk-Server) ---
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if [ -f /etc/csf/csf.conf ]; then
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FOUND_FW=1
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if grep -E '^TCP_IN\s*=' /etc/csf/csf.conf | grep -qE "[\",]$PORT[\",]"; then
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ok "CSF: $PORT in TCP_IN"
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else
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problem "CSF installiert, $PORT fehlt in TCP_IN (/etc/csf/csf.conf)"
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note "CSF selbst eintragen und 'csf -r' ausfuehren; danach Container-Regeln neu laden (Docker/Podman neu starten bzw. podman network reload --all)"
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fi
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fi
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# --- Shorewall ---
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if have shorewall && shorewall status >/dev/null 2>&1; then
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FOUND_FW=1
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note "Shorewall aktiv: Regel in /etc/shorewall/rules anlegen, z.B. 'ACCEPT net \$FW tcp $PORT', dann 'shorewall reload'"
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fi
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# --- iptables (nur wenn kein Frontend die Regeln verwaltet) ---
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if is_root && have iptables && [ "$FOUND_FW" = 0 ]; then
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INPUT=$(iptables -S INPUT 2>/dev/null)
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input_accepts() {
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echo "$INPUT" | grep -E -- '-j ACCEPT' | grep -E -- "--dport $PORT\b|--dports [0-9,:]*\b$PORT\b" | grep -qv -- '-s '
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}
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if echo "$INPUT" | grep -qE '^-P INPUT (DROP|REJECT)' || echo "$INPUT" | grep -qE '^-A INPUT -j (DROP|REJECT)'; then
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FOUND_FW=1
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if input_accepts; then
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ok "iptables INPUT: restriktiv, aber $PORT/tcp erlaubt"
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else
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problem "iptables INPUT verwirft standardmaessig und hat keine ACCEPT-Regel fuer $PORT/tcp"
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add_fix "iptables: ACCEPT-Regel fuer $PORT/tcp in INPUT einfuegen" \
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"iptables -I INPUT -p tcp --dport $PORT -m conntrack --ctstate NEW -j ACCEPT"
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fi
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else
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ok "iptables INPUT: kein generelles DROP/REJECT"
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fi
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# Eigene Sperren in DOCKER-USER (gelten fuer alle Container-Ports)
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if [ "$ENGINE" = docker ] && iptables -S DOCKER-USER 2>/dev/null | grep -qE -- '-j (DROP|REJECT)'; then
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FOUND_FW=1
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if iptables -S DOCKER-USER | grep -E -- '-j (ACCEPT|RETURN)' | grep -q -- "--ctorigdstport $PORT"; then
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ok "DOCKER-USER: Sperrregeln vorhanden, $PORT ausgenommen"
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else
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problem "DOCKER-USER enthaelt DROP/REJECT-Regeln ohne Ausnahme fuer $PORT"
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add_fix "DOCKER-USER: Ausnahme fuer Host-Port $PORT einfuegen" \
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"iptables -I DOCKER-USER -p tcp -m conntrack --ctorigdstport $PORT --ctdir ORIGINAL -j ACCEPT"
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fi
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fi
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fi
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# --- natives nftables (eigene Tabellen, nicht firewalld/docker/netavark/iptables-nft) ---
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if is_root && have nft && have python3; then
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NFT_CHAINS=$(nft -j list ruleset 2>/dev/null | python3 -c '
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import json, sys
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port = sys.argv[1]
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own = {"firewalld", "netavark"}
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iptables_compat = {"nat", "filter", "mangle", "raw", "security"} # von iptables-nft angelegt
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try:
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data = json.load(sys.stdin)["nftables"]
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except Exception:
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sys.exit(0)
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chains, rules = {}, {}
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for item in data:
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if "chain" in item:
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c = item["chain"]
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if c.get("hook") != "input" or c.get("type") != "filter" or c["table"] in own:
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continue
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if c["family"] in ("ip", "ip6") and c["table"] in iptables_compat:
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continue
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if True:
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chains[(c["family"], c["table"], c["name"])] = c.get("policy", "accept")
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elif "rule" in item:
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r = item["rule"]
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rules.setdefault((r["family"], r["table"], r["chain"]), []).append(json.dumps(r["expr"]))
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for key, policy in chains.items():
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body = rules.get(key, [])
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has_drop = policy == "drop" or any(("\"drop\"" in e or "\"reject\"" in e) and "\"match\"" not in e for e in body)
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allows = any("\"accept\"" in e and "\"dport\"" in e and (f": {port}}}" in e or f", {port}," in e or f"[{port}," in e or f", {port}]" in e) for e in body)
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print(" ".join(key), "drop" if has_drop else "accept", "allow" if allows else "noallow")
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' "$PORT")
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while read -r fam tbl chain pol allow; do
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[ -n "$fam" ] || continue
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FOUND_FW=1
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if [ "$pol" = accept ]; then
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ok "nftables $fam $tbl/$chain: verwirft nicht generell"
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elif [ "$allow" = allow ]; then
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ok "nftables $fam $tbl/$chain: $PORT/tcp erlaubt"
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else
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problem "nftables $fam $tbl/$chain verwirft eingehend und erlaubt $PORT/tcp nicht"
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add_fix "nftables: '$PORT/tcp accept' am Anfang von $fam $tbl/$chain einfuegen" \
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"nft insert rule $fam $tbl $chain tcp dport $PORT accept"
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NFT_PERSIST=1
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fi
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done <<< "$NFT_CHAINS"
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fi
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if [ "$FOUND_FW" = 0 ]; then
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if is_root; then ok "Keine aktive Host-Firewall gefunden, die eingehend blockiert"
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else note "Ohne root nicht vollstaendig pruefbar (iptables/nftables/ufw)"; fi
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fi
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# ---------------------------------------------------------------------------
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head_ "5. Lokaler Verbindungstest"
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probe() { # probe HOST -> "HTTP <code>" | "TCP offen" | leer
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local code=""
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have curl && code=$(curl -sk --max-time 5 -o /dev/null -w '%{http_code}' "https://$1:$PORT/" 2>/dev/null)
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if [ -n "$code" ] && [ "$code" != 000 ]; then echo "HTTP $code"; return; fi
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timeout 5 bash -c "exec 3<>/dev/tcp/$1/$PORT" 2>/dev/null && echo "TCP offen, aber keine HTTPS-Antwort"
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}
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MYIP=$(ip route get 1.1.1.1 2>/dev/null | awk '{for(i=1;i<NF;i++) if($i=="src") print $(i+1)}' | head -1)
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for h in 127.0.0.1 $MYIP; do
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res=$(probe "$h")
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if [ -z "$res" ]; then
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problem "$h:$PORT nicht erreichbar"
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elif [[ $res == TCP* ]] && [ "$TCP_ONLY" = 0 ]; then
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# conmon (Podman) bzw. docker-proxy halten den Port offen, auch wenn dahinter nichts ankommt
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problem "$h:$PORT nimmt Verbindungen an, liefert aber kein HTTPS - Port nur reserviert (Weiterleitung kaputt?) oder Dashboard startet noch"
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else
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ok "$h:$PORT erreichbar ($res)"
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fi
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done
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note "Lokal erreichbar heisst noch nicht von aussen. Von einem anderen Rechner: curl -kI https://${MYIP:-<server-ip>}:$PORT"
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note "Ausserdem moegliche Sperren ausserhalb dieses Servers: Cloud-Firewall/Security-Group, Hypervisor-Firewall (z.B. Proxmox), Netzwerk-Firewall/VLAN"
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# ---------------------------------------------------------------------------
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head_ "Ergebnis"
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if [ "${#FIX_CMD[@]}" -eq 0 ]; then
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if [ "$PROBLEMS" -eq 0 ]; then ok "Keine Probleme auf diesem Server gefunden"
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else note "$PROBLEMS Problem(e) gefunden, aber keine automatische Behebung moeglich (siehe oben)"; fi
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exit $(( PROBLEMS > 0 ))
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fi
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echo "Vorgeschlagene Aenderungen:"
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for i in "${!FIX_CMD[@]}"; do
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echo " $((i + 1)). ${FIX_DESC[$i]}"
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echo " # ${FIX_CMD[$i]}"
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done
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if [ "$MODE" = check ]; then
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echo "Nur Pruefung (--check). Anwenden mit: sudo $0 --yes"
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exit 1
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fi
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is_root || { bad "Aenderungen brauchen root: sudo $0"; exit 1; }
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if [ "$MODE" = ask ]; then
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read -r -p "Aenderungen jetzt anwenden? [j/N] " answer
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[[ $answer =~ ^[jJyY] ]] || { echo "Abgebrochen."; exit 1; }
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fi
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rc=0
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for i in "${!FIX_CMD[@]}"; do
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if bash -c "${FIX_CMD[$i]}"; then ok "${FIX_DESC[$i]}"
|
||||
else bad "fehlgeschlagen: ${FIX_DESC[$i]}"; rc=1; fi
|
||||
done
|
||||
# iptables-Regeln dauerhaft speichern, sofern ein Speichermechanismus installiert ist
|
||||
if printf '%s\n' "${FIX_CMD[@]}" | grep -q '^iptables '; then
|
||||
if have netfilter-persistent; then netfilter-persistent save >/dev/null 2>&1 && ok "iptables-Regeln gespeichert (netfilter-persistent)"
|
||||
elif [ -f /etc/sysconfig/iptables ] && have iptables-save; then iptables-save > /etc/sysconfig/iptables && ok "iptables-Regeln gespeichert (/etc/sysconfig/iptables)"
|
||||
else note "iptables-Regel gilt bis zum Neustart. Dauerhaft z.B. mit iptables-persistent/iptables-services."; fi
|
||||
fi
|
||||
[ "${NFT_PERSIST:-0}" = 1 ] && note "nftables-Regel gilt bis zum Neustart. Dauerhaft: in /etc/nftables.conf (bzw. /etc/sysconfig/nftables.conf) eintragen."
|
||||
|
||||
echo
|
||||
echo "Erneute Pruefung:"
|
||||
recheck=(--check --port "$PORT"); [ "$TCP_ONLY" = 1 ] && recheck+=(--tcp)
|
||||
"$0" "${recheck[@]}" | grep -E 'PROBLEM|Keine Probleme|Problem\(e\)' || true
|
||||
exit $rc
|
||||
Reference in New Issue
Block a user