abrown38andClaude Opus 5.5
34292eeebb
Zones, address sets (IPv4 and IPv6 mixed, dynamic sets with timeouts) and services, ordered rules in the early, input, forward and output chains, port forwards with hairpin NAT and IPv6 pinholes, source NAT, redirects, and switchable built-ins (loopback, conntrack, ICMPv6, antispoofing, MSS clamping, DHCPv6 client, flowtable). Every change is validated, checked with nft -c and applied in one transaction to Housecarl's own table, inet housecarl; changes made over the network roll back unless confirmed, and the confirmed ruleset is loaded at boot by housecarl-ruleset.service. An empty configuration applies nothing. Also: hit counters and the drop log (nflog), 'hc import' of an existing nftables ruleset and 'hc takeover', the hc CLI, the REST API and the web UI, users, scoped tokens (sets:write:NAME), the audit log, the web UI's certificate through Jarl, Debian packages, docs, unit tests with real nft 1.1.3, and an e2e test with real traffic (71 checks). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
64 lines
2.0 KiB
Desktop File
64 lines
2.0 KiB
Desktop File
# Housecarl: keeps the firewall's nftables ruleset; its REST API and web UI.
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# Installed as /etc/systemd/system/housecarl.service (see docs/install.md).
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[Unit]
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Description=Housecarl firewall manager (with web UI and API)
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Documentation=file:///usr/local/share/doc/housecarl/README.md
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# The confirmed ruleset is already in force from housecarl-ruleset.service.
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After=housecarl-ruleset.service network-online.target
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Wants=network-online.target
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[Service]
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Type=notify
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NotifyAccess=main
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ExecStart=/usr/local/bin/housecarld --config /etc/housecarl/housecarl.yaml serve
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# SIGHUP rereads the TLS certificate.
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ExecReload=/bin/kill -HUP $MAINPID
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Restart=on-failure
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RestartSec=2s
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User=housecarl
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Group=housecarl
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UMask=0027
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# /var/lib/housecarl: the database and the confirmed ruleset (ruleset.nft).
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StateDirectory=housecarl
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StateDirectoryMode=0750
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ConfigurationDirectory=housecarl
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ConfigurationDirectoryMode=0750
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# /run/housecarl: the local API socket (housecarl.sock), for root and the
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# housecarl user.
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RuntimeDirectory=housecarl
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RuntimeDirectoryMode=0750
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# Sandboxing: housecarld writes only its own state.
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ProtectSystem=strict
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ProtectHome=yes
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PrivateTmp=yes
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PrivateDevices=yes
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NoNewPrivileges=yes
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# The only privilege housecarld gets: changing nftables (it runs nft) and
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# reading logged packets (nfnetlink_log), both CAP_NET_ADMIN.
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CapabilityBoundingSet=CAP_NET_ADMIN
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AmbientCapabilities=CAP_NET_ADMIN
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ProtectKernelTunables=yes
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ProtectKernelModules=yes
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ProtectKernelLogs=yes
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ProtectControlGroups=yes
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ProtectClock=yes
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ProtectHostname=yes
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RestrictNamespaces=yes
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RestrictRealtime=yes
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RestrictSUIDSGID=yes
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LockPersonality=yes
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MemoryDenyWriteExecute=yes
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# AF_NETLINK: nftables, logged packets, the interfaces and their addresses.
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RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6 AF_NETLINK
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SystemCallArchitectures=native
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SystemCallFilter=@system-service
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SystemCallErrorNumber=EPERM
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[Install]
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WantedBy=multi-user.target
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# 'systemctl restart housecarld' works too (the daemon's binary is housecarld).
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Alias=housecarld.service
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