The firewall turns off and on with the cluster's settings; llmgw wipe

firewall.enabled (default true) is a cluster setting, applied live: the
leader sends a Firewall message to every agent when it registers and when
the setting or firewall_networks changes, and the agent (root) takes llmgw's
nft table out or installs it. A control plane writes the state to
/var/lib/llmgw/firewall.json, which llmgw-firewall-sync.path applies as root
with `llmgw firewall sync`; server init and server add install the units,
`llmgw firewall sync --install` on one set up before. node add and server
add put no firewall on a machine while the setting is off.

`llmgw wipe` removes llmgw from a machine after listing what goes and asking
for its name: units, engines' processes, the nft table, /etc/llmgw,
/var/lib/llmgw, the agent's state, the sudo grant, the CA from the trust
store, keepalived's configuration when llmgw wrote it, and the users.
--models, --store (Patroni member, etcd, or the local database) and --all
take more. The console has it under Do.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/reference.md

@@ -98,6 +98,7 @@ rather than repeated.
 | `other_watts` | `float64` | [FacilityBudget](#facilitybudget) |
 | `name` | `string` | [Federation](#federation) |
 | `interval` | `time.Duration` | [Federation](#federation) |
+| `enabled` | `bool` | [FirewallSettings](#firewallsettings) |
 | `format` | `string` | [GuardModel](#guardmodel) |
 | `categories` | `[]string` | [GuardModel](#guardmodel) |
 | `model` | `string` | [JudgePolicy](#judgepolicy) |
@@ -287,6 +288,7 @@ rather than repeated.
 | `guard` | `guard.Config` | [Server](#server) |
 | `secrets` | `Secrets` | [Server](#server) |
 | `notify` | `notify.Config` | [Server](#server) |
+| `firewall` | `FirewallSettings` | [Server](#server) |
 | `firewall_networks` | `[]string` | [Server](#server) |
 | `backup_recipients` | `[]string` | [Server](#server) |
 | `backup_copy_to` | `[]string` | [Server](#server) |
@@ -963,6 +965,19 @@ Interval is how often each peer is asked whether it is ready, timed,
 and what it offers. A peer that does not answer is taken out of
 routing until it does. Zero is 10s.
 
+## FirewallSettings
+
+### `enabled`
+
+`bool`
+
+Enabled keeps llmgw's internal ports — engines, node exporter, the
+agents' stream, the mirror, the store — to the cluster's networks on
+every machine. False removes llmgw's nftables table everywhere, for a
+site whose own firewall does that job; the rules are kept, and true
+puts them back. Changed in the cluster's settings, it is in force on
+every node and control plane within seconds.
+
 ## GuardModel
 
 ### `format`
@@ -2441,6 +2456,14 @@ Prometheus and Alertmanager in between. Empty sends nothing.
 
 Takes a [notify.Config](#notifyconfig) block.
 
+### `firewall`
+
+`FirewallSettings`
+
+Firewall turns llmgw's firewall on every machine on or off.
+
+Takes a [FirewallSettings](#firewallsettings) block.
+
 ### `firewall_networks`
 
 `[]string`