early commit

site-b.yml

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+---
+# ===========================================================================
+# Site B — the mirror image of vars/site-a.yml. Run this at Site B only:
+#
+#   ansible-playbook wg-relay.yml -e @vars/site-b.yml
+#
+# Note the LAN addresses here are Site B's own; they have no relationship to
+# the ones in site-a.yml and the two sites may well use the same subnet.
+# Only the 10.99.0.x tunnel addresses have to agree between the files.
+# ===========================================================================
+
+# --- which box to configure ------------------------------------------------
+relay_host: 10.0.0.10
+relay_user: admin
+
+# --- this side of the tunnel -----------------------------------------------
+wg_address: 10.99.0.2/32
+wg_listen_port: 51820
+
+# --- the other side --------------------------------------------------------
+wg_peers:
+  - name: site-a
+    public_key: "PASTE_SITE_A_PUBLIC_KEY_HERE"
+    endpoint: site-a.example.com:51820
+    allowed_ips: 10.99.0.1/32
+    keepalive: 25
+
+# --- what is reachable, in each direction ----------------------------------
+relays:
+  # Site A reaching the service on Site B's LAN.
+  - name: in-site-a
+    direction: inbound
+    listen_address: 10.99.0.2        # this box's tunnel address
+    listen_port: 9000
+    target: 10.0.0.50:9000           # the one host:port Site A may reach
+    source_allow: 10.99.0.1/32       # Site A's tunnel address only
+
+  # Site B reaching the service on Site A's LAN.
+  - name: out-site-a
+    direction: outbound
+    listen_address: 10.0.0.10        # this box's LAN address
+    listen_port: 9001
+    target: 10.99.0.1:9000           # Site A's inbound relay
+    source_allow: 10.0.0.50/32       # the one local client allowed to use it