add legacy bash code/notes

expose_forwards.ps1

@@ -86,3 +86,35 @@ foreach($yaml in (Get-ChildItem -Filter '*.yml')) {
         }
     }
 }
+
+
+
+#TODO: port from bash
+
+chain_rule='-m addrtype --dst-type LOCAL -j SWARM-NAT'
+if ! iptables -t nat -C PREROUTING $chain_rule; then
+    Write-Output 'Add jump rule for SWARM-NAT'
+    iptables -t nat -A PREROUTING $chain_rule
+fi
+
+
+bridge=$(
+    docker network inspect docker_gwbridge \
+        --format '{{(index .Containers "ingress-sbox").IPv4Address}}' \
+    | cut -d'/' -f1
+)
+
+internal_port=30000
+public_port=30001
+destination='145.239.119.128'
+
+
+rule="-p tcp -m tcp --destination ""${destination}"" --dport ""${public_port}""
+      -j DNAT --to-destination ""${bridge}:${internal_port}"""
+
+if ! iptables -t nat -C SWARM-NAT $rule > /dev/null; then
+    Write-Output "Add rule for NAT from ${destination}:${public_port} to ${bridge}:${internal_port}"
+    iptables -t nat -A SWARM-NAT $rule
+else
+    Write-Output "Rule for NAT from ${destination}:${public_port} to ${bridge}:${internal_port} already exists"
+fi