Added ipnat container

2023-08-25 20:39:55 -07:00
parent d4666c5a0d
commit 134183029f
4 changed files with 86 additions and 0 deletions
@@ -0,0 +1,28 @@
+nat () {
+    # All traffic to $THIS_PORT on this container
+    # will be redirected to $THAT_PORT on $THAT_IP
+    $THAT_IP=$1
+    THIS_PORT=$2
+    THAT_PORT=$3
+
+    # Accept forward incoming traffic
+    iptables -I FORWARD -d $FWD_IP -m tcp -p tcp --dport $THAT_PORT -j ACCEPT
+
+    # Accept forward return traffic
+    iptables -I FORWARD -s $FWD_IP -m tcp -p tcp --sport $THAT_PORT -j ACCEPT
+
+    # Redirect packets to remote
+    iptables -t nat -I PREROUTING -m tcp -p tcp --dport $THIS_PORT -j DNAT --to-destination $THAT_IP:$THAT_PORT
+}
+
+NAT_IP=10.143.0.20
+nat $NAT_IP 33 10013
+nat $NAT_IP 993 10015
+nat $NAT_IP 587 10016
+
+
+
+
+
+# Include this line ONCE, at the end.
+iptables -t nat -I POSTROUTING -d $FWD_IP -j MASQUERADE