Add support for Portforwarding TCP/UDP using socat.

conf/main_ipv6.conf.sample

@@ -522,6 +522,50 @@ udp_out_ports=""
 forward_udp_out_ports=""
 
 
+
+# =============
+# --- Portforwarding
+# =============
+
+# - Portforwarding TCP
+# -
+# - portforward_tcp="<device-in>,<src-ip>,<port-in>,<ip-to-forward>,<port-out>"
+# -
+# - Multiple declarations (blank separated list) are possible
+# -
+# - Example:
+# -    portforward_tcp="${ext_if_1},${ext_1_ip},9997,2a01:30:0:13:5054:ff:fe83:dbda,c22
+# -                     ${ext_if_1},${ext_1_ip},80,2a01:30:0:13:211:84ff:feb7:7f9c,80
+# -                     ${ext_if_1},2a01:30:0:13:2d1:2bff:fec1:aed0,80,2a01:30:0:13:211:84ff:feb7:7f9c,80
+# -                     ${ext_if_1},2a01:30:0:13:2d1:2bff:fec1:aed0,443,2a01:30:0:13:211:84ff:feb7:7f9c,443
+# -                     "
+# -
+# - Note!
+# -    be careful if you use a variable (e.g. ext_1_ip) that it contains NO SPACES.
+# -
+# - Blank separated list
+# -
+portforward_tcp=""
+
+
+# - Portforwarding UDP
+# -
+# - portforward_udp="<device-in>,<src-ip>,<udp-port-in>,<ip-to-forward>,<udp-port-out>"
+# -
+# - Multiple declarations (blank separated list) are possible
+# -
+# - Example:
+# -    portforward_udp="
+# -       ${ext_if_1},${ext_1_ip},1094,,1094
+# -       ${ext_if_1},${ext_1_ip},1095,,1095
+# -    "
+# -
+# - Blank separated list
+# -
+portforward_udp=""
+
+
+
 # -------------
 # --- Block IP's / IP-Ranges
 # -------------