gateway nat script; gitignore

.gitignore

@@ -0,0 +1 @@
+vim/vim/.netrwhist

gnome-terminal/gnome-terminal/profiles/Default/%gconf.xml

@@ -1,23 +1,23 @@
 <?xml version="1.0"?>
 <gconf>
-	<entry name="scrollback_unlimited" mtime="1478802656" type="bool" value="true"/>
-	<entry name="use_theme_colors" mtime="1478802656" type="bool" value="false"/>
-	<entry name="silent_bell" mtime="1478802656" type="bool" value="true"/>
-	<entry name="default_show_menubar" mtime="1478802656" type="bool" value="false"/>
-	<entry name="palette" mtime="1478802656" type="string">
+	<entry name="scrollback_unlimited" mtime="1480903381" type="bool" value="true"/>
+	<entry name="use_theme_colors" mtime="1480903381" type="bool" value="false"/>
+	<entry name="silent_bell" mtime="1480903381" type="bool" value="true"/>
+	<entry name="default_show_menubar" mtime="1480903381" type="bool" value="false"/>
+	<entry name="palette" mtime="1480903381" type="string">
 		<stringvalue>#2E2E34343636:#CCCC00000000:#4E4E9A9A0606:#C4C4A0A00000:#34346565A4A4:#757550507B7B:#060698209A9A:#D3D3D7D7CFCF:#555557575353:#EFEF29292929:#8A8AE2E23434:#FCFCE9E94F4F:#72729F9FCFCF:#ADAD7F7FA8A8:#3434E2E2E2E2:#EEEEEEEEECEC</stringvalue>
 	</entry>
-	<entry name="alternate_screen_scroll" mtime="1478802656" type="bool" value="true"/>
-	<entry name="background_color" mtime="1478802656" type="string">
+	<entry name="alternate_screen_scroll" mtime="1480903381" type="bool" value="true"/>
+	<entry name="background_color" mtime="1480903381" type="string">
 		<stringvalue>#2E2E34343636</stringvalue>
 	</entry>
-	<entry name="visible_name" mtime="1478802656" type="string">
+	<entry name="visible_name" mtime="1480903381" type="string">
 		<stringvalue>Default</stringvalue>
 	</entry>
-	<entry name="bold_color" mtime="1478802656" type="string">
+	<entry name="bold_color" mtime="1480903381" type="string">
 		<stringvalue>#000000000000</stringvalue>
 	</entry>
-	<entry name="foreground_color" mtime="1478802656" type="string">
+	<entry name="foreground_color" mtime="1480903381" type="string">
 		<stringvalue>#FFFFFFFFFFFF</stringvalue>
 	</entry>
 </gconf>

misc/gateway_nat.sh

@@ -0,0 +1,30 @@
+#! /usr/bin/env sh
+
+usage()
+{
+  echo "Usage: ${0} internal_iface external_iface (on|off)" >&2
+  exit 1
+}
+
+if [ "${#}" -ne 3 ]
+then
+  usage
+fi
+
+internal_iface="${1}"
+external_iface="${2}"
+status="${3}"
+
+if [ "${status}" = "on" ]
+then
+  flag="-A"
+elif [ "${status}" = "off" ]
+then
+  flag="-D"
+else
+  usage
+fi
+
+iptables -t nat "${flag}" POSTROUTING -o "${external_iface}" -j MASQUERADE
+iptables "${flag}" FORWARD -i "${external_iface}" -o "${internal_iface}" -m state --state RELATED,ESTABLISHED -j ACCEPT
+iptables "${flag}" FORWARD -i "${internal_iface}" -o "${external_iface}" -j ACCEPT