diff --git a/bin/firewall-sosdg b/bin/firewall-sosdg
index 7d5d4c9..51846be 100755
--- a/bin/firewall-sosdg
+++ b/bin/firewall-sosdg
@@ -106,12 +106,16 @@ fi
 
 
 if [[ "$EXTIF" == "auto" ]]; then
+	if [ ! "$EXTIF_FIND" ]; then
+		
 	EXTIF=$EXTIF_FIND
 	display_c YELLOW "Found default interface at: ${BLUE}${EXTIF}${DEFAULT_COLOR}"
 fi
 
 if [[ "$EXTIP" == "auto" ]]; then
-	EXTIP=$EXTIP_FIND
+	if [ ! "$EXTIP_FIND" ]; then
+		EXTIP=$(expr "`ifconfig ${EXTIF}`" : '.*inet addr:\([^ ]*\).*')
+	fi
 	display_c YELLOW "Found default interface IP at: ${BLUE}${EXTIP}${DEFAULT_COLOR}"
 fi
 
diff --git a/bin/get_default_if b/bin/get_default_if
new file mode 100755
index 0000000..6910b18
--- /dev/null
+++ b/bin/get_default_if
@@ -0,0 +1,3 @@
+#!/bin/bash
+ip route | awk '/^default/{print $3}'
+#netstat -rn | awk '/^0.0.0.0/{print $8}'
diff --git a/bin/get_default_ip b/bin/get_default_ip
new file mode 100755
index 0000000..24a2989
--- /dev/null
+++ b/bin/get_default_ip
@@ -0,0 +1,7 @@
+#!/bin/bash
+# Thanks to the people at: 
+# http://www.linuxquestions.org/questions/programming-9/using-grep-and-awk-to-get-ip-address-627626/
+
+echo $(expr "`ifconfig $1`" : '.*inet addr:\([^ ]*\).*')
+
+#ifconfig ${EXTIF}| awk -F ' *|:' '/inet addr/{print $4}'
diff --git a/include/functions b/include/functions
index 5b48ad4..c78e170 100755
--- a/include/functions
+++ b/include/functions
@@ -171,4 +171,4 @@ function write_out_rules {
 }
 function write_out_rules_v6 {
 	echo "$*" >> "$RULE_CACHE_V6"
-}
\ No newline at end of file
+}
diff --git a/include/static b/include/static
index 89a1a3f..177117c 100755
--- a/include/static
+++ b/include/static
@@ -69,5 +69,5 @@ RULE_CACHE_V6=$BASEDIR/cache/ipt6-rules
 
 EXTIP="auto"
 EXTIF="auto"
-EXTIF_FIND=`ip route | awk '/^default/{print $3}'`
-EXTIP_FIND=$(expr "`ifconfig ${EXTIF}`" : '.*inet addr:\([^ ]*\).*')
\ No newline at end of file
+EXTIF_FIND="$BASEDIR/bin/get_default_if"
+EXTIP_FIND="$BASEDIR/bin/get_default_ip"
\ No newline at end of file
diff --git a/options.default b/options.default
index 876c54e..e1649b5 100755
--- a/options.default
+++ b/options.default
@@ -57,22 +57,18 @@ EXTIF="auto"
 # the primary external IP using the information from EXTIF
 EXTIP="auto"
 
+# Program/script for finding the default external interface
+# Only used if EXTIF is set to auto
+#
+# If you need to write your own script to find the info, change below
+#EXTIF_FIND="$BASEDIR/bin/get_default_if"
+
 # Pattern for finding the default external interface IP address
 # Only used if EXTIP is set to auto
 #
-# Thanks to the people at: 
-# http://www.linuxquestions.org/questions/programming-9/using-grep-and-awk-to-get-ip-address-627626/
-#
-# Uncomment one of these if the default doesn't work
-#EXTIP_FIND=$(expr "`ifconfig ${EXTIF}`" : '.*inet addr:\([^ ]*\).*')
-#EXTIP_FIND=`ifconfig ${EXTIF}| awk -F ' *|:' '/inet addr/{print $4}'`
-
-# Pattern for finding the default external interface
-# Only used if EXTIF is set to auto
-#
-# Uncomment one of these if the default doesn't work
-#EXTIF_FIND=`ip route | awk '/^default/{print $3}'`
-#EXTIF_FIND=`netstat -rn | awk '/^0.0.0.0/{print $8}'`
+# If you need to write your own script to find the info, change below
+# note that the script passes the interface from $EXTIF as first option
+#EXTIP_FIND="$BASEDIR/bin/get_default_ip"
 
 # Internal Interface
 #INTINF=ppp+