When adding nameservers to the system, add a route to the ip through the interface in question. This ensures that domain name server lookups to the nameserver goes out the correct wan address. Also before adding new entries route delete the old nameserver routes that are on file to ensure that a long uptime doesn't result in stale routes.

1 files changed, 18 insertions, 2 deletions

diff --git a/sbin/dhclient-script b/sbin/dhclient-script
index 2ec748c..6910024 100755
--- a/sbin/dhclient-script
+++ b/sbin/dhclient-script
@@ -63,6 +63,10 @@ delete_old_address() {
 }
 
 add_new_address() {
+
+	# Kill off old pftpx process.
+	kill `ps awux | grep "pftpx -b" | grep -v grep | grep $old_ip_address | cut -d" " -f5`
+
 	$IFCONFIG $interface \
 		inet $new_ip_address \
 		netmask $new_subnet_mask \
@@ -161,12 +165,24 @@ add_new_routes() {
 }
 
 add_new_resolv_conf() {
-
 	/bin/rm -f /var/etc/nameservers.conf
-
+	if [ ! -f "/var/etc/nameserver_$interface" ]; then
+		# Make sure file exists to avoid errors
+		touch /var/etc/nameserver_$interface
+	fi
 	if [ -n "$new_domain_name_servers" ]; then
+		# Remove old entries
+		for nameserver in `cat /var/etc/nameserver_$interface`; do
+			route delete $nameserver
+		done
+		rm -f /var/etc/nameserver_$interface
 		for nameserver in $new_domain_name_servers; do
 			echo $nameserver >>/var/etc/nameservers.conf
+			# Add a route to the nameserver out the correct interface
+			# so that mulitple wans work correctly with multiple dns
+			# also backup the nameserver for later route removal
+			echo $nameserver >>/var/etc/nameserver_$interface
+			route add $nameserver -if $interface			
 		done
 		echo $new_domain_name >/var/etc/defaultdomain.conf
 	fi