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#!/bin/sh # Dump all foreign options (coming from environment variables foreign_option_N) to stdout foreign_options() { local i i=1 while true; do local varname=foreign_option_$i local value="$(eval echo \$$varname)" if [ -z "$value" ]; then return fi echo $value i=$((i+1)) done } #Create a resolv.conf file from OpenVPN environment variables create_resolvconf() { foreign_options | grep "^dhcp-option DNS " | sed "s/^dhcp-option DNS /nameserver /" } route_up() { create_resolvconf | resolvconf -x -a $dev } down() { resolvconf -d $dev } case "$script_type" in route-up) route_up "$@" ;; down) down "$@" ;; esac 

#!/bin/sh create_resolvconf() { for ip in $VPN_IP4_NAMESERVERS $VPN_IP6_NAMESERVERS; do echo "nameserver $ip" done } up() { create_resolvconf | resolvconf -x -a $VPN_IP_IFAC } down() { resolvconf -d $VPN_IP_IFAC } if [ -z "$VPN_IP_IFACE" ]; then return 0 fi case "$2" in up) up ;; down) down ;; esac 

#!/bin/sh # Dump all foreign options (coming from environment variables foreign_option_N) to stdout foreign_options() { local i i=1 while true; do local varname=foreign_option_$i local value="$(eval echo \$$varname)" if [ -z "$value" ]; then return fi echo $value i=$((i+1)) done } #Create a resolv.conf file from OpenVPN environment variables create_resolvconf() { foreign_options | grep "^dhcp-option DNS " | sed "s/^dhcp-option DNS /nameserver /" } route_up() { create_resolvconf | resolvconf -x -a $dev } down() { resolvconf -d $dev } case "$script_type" in route-up) route_up "$@" ;; down) down "$@" ;; esac 

#!/bin/sh create_resolvconf() { for ip in $VPN_IP4_NAMESERVERS $VPN_IP6_NAMESERVERS; do echo "nameserver $ip" done } up() { create_resolvconf | resolvconf -x -a $VPN_IP_IFAC } down() { resolvconf -d $VPN_IP_IFAC } if [ -z "$VPN_IP_IFACE" ]; then return 0 fi case "$2" in up) up ;; down) down ;; esac 

NetworkManager can either:

• update resolv.conf itself;

• delegate to resolvconf (for the NetworkManager interface);

• or use netconfig.

The different configurations coming from each interface are simply aggregated (see update_dns()).

If you do not use NetworkManager for the VPN, you might use openresolv exclusive mode (-x) in order to override the nameservers from NetworkManager with the ones from the VPN instead of adding them. This can be done with this (ugly) script (OpenVPN hook):

#!/bin/sh # Dump all foreign options (coming from environment variables foreign_option_N) to stdout foreign_options() { local i i=1 while true; do local varname=foreign_option_$i local value="$(eval echo \$$varname)" if [ -z "$value" ]; then return fi echo $value i=$((i+1)) done } #Create a resolv.conf file from OpenVPN environment variables create_resolvconf() { foreign_options | grep "^dhcp-option DNS " | sed "s/^dhcp-option DNS /nameserver /" } route_up() { create_resolvconf | resolvconf -x -a $dev } down() { resolvconf -d $dev } case "$script_type" in route-up) route_up "$@" ;; down) down "$@" ;; esac 

You should be able to adapt this to be used as a NetworkManager dispatcher script (see man 8 NetworkManager) using:

• IP4_NAMESERVERS
• IP6_NAMESERVERS

I didn't test it but something like this should do the trick:

#!/bin/sh create_resolvconf() { for ip in $IP4_NAMESERVERS $IP6_NAMESERVERS; do echo nameserver $ip done } up() { create_resolvconf | resolvconf -x -a $DEVICE_IFACE } down() { resolvconf -d $DEVICE_IFACE }   case "$1" in  tun* | tap*0)  ;;  *)   return 0; esac case "$2" in up) up ;; down) down ;; esac 

NetworkManager can either:

• update resolv.conf itself;

• delegate to resolvconf (for the NetworkManager interface);

• or use netconfig.

The different configurations coming from each interface are simply aggregated (see update_dns()).

If you do not use NetworkManager for the VPN, you might use openresolv exclusive mode (-x) in order to override the nameservers from NetworkManager with the ones from the VPN instead of adding them. This can be done with this (ugly) script (OpenVPN hook):

#!/bin/sh # Dump all foreign options (coming from environment variables foreign_option_N) to stdout foreign_options() { local i i=1 while true; do local varname=foreign_option_$i local value="$(eval echo \$$varname)" if [ -z "$value" ]; then return fi echo $value i=$((i+1)) done } #Create a resolv.conf file from OpenVPN environment variables create_resolvconf() { foreign_options | grep "^dhcp-option DNS " | sed "s/^dhcp-option DNS /nameserver /" } route_up() { create_resolvconf | resolvconf -x -a $dev } down() { resolvconf -d $dev } case "$script_type" in route-up) route_up "$@" ;; down) down "$@" ;; esac 

You should be able to adapt this to be used as a NetworkManager dispatcher script (see man 8 NetworkManager) using:

• VPN_IP4_NAMESERVERS
• VPN_IP6_NAMESERVERS

I didn't test it but something like this should do the trick:

#!/bin/sh create_resolvconf() { for ip in $VPN_IP4_NAMESERVERS $VPN_IP6_NAMESERVERS; do echo "nameserver $ip" done } up() { create_resolvconf | resolvconf -x -a $VPN_IP_IFAC } down() { resolvconf -d $VPN_IP_IFAC } if [ -z "$VPN_IP_IFACE" ]; then return 0 fi case "$2" in up) up ;; down) down ;; esac 

• update resolv.conf itself;

• delegate to resolvconf (for the NetworkManager interface);

• or use netconfig.

   switch (priv->rc_manager) { case NM_DNS_MANAGER_RESOLV_CONF_MAN_NONE: result = update_resolv_conf (self, searches, nameservers, options, error, TRUE); resolv_conf_updated = TRUE; break; case NM_DNS_MANAGER_RESOLV_CONF_MAN_RESOLVCONF: result = dispatch_resolvconf (self, searches, nameservers, options, error); break; case NM_DNS_MANAGER_RESOLV_CONF_MAN_NETCONFIG: result = dispatch_netconfig (self, searches, nameservers, nis_domain, nis_servers, error); break; default: g_assert_not_reached (); } 

The different configurations coming from each interface are aggregated (see update_dns).

#!/bin/sh # Dump all foreign options (coming from environment variables foreign_option_N) to stdout foreign_options() { local i i=1 while true; do local varname=foreign_option_$i local value="$(eval echo \$$varname)" if [ -z "$value" ]; then return fi echo $value i=$((i+1)) done } #Create a resolv.conf file from OpenVPN environment variables create_resolvconf() { foreign_options | grep "^dhcp-option DNS " | sed "s/^dhcp-option DNS /nameserver /" } route_up() { create_resolvconf | resolvconf -x -a $dev } down() { resolvconf -d $dev } case "$script_type" in route-up) route_up "$@" ;; down) down "$@" ;; esac 

• update resolv.conf itself;

• delegate to resolvconf (for the NetworkManager interface);

• or use netconfig.

The different configurations coming from each interface are simply aggregated (see update_dns()).

#!/bin/sh # Dump all foreign options (coming from environment variables foreign_option_N) to stdout foreign_options() { local i i=1 while true; do local varname=foreign_option_$i local value="$(eval echo \$$varname)" if [ -z "$value" ]; then return fi echo $value i=$((i+1)) done } #Create a resolv.conf file from OpenVPN environment variables create_resolvconf() { foreign_options | grep "^dhcp-option DNS " | sed "s/^dhcp-option DNS /nameserver /" } route_up() { create_resolvconf | resolvconf -x -a $dev } down() { resolvconf -d $dev } case "$script_type" in route-up) route_up "$@" ;; down) down "$@" ;; esac 

You should be able to adapt this to be used as a NetworkManager dispatcher script (see man 8 NetworkManager) using:

• IP4_NAMESERVERS
• IP6_NAMESERVERS

I didn't test it but something like this should do the trick:

#!/bin/sh create_resolvconf() { for ip in $IP4_NAMESERVERS $IP6_NAMESERVERS; do echo nameserver $ip done } up() { create_resolvconf | resolvconf -x -a $DEVICE_IFACE } down() { resolvconf -d $DEVICE_IFACE } case "$1" in tun* | tap*0) ;; *) return 0; esac case "$2" in up) up ;; down) down ;; esac