openvpn push DNS a android

Buenas,

Tengo un servidor openvpn y quisiera saber cuál es la configuración correcta para hacer un push de los dns desde el servidor al cliente Android ya que 'push "dhcp-option DNS *.*.*.*"' no me funciona, ni tan siquiera en Windows, cabe destacar que tengo antes la opción
push "redirect-gateway def1 bypass-dhcp"
, Os dejo con la configuración de cliente y servidor, en teoría es una config estándar que no debería dar problemas. Recuerdo que el servidor antiguo me llegó a funcionar sin scripts, ya que he leído un montón y todos dicen que son necesarios script de inicio de vpn, a ver si hay alguien que me ilumine. Gracias de antemano

Configuración cliente (Android)
##############################################
# Sample client-side OpenVPN 2.0 config file #
# for connecting to multi-client server.     #
#                                            #
# This configuration can be used by multiple #
# clients, however each client should have   #
# its own cert and key files.                #
#                                            #
# On Windows, you might want to rename this  #
# file so it has a .ovpn extension           #
##############################################

# Specify that we are a client and that we
# will be pulling certain config file directives
# from the server.
client

# Use the same setting as you are using on
# the server.
# On most systems, the VPN will not function
# unless you partially or fully disable
# the firewall for the TUN/TAP interface.
;dev tap
dev tun

# Windows needs the TAP-Win32 adapter name
# from the Network Connections panel
# if you have more than one.  On XP SP2,
# you may need to disable the firewall
# for the TAP adapter.
;dev-node MyTap

# Are we connecting to a TCP or
# UDP server?  Use the same setting as
# on the server.
;proto tcp
proto udp

# The hostname/IP and port of the server.
# You can have multiple remote entries
# to load balance between the servers.
remote  ***** *****
;remote my-server-2 1194

# Choose a random host from the remote
# list for load-balancing.  Otherwise
# try hosts in the order specified.
;remote-random

# Keep trying indefinitely to resolve the
# host name of the OpenVPN server.  Very useful
# on machines which are not permanently connected
# to the internet such as laptops.
resolv-retry infinite

# Most clients don't need to bind to
# a specific local port number.
nobind

# Downgrade privileges after initialization (non-Windows only)
;user nobody
;group nogroup

# Try to preserve some state across restarts.
persist-key
persist-tun

# If you are connecting through an
# HTTP proxy to reach the actual OpenVPN
# server, put the proxy server/IP and
# port number here.  See the man page
# if your proxy server requires
# authentication.
;http-proxy-retry # retry on connection failures
;http-proxy [proxy server] [proxy port #]

# Wireless networks often produce a lot
# of duplicate packets.  Set this flag
# to silence duplicate packet warnings.
;mute-replay-warnings

# SSL/TLS parms.
# See the server config file for more
# description.  It's best to use
# a separate .crt/.key file pair
# for each client.  A single ca
# file can be used for all clients.
ca ca.crt
cert client.crt
key client.key

# Verify server certificate by checking
# that the certicate has the nsCertType
# field set to "server".  This is an
# important precaution to protect against
# a potential attack discussed here:
#  http://openvpn.net/howto.html#mitm
#
# To use this feature, you will need to generate
# your server certificates with the nsCertType
# field set to "server".  The build-key-server
# script in the easy-rsa folder will do this.
ns-cert-type server

# If a tls-auth key is used on the server
# then every client must also have the key.
tls-auth ta.key 1

# Select a cryptographic cipher.
# If the cipher option is used on the server
# then you must also specify it here.
cipher BF-CBC
;auth-user-pass
;auth-nocache
# Enable compression on the VPN link.
# Don't enable this unless it is also
# enabled in the server config file.
comp-lzo

# Set log file verbosity.
verb 3

# Silence repeating messages
;mute 20



Configuración servidor (CentOS 7)
port ****
proto udp
dev tun                                                                      ca ca.crt
cert server.crt
key server.key #secret
dh fh.pem
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "redirect-gateway def1 bypass-dhcp"
#fuerzo red local del servidor por si el cliente se encuentra en una similar
push "route 192.168.1.0 255.255.255.0"
keepalive 10 120
push "dhcp-option DNS 10.8.0.1"
tls-auth ta.key 0 # This file is secret
comp-lzo
max-clients 10
user nobody
group nobody
persist-key
persist-tun
status /var/log/openvpn/openvpn-status.log
log /var/log/openvpn/openvpn.log
verb 3
Que cliente usas en Android?
X-Tornado escribió:Que cliente usas en Android?

Tanto "openvpn Connect" (creo que es el oficial) como "openvpn para Android", conecto a la vpn sin problemas, puedo navegar por la rd local pero las dns no se cambian. En Windows probé con el oficial, y pese a que al principio me daba errores, lo cambie para que se ejecutará como administrador, ya ni hubo problemas con la ruta, pero los dns no funcionaban (aunque creo que esto era un problema de el mrtric de las redes, le daba más importancia al dns de Ethernet que al de la vpn)

EDITO: La configuración era correcta, el problema venía de que la configuración de dnsmasqd solo escuchaba peticiones por eth0, y al ser vpn las peticiones iban por tun0, añadido tun0 a la configuración de pi-hole/dnsmasqd y reiniciando dnsmasqd se ha solucionado el problema.

Saludos
2 respuestas