/etc/openvpn/53.conf (server)

port 53
proto tcp
dev tun
ca /etc/openvpn/keys/ca.crt
cert /etc/openvpn/keys/server.crt
key /etc/openvpn/keys/server.key
dh /etc/openvpn/keys/dh1024.pem

plugin /usr/share/openvpn/plugin/lib/openvpn-auth-pam.so /etc/pam.d/login
client-cert-not-required
username-as-common-name

server 10.9.0.0 255.255.255.0
#ifconfig-pool-persist ipp.txt
#push "redirect-gateway def1"
push "dhcp-option DNS 10.9.0.1"
#push "dhcp-option DNS 4.2.2.2"
keepalive 5 30
comp-lzo
persist-key
persist-tun
status server-tcp.log
verb 3