I currently have a debian server that is running an openvpn server. I also have a dns server (bind9) that I would like give allow access to by the connected openvpn clients, but I am unsure as of how to do this, I already known how to send dns options to the clients using
push "dhcp-option DNS x.x.x.x"
but I am just unsure how give the clients access to the dns server that is located on the same machine as the vpn server, so if anyone could point me in the right direction I would really appreciate it. Also in case this would have anything to do with adding rules to iptables, this is my current configuration for iptables
# Generated by iptables-save v1.4.14 on Thu Oct 18 22:05:33 2012 *nat :PREROUTING ACCEPT [3831842:462225238] :INPUT ACCEPT [3820049:461550908] :OUTPUT ACCEPT [1885011:139487044] :POSTROUTING ACCEPT [1883834:139415168] -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE COMMIT # Completed on Thu Oct 18 22:05:33 2012 # Generated by iptables-save v1.4.14 on Thu Oct 18 22:05:33 2012 *filter :INPUT ACCEPT [45799:10669929] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [45747:10335026] :fail2ban-apache - [0:0] :fail2ban-apache-myadmin - [0:0] :fail2ban-apache-noscript - [0:0] :fail2ban-ssh - [0:0] :fail2ban-ssh-ddos - [0:0] :fail2ban-webserver-w00tw00t - [0:0] -A INPUT -p tcp -m multiport --dports 80,443 -j fail2ban-apache-myadmin -A INPUT -p tcp -m multiport --dports 80,443 -j fail2ban-webserver-w00tw00t -A INPUT -p tcp -m multiport --dports 80,443 -j fail2ban-apache-noscript -A INPUT -p tcp -m multiport --dports 80,443 -j fail2ban-apache -A INPUT -p tcp -m multiport --dports 22 -j fail2ban-ssh-ddos -A INPUT -p tcp -m multiport --dports 22 -j fail2ban-ssh -A INPUT -i tun+ -j ACCEPT -A INPUT -i eth0 -p tcp -m tcp --dport 3306 -j ACCEPT -A FORWARD -i tun+ -j ACCEPT -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT -A fail2ban-apache -j RETURN -A fail2ban-apache-myadmin -s 188.8.131.52/32 -j DROP -A fail2ban-apache-myadmin -s 184.108.40.206/32 -j DROP -A fail2ban-apache-myadmin -j RETURN -A fail2ban-apache-noscript -j RETURN -A fail2ban-ssh -s 220.127.116.11/32 -j DROP -A fail2ban-ssh -s 18.104.22.168/32 -j DROP -A fail2ban-ssh -s 22.214.171.124/32 -j DROP -A fail2ban-ssh -s 126.96.36.199/32 -j DROP -A fail2ban-ssh -j RETURN -A fail2ban-ssh-ddos -j RETURN -A fail2ban-webserver-w00tw00t -s 188.8.131.52/32 -j DROP -A fail2ban-webserver-w00tw00t -s 184.108.40.206/32 -j DROP -A fail2ban-webserver-w00tw00t -j RETURN COMMIT # Completed on Thu Oct 18 22:05:33 2012
also here is my openvpn server configuration
port 1194 proto udp dev tun ca ca.crt cert server.crt key server.key dh dh1024.pem server 10.8.0.0 255.255.255.0 ifconfig-pool-persist ipp.txt keepalive 10 120 comp-lzo user nobody group users persist-key persist-tun status /var/log/openvpn/openvpn-status.log verb 3 push "redirect-gateway def1" push "dhcp-option DNS 220.127.116.11" push "dhcp-option DNS 18.104.22.168" push "dhcp-option DNS 22.214.171.124" client-to-client