If you choose to use OpenDNS, you will get IP addresses that are optimal to OpenDNS' network but maybe far away from your network. Typically, when you use your ISP's DNS server, you will get an IP address within or close to your ISP's network. These network will resolve an IP that is closest to you for performance. Additionally, IP addresses and/or MAC addresses of the clients can be defined by clicking the "Edit List of Clients" button under "Access Policy".ĭo note that many major websites, download hosts and media sites are now using content delivery network. Iptables -t nat -I PREROUTING -i br0 -s 192.168.1.128/25 -p tcp -dport 53 -j DNAT -to 208.67.222.222Īnother way of intercepting DNS requests can be done in the "Access Restrictions" tab under "Blocked Services" and by choosing "dns" option in the list of services. Iptables -t nat -A PREROUTING -i br0 -s 192.168.1.128/25 -p tcp -dport 53 -j DNAT -to $(nvram get lan_ipaddr) Iptables -t nat -A PREROUTING -i br0 -s 192.168.1.128/25 -p udp -dport 53 -j DNAT -to $(nvram get lan_ipaddr) Same as above but for a specific IP address/Range Click Save Firewall (note: your WAN interface will be restarted).Iptables -t nat -A PREROUTING -i br0 -p tcp -dport 53 -j DNAT -to $(nvram get lan_ipaddr) Iptables -t nat -A PREROUTING -i br0 -p udp -dport 53 -j DNAT -to $(nvram get lan_ipaddr) Go to Administration tab » Commands sub tab.You can prevent users from using their own DNS servers (and hence get around content filtering) by intercepting DNS queries and forcing them to use the DNS servers you specify. If you get a badauth error from dnsomatic, it could be that you need to use http instead of https but specify port 443, so try:.If you get a badauth error from dnsomatic, it could be that you need to use https instead of http, so try:.Put /nic/update?hostname= in the URL text box.To update multiple hosts, use hostname1 -a hostname2 -a hostname3 -a hostnameN Source: this tip.Fill in your Username and Password for OpenDNS/DNS-O-Matic.On the DDNS tab under Setup in dd-wrt set DDNS Service to Custom.Now click the "Update Info" radio buttion.Also add account information for any other Dynamic DNS providers you have.Add OpenDNS as a service on DNS-O-Matic.It shares the same username and password for OpenDNS. Also enable any filtering options you want. Setup an account with OpenDns and Enable dynamic IP update under the settings tab on the OpenDNS website.Follow instructions for basic setup above.Their DNS-O-Matic will relay the request to OpenDNS and also optionally forward this to any number of additional Dynamic DNS providers. OpenDNS provides an additional service for users with Dynamic DNSs. OpenDns with DNS-O-Matic for users with a Dynamic IP In the Additional DNSMasq Options text box, enter.Ensure Query DNS in Strict Order is selected.Go to Services tab » Services sub tab » Services Management section » DNSMasq sub section.Option 2 - Configure DNSMasq for OpenDNS DNS forwarding Go to Services tab » Services sub tab » Services Management section » DNSMasq sub section and ensure Query DNS in Strict Order is selected.Tip: If you want the DNS servers to be queried in the order they're listed rather than randomly: To ensure that all devices are restricted by OpenDNS Web Content Filtering you should configure all 3 Static DNS entries using the OpenDNS IP's. ![]() Note: OpenDNS also has these DNS IP's that can be used for the 3rd Static DNS: 208.67.222.220 and 208.67.220.222.Another DNS server of your choice (Do not duplicate one of the first two DNS's or it will default to 0.0.0.0).10.0.0.0 (a non-usable IP) if you don't want to use any other servers or.0.0.0.0 to fall back to your ISP DNS if OpenDNS is unresponsive or.Depending on the behavior you want, set Static DNS 3 set to:.Go to Setup tab » Basic Setup sub tab » Network Setup section » Network Address Server Settings (DHCP), and:.Go to Setup tab » Basic Setup sub tab » WAN Setup section » WAN Connection Type, and check "Ignore WAN DNS".Option 1 - Configure DHCP with OpenDNS DNS servers The advantage option 2 is that you will not lose internal DNS resolution on your network. This can be done in two ways: You can either configure your router to hand out the OpenDNS DNS addresses to your DHCP clients, or you can configure DNSMasq to forward all DNS requests sent to your router to OpenDNS. In order to configure dd-wrt with OpenDNS you need to specify the OpenDNS DNS servers in the control panel. 2 OpenDns with DNS-O-Matic for users with a Dynamic IP.
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