OpenDNS is a free DNS (Domain Name Server) service which makes internet browsing safer and allegedly faster. By simply using their DNS servers instead of your ISP's you are automatically protected from their list of Phishing websites. However, in order to restrict a variety of adult website content you will need to create a free account with them, register your IP address and select the categories you want restricted (i.e. sexuality, nude, pornography, lingerie, grotesque, etc...). Since most of us have DHCP assigned WAN IP addresses that change periodically we need to instruct our router to tell OpenDNS what our new IP address is when it changes. We will go over that below.
On the Setup tab under Network Address Server Settings (DHCP) look for Static DNS 1 and Static DNS 2
Set Static DNS 1 to 126.96.36.199 and set Static DNS 2 to 188.8.131.52
Apply Settings and go to the Services tab
Under DNSMasq put strict-order in the Additional DNSMasq Options text box
Apply Settings again
OpenDns with DNS-O-Matic for users with a Dynamic IPEdit
OpenDNS provides an additional service for users with Dynamic DNSs. Their DNS-O-Matic will relay the request to OpenDNS and also optionally forward this to any number of additional Dynamic DNS providers.
Follow instructions for basic setup above.
Setup an account with OpenDns and Enable dynamic IP update under the settings tab on the OpenDNS website. Also enable any filtering options you want.
Log into DNS-O-Matic. It shares the same username and password for OpenDNS.
Do note that many major websites, download hosts and media sites are now using content delivery network. These network will resolve an IP that is closest to you for performance. Typically, when you use your ISP's DNS server, you will get an IP address within or close to your ISP's network.
If you choose to use OpenDNS, you will get IP addresses that are optimal to OpenDNS' network but maybe far away from your network. This will have performance impact for sites that are using content delivery networks.