Close open DNS resolver? Richard, This line "ip dns server" doesn't need to be enabled to have your hosts get on the internet, but in fact starts the config for the router to answer dns queries.
Jun 07, 2019 · A DNS resolver, also known as a resolver, is a server on the Internet that converts domain names into IP addresses.. When you use the Internet, every time you connect to a website using its domain name (such as "computerhope.com"), your computer needs to know that website's IP address (a unique series of numbers). CenturyLink Domain Name Server (DNS) Devices connected to the CenturyLink network are automatically assigned a domain name server or DNS. If for some reason you need to statically assign DNS you'll find all the pertinent information below. IP Address Location AS Number Software / Version Checked Status Reliability Whois; 166.130.64.24 mobile-166-130-64-24.mycingular.net. Atlanta 20057 ATT-MOBILITY-LLC-AS20057 2020-07-25 06:40:58 UTC Quick bit of perl code to scan an IP range for open DNS resolvers. I use it to check for misconfigured customer resolvers on my network, so that I can hopefully open a ticket with the customer before they get used as a DDoS multiplier. - find_open_resolvers.pl The Domain Name System (DNS) protocol is an important part of the web's infrastructure, serving as the Internet's phone book: every time you visit a website, your computer performs a DNS lookup. Complex pages often require multiple DNS lookups before they start loading, so your computer may be performing hundreds of lookups a day. Many public or "open" resolvers, as well as some secure resolvers on cloud-based or wide area networks, use NXDOMAIN hijacking. Since the Spamhaus "not listed in our zone" replies are the same as a "webpage not found" reply, users affected by this kind of scheme will always see an IP address returned rather than the correct NXDOMAIN DNS answer. If you plan on using the DNSBL feature, you will need to use the DNS Resolver for your DNS queries, the DNS Forwarder is not an option for DNSBL. Its probably best to ensure that the DNS Resolver is working before using DNSBL. The DNS Resolver is developed by NLnet Labs and is named 'Unbound'. It is a validating, recursive and caching DNS resolver.
An "open DNS resolver" is a DNS server that's willing to resolve recursive DNS lookups for anyone on the internet. It's much like an open SMTP relay, in that the simple lack of authentication allows malicious 3rd parties to propagate their payloads using your unsecured equipment. With open SMTP relays, the problem is that they forward spam.
We also have an easy way for you to find out if your own local DNS resolver is open. If you have the dig command on your system, simply run: $ dig +short amiopen.openresolvers.org TXT
For consistent results all your DNS traffic must go to OpenDNS. "when i check my TCPv4 settings, those ip's are all opendns." This is not true. You will see the full truth only if you click the "Advanced" button and go to the "DNS" tab. You will see two OpenDNS and two Google DNS resolver addresses then. Remove the Google addresses.
A public recursive name server (also called public DNS resolver) is a name server service that networked computers may use for query to the Domain Name System (DNS), the decentralized Internet naming system, in place of or in addition to name servers operated by the local Internet service provider (ISP) to which the devices are connected. I shared a curated list of public DNS resolvers a few weeks ago and got quite a bit of feedback. So I updated it to include all the missing pieces. Note that this is a collection of free and fast Anycast DNS Public resolvers (nameservers) that are available and well tested.