Category:Open DNS Resolvers: Difference between revisions
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==What is an Open DNS Resolver?== |
==What is an Open DNS Resolver?== |
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Every day, all the time we all use DNS to look up names and IPs on the Internet - ie, when you put bbc.co.uk in your browser, your computer needs to look up the IP address of the BBC's web server. To do this it will use DNS. The DNS server will respond back to your computer with the information. |
Every day, all the time we all use DNS to look up names and IPs on the Internet - ie, when you put bbc.co.uk in your browser, your computer needs to look up the IP address of the BBC's web server. To do this it will use DNS. The DNS server will respond back to your computer with the information. |
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This is often referred to as 'DNS Amplification Attacks'. |
This is often referred to as 'DNS Amplification Attacks'. |
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==What if I run a DNS server on purpose?== |
==What if I run a DNS server on purpose?== |
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It is quite legitimate for people to run DNS servers on their Network - in these cases, then access to them should be restricted or limited. |
It is quite legitimate for people to run DNS servers on their Network - in these cases, then access to them should be restricted or limited. |
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If you run a Caching resolver, configure it to only return records for your users (firewall to only allow your users). |
If you run a Caching resolver, configure it to only return records for your users (firewall to only allow your users). |
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=How to Fix Routers?= |
=How to Fix Routers?= |
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