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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!

Category:Open DNS Resolvers: Difference between revisions

Category:Open DNS Resolvers (view source)

Revision as of 13:11, 20 September 2013

16 bytes removed ,  20 September 2013
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m (Reverted edits by AA-Andrew (talk) to last revision by CecilWard)
Every day, each time we use DNS to look up names and IPs on the Internet - eg. 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.
 
[[AAISP]] customers normally use the [[AAISP]] DNS servers, or often their own router.
 
It is quite common for DSL routers to respond to these DNS requests on the WAN side as well as the LAN - this means that other people on the Internet can use your router to do their DNS lookups. It also means that 'attackers' can take advantage of this and use your router to attack someone else. This will use up bandwidth on your line.
 
=Testing for open resolvers=
There is a page on the [[AAISP]] control pages that lists your IPs that have an open DNS server running, and can also re-scan your IP blocks (IPv4). [[AAISP]] will re-scan automatically every month and will alert customers by email if an open DNS resolver is found.
 
Log in to the [https://clueless.aa.net.uk/ Control Pages], and then either click on one of your IPv4 addresses or a broadband line. On these pages you'll see a link to the open DNS page.
AA-Andrew
autoreview, Bureaucrats, editor, Interface administrators, reviewer, Administrators
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