CircleID

Since my last post about DNS subversion we have had some good feedback. We had 29 responses, I agree a small sample, but what we found is very interesting. Let's remind ourselves of what we are looking at? Does your ISP redirect DNS queries? Specifically, if you try to make a port 53 UDP or TCP connection to a server outside of your ISP's network does it get there? Of the 29 responses, so far, it appears that five redirect UDP port 53 and two redirect TCP port 53. This is not at all good, if it is true it is REALLY bad. I have the names of the networks but don't want to publish them until we have confirmed this to be the case. For now all I will say is that the networks that I have questions about are some of the largest in the world. If you want to add to the data set please visit http://www.paulparisi.com/queryproject and input your findings.

Also I should note that I had some great feedback on this post from a fair number of industry experts I look up to. David Ulevitch (of the fantastic OpenDNS service) pointed me to ICSI at Berkeley which has a great tool you should all run. Go to http://netalyzr.icsi.berkeley.edu/ and add to the database. They do some very cool and comprehensive data gathering and as David said, reports will be coming out soon. I am very much looking forward to them.

Also, DNSstuff does have a tool in the works that will help test for this kind of stuff. I will keep you posted.

As an aside — everyone who has responded to the DNS Query Project was great. (OK, all except one person… they were not able to use the web form I provided to input the data… many of you would have thought I ran him off the road. Talk about rage.)

The first person with the correct reference for the title of this article will get a $10 Amazon gift certificate. I will be the sole judge of who wins, so there!

By Paul Parisi, Chief Technology Officer at DNSstuff.com

Related topics: Access Providers, DNS