All the links rom iamcal.com 2012-07-10T20:31:00Z Flickr tag:iamcal.com,2005:/blog/10003/ 2012-07-10T20:31:00Z 2012-07-10T20:31:00Z <p>If your application uses getaddrinfo instead of gethostbyname (for IPv6), DNS round robin <a href="http://daniel.haxx.se/blog/2012/01/03/getaddrinfo-with-round-robin-dns-and-happy-eyeballs/">will not work</a>. Urgh. Recently found this as the cause of our Java app only connecting to half of the hosts in our AWS ELB.</p> Cal Henderson http://www.iamcal.com/ tag:iamcal.com,2005:/blog/2618/ 2011-03-10T06:30:00Z 2011-03-10T06:30:00Z <p>dns prefetch can be a <a href="http://www.pinkbike.com/news/DNS-Prefetching-implications.html">big deal</a> for sites that give a subdomain per user</p> Cal Henderson http://www.iamcal.com/ tag:iamcal.com,2005:/blog/2556/ 2010-09-13T06:20:00Z 2010-09-13T06:20:00Z <p>i can never find the dnslint tool that i really liked, but the opendns <a href="http://www.opendns.com/support/cache/">cache tool</a> is a bit useful</p> Cal Henderson http://www.iamcal.com/ tag:iamcal.com,2005:/blog/1695/ 2008-06-30T22:36:00Z 2008-06-30T22:36:00Z <p>some guys i know had some DNS issues when they switched servers. turns out you need to open port 53 for TCP aswell as UDP. who knew? some details <a href="http://tcpmag.com/qanda/article.asp?EditorialsID=339">here</a></p> Cal Henderson http://www.iamcal.com/ tag:iamcal.com,2005:/blog/1102/ 2005-11-24T03:59:00Z 2005-11-24T03:59:00Z <p>a couple of <a href="http://www.tenereillo.com/GSLBPageOfShame.htm">great</a> <a href="http://www.tenereillo.com/GSLBPageOfShameII.htm">articles</a> on the issues involved with gslb. if anyone has any idea how akamai's freeflow/edgesuite claims to provide dc failover in around a minute i'd live to know - dns trickery or route convergence?</p> Cal Henderson http://www.iamcal.com/ tag:iamcal.com,2005:/blog/873/ 2005-04-11T17:32:00Z 2005-04-11T17:32:00Z <p>of course, someone has already set up a <a href="http://www.makeyougohmm.com/20050327/1627/">public portal</a> and dns server to help you avoid the hard part of setting it up.</p> Cal Henderson http://www.iamcal.com/ tag:iamcal.com,2005:/blog/248/ 2004-07-13T23:08:00Z 2004-07-13T23:08:00Z <p>good news via salt: verisign to <a href="http://www.theregister.co.uk/2004/07/13/verisign_dns_update/">stop being so shit</a> and update atlas once every 5 minutes instead of 12 hours.</p> Cal Henderson http://www.iamcal.com/