https://dchua.com/tags/dns/ Recent content in dns on davidchua Hugo -- gohugo.io en-us Thu, 29 Sep 2016 00:00:00 +0000 https://dchua.com/posts/2016-09-29-removing-dns-caching-on-nginx-proxy-pass/ Thu, 29 Sep 2016 00:00:00 +0000 https://dchua.com/posts/2016-09-29-removing-dns-caching-on-nginx-proxy-pass/ If you’re passing hostnames into your nginx’s proxy_pass and made a change to the hostname’s ip address, you might experience times when nginx is still referencing the old ip address despite your DNS TTL having already been expired. This is because nginx caches the ip of all hostnames resolved in its configuration. In order to ensure that any IP change is quickly resolved, you should specify a valid period so that nginx will force a cache refresh on its ip storage. https://dchua.com/posts/2013-08-18-migrate-all-dns-zones-from-zerigo-over-to-aws-route-53/ Sun, 18 Aug 2013 00:00:00 +0000 https://dchua.com/posts/2013-08-18-migrate-all-dns-zones-from-zerigo-over-to-aws-route-53/ So yesterday there was another major downtime on Zerigo and its about the last straw I had with the service. Not only the service was down for most of the day, causing some of my domains to fail updating, not a single e-mail or communication was made on the part of the management team to inform us about what has happened. If I didn’t check zerigostatus.com, I wouldn’t have realized that the entire service was down.