How to propagate faster subdomains through web proxies

[cadbilbao]

Hi.

Usin Bind 9.2.4, I created a subdomain on my DNS server, by adding a line at
'/var/named/zone/mydomain.com':
-----------
foo A 82.194.72.73
-----------

I restarted Bind, and waited 48 hours. After them, I was able to access
'foo.mydomain.com' with my web browser from my office. And I also checked
'foo.mydomain.com' with two services:

http://www.danvine.com/icapture/

http://www.anonymizer.com/

However, my customer wasn't able to see it. They use a proxy server to access
the Internet from their offices, and I guess this proxy server didn't update
the subdomain (thought it was a brand new one).

Could anybody explain me how to propagate faster the subdomains and how to
avoid proxy servers doesn't update them?

Thank you very much.

 

[elgrandeperro]

First, you aren't creating a subdomain, this is a simple A record.

Second, if it is a NEW entry, then there is no reason for the proxy servers to fail. If it is a changed entry, then the TTLs might inhibit the update.

I would first check your DNS secondary to make sure it got the update.

In order to effectively change an entry, the method is to scroll down your TTL before you change. That way your old DNS entry will time out, and require reissue of the query.
You need to start scrolling down well before your TTL expire time. If for instance it is a TTL of a week and you start scrolling down a day before, that isn't going to do you any good because the entry will be cached for 6 days by
some DNS servers.

gene