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#1
May 7th, 2009, 02:27 PM
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Weird IE DNS problem (caching?)
I have a public ip and 3 different domains and will use the following as examples
33.333.33.333 company.com business.com internet.com The first two domain's records (company.com, business.com) are hosted on HOST A's dns servers. The third domain (internet.com) is hosted on HOST B's dns servers. HOST A and HOST B are completely different companies and providers. I have a website hosted on a server. The server has a virtual hosts entry setup so that all 3 domains and their www. prefixed counterparts all resolve to the same ip and site. So there is six total virtual host entries. company.com www.company.com business.com www.business.com internet.com www.internet.com V 33.333.33.333 Using Firefox, Opera, and Chrome, all 6 domains resolve properly and there are no issues. Using IE 6/7/8, the third domain resolves properly for both the root domain (internet.com) and the www. prefixed one (www.internet.com). Using IE, the first two domains resolve properly for the root domains. (company.com, business.com) But for the www. prefixed domains, the sites don't resolve except for the first time and only for the first initial request. Refresh, and the page goes blank. Basically www.business.com and www.company.com resolve to a blank white screen, only on IE, and work fine in other browsers. The third domain, hosted on a different DNS server, works fine across all browsers, even with www. prefix. I would add, that it's not isolate to just the www. prefix, it's any prefix. Any ideas? If I clear the browser cache and history, the www. prefixed domains will resolve for the first request, but then if you refresh, they go white. If I view the source for hte white pages, it has the following <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content="text/html; charset=windows-1252" http-equiv=Content-Type></HEAD> <BODY></BODY></HTML> I don't understand how it can be a dns issue, because ALL domains, even prefixed ones, resolve fine in all other browsers besides IE. I don't see how it's a webserver issue, because the sites respond fine in FF and Opera, and if you don't use the www. prefix in IE. I can telnet to all domains on port 80. The only flag about DNS is that the domain hosted on a different DNS server DOES work completely fine. So it seems isolated to domains hosted on HOST A's dns servers. But for everything except IE, HOST A's dns servers are responding just fine.
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#2
May 11th, 2009, 05:29 PM
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Quote:
You're done a good job of outlining the scenarios that work/don't. I suspect provider A's DNS. I know you've gone to some lengths to anonymize this, but, the output of whois for the domains, and dig for all those hostnames from the corresponding dns servers may be needed to solve this.
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