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我的一些客户在访问映射到 GAE 应用程序的自定义域时遇到问题，他们收到 HTTP 404 错误。

对我来说奇怪的是，通过http://dziennikel.appspot.com URL 访问应用程序时，他们从来没有遇到过同样的问题。

我对他们的机器没有物理访问权限，但一些远程调试指向他们 ISP 网络中某个级别的陈旧 DNS 缓存。

AFAIK 我已经正确设置了 CNAME（我的口味 TTL 很短）：

host                 type   destination     priority  TTL
app.dziennik.edu.pl  CNAME  ghs.google.com  10        3600

域已在我的 Google Apps 面板中正确映射，并且对我和我的大多数客户来说都可以正常工作。

我想知道是否有某种方法可以提高可靠性、降低 TTL 或者将目的地添加/更改为其他东西（例如dziennikel.appspot.com）。这方面的指导方针是什么？您的应用程序使用哪些映射设置？

PS。我知道这与编程无关，但 GAE 支持已移至此处，并且筛选 Google Apps 支持文档没有给出任何线索。

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First, assuming all of the properties are as you desire, I recommend setting your DNS settings and not mess around with them any further. Yes, you can lower you TTL value (which is currently set to an hour) but if your settings won't change in the future, this isn't a problem.

How long has this been a problem? I know this isn't a direct answer, but I can state from experience that I've never had a perfect experience setting up domains with my App Engine applications and I've done it 4 times.

My recommendation is to verify that your settings are correct on your DNS and wait it out for 48 hours. If that doesn't solve the problem. If your domain still misbehaves, you may request that your customers contact their ISP but that could cost your customers if their ISP doesn't offer free support.

于 2012-05-25T16:17:49.673 回答