blocks|key|519158|text|据我所知，这样的强制更新是不可能的。如果您的名称服务器服务提供商允许的话，您可以通过在更改条目之前减少TTL+(Time)值来减少DNS停机时间。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|519159|这是一个较少痛苦的DNS更改指南。|offset|length|519160|不过，一个公平的警告--并不是客户端和权威(原名)服务器之间的所有名称服务器都会强制执行您的TTL，它们可能有自己的缓存时间。|519161|entityMap|0|LINK|mutability|MUTABLE|url|http://www.dnswatch.info/articles/dns-update^0|0|4|C|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@$D|R|E|S|1|T]]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

As far as I know, a forced update like this is not directly possible. You might be able to reduce the DNS downtime by reducing the TTL (Time-To-Live) value of the entries before changing them, if your name server service provider allows that.

Here's a <a href="http://www.dnswatch.info/articles/dns-update" rel="noreferrer">guide for less painful DNS changes</a>.

A fair warning, though - not all name servers between your client and the authoritative (origin) name server will enforce your TTL, they might have their own caching time.

blocks|key|2691511|text|没有保证可以强制用户清除DNS缓存，这通常是由他们的ISP在他们的操作系统上完成的。更新的DNS传播时间不应超过24小时。最好的选择是通过使用类似于Apache的mod_proxy来创建新服务器的反向代理，从而实现对用户的无缝转换。这将导致对旧服务器的所有查询仍然返回正确的结果，几天后，您将可以自由地删除反向代理。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2691512|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

There's no guaranteed way to force the user to clear the DNS cache, and it is often done by their ISP on top of their OS. It shouldn't take more than 24 hours for the updated DNS to propagate. Your best option is to make the transition seamless to the user by using something like mod_proxy with Apache to create a reverse proxy to your new server. That would cause all queries to the old server to still return the proper results and after a few days you would be free to remove the reverse proxy.

blocks|key|519187|text|您不能强制刷新，但可以将所有旧ip请求转发到新请求。对于一个网站：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|519188|用旧服务器的ip替换OLD_IP|519189|用新服务器的ip替换NEW_IP|519190|跑和赢。|519191|回声"1“>/proc/sys/net/ipv4+4/ip_forward|519192|iptables+-t+nat+-A+PREROUTING+-d+OLD_IP+-p+tcp+-dport+80+-j+DNAT+-to-目的NEW_IP:80|519193|iptables+-t+nat+-A+PREROUTING+-d+OLD_IP+-p+tcp+--dport+443+-j+DNAT+-to-目的NEW_IP:443|519194|-t+nat+-A修饰-j伪装|519195|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|V|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|W|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|X|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|Y|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|Q|$]]

you can't force refresh but you can forward all old ip requests to new one.
for a website:

replace [OLD_IP] with old server's ip 

replace [NEW_IP] with new server's ip

run &amp; win.

echo "1" > /proc/sys/net/ipv4/ip_forward

iptables -t nat -A PREROUTING -d [OLD_IP] -p tcp --dport 80 -j DNAT --to-destination [NEW_IP]:80

iptables -t nat -A PREROUTING -d [OLD_IP] -p tcp --dport 443 -j DNAT --to-destination [NEW_IP]:443

iptables -t nat -A POSTROUTING -j MASQUERADE

blocks|key|2691602|text|因此，如果问题是，您只是创建了一个网站，您的客户或任何给定的ISP+DNS缓存，并没有显示新的网站。是的，所有其他东西都适用于ipconfig、重置浏览器等，但是这里有一个想法，我不时地做一些事情。可以在NIC属性的tcpip属性中设置备用网络ISP的DNS。因此，如果您的ISP是telstra，而且它还没有传播或更新，您可以在那里指定另一个服务提供商dns。如果在您的本地域名之前更新了isp+dns，那么您将看到新的site.But，您可以做许多其他的技巧来确定传播和在DNS更新之前让邮件工作。如果有人想聊天的话就给我打个电话。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2691603|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

So if the issue is you just created a website and your clients or any given ISP DNS is cached and doesn't show new site yet. Yes all the other stuff applies ipconfig reset browser etc. BUT here's an Idea and something I do from time to time. You can set an alternate network ISP's DNS in the tcpip properties on the NIC properties. So if your ISP is say telstra and it hasn't propagated or updated you can specify an alternate service providers dns there. if that isp dns is updated before your native one hey presto you will see new site.But there is lots of other tricks you can do to determine propagation and get mail to work prior to the DNS updating.
drop me a line if any one wants to chat.

blocks|key|2691631|text|可以完全删除区域记录，然后完全按照您的需要重新创建它。也许这会迫使一个完整的传播。如果我错了，有人告诉我，我会删除这个建议。另外，我不知道如何保存一个区域记录，并使用WHM或任何其他工具重新创建它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2691632|我知道，当我今天删除一个托管帐户并重新创建它时，原始的区域记录似乎立即从我的计算机上传播到DNS解析器上。这是很好的证据，它有效。|2691633|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

It might be possible to delete the Zone Record entirely, then recreate it exactly as you want it. Perhaps this will force a full propagation. If I'm wrong, somebody tell me and I'll delete this suggestion. Also, I don't know how to save a Zone Record and recreate it using WHM or any other tool.

I do know that when I deleted a hosting account today and recreated it, the original Zone Record seemed to be propagated instantly to a DNS resolver up the line from my computer. That is good evidence it works.

I'm moving my web application to another server and in the next few days I'll refresh the DNS to point to the new IP location.

Unfortunately some browsers and SOs keep a DNS cache that will make users point to the old IP location. Some users are rookies and they'll not refresh the DNS cache manually and I know we'll lose a lot of them in the first weeks after this change.

Is there anyway to force this DNS cache to refresh so it'll be transparent for our final users?

How to force DNS refresh for a website?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我将把我的web应用程序移到另一台服务器上，在接下来的几天里，我将刷新DNS以指向新的IP位置。不幸的是，一些浏览器和SOs保留了DNS缓存，这将使用户指向旧的IP位置。有些用户是新手，他们不会手动刷新DNS缓存，我知道在更改后的头几周我们会损失很多。有没有强制这个DNS缓存刷新，以便对我们的最终用户是透明的？

问如何强制对网站进行DNS刷新？
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回答 5

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