# 更新后因 Cloudflare 设置导致空白页/错误

**URL:** <https://meta.discourse.org/t/blank-page-error-after-updating-due-to-cloudflare-settings/101750>\
**Category:** Product Support\
**Created:** [2018 年11 月 10 日 18:33 UTC](https://meta.discourse.org/t/blank-page-error-after-updating-due-to-cloudflare-settings/101750 "2018-11-10T18:33:24Z")\
**Posts on this page:** 1\
**Showing post:** 10

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作者： ![e9e61d50](https://avatars.discourse-cdn.com/v4/letter/e/e9a140/32.png) [@e9e61d50](https://meta.discourse.org/u/e9e61d50)\
发布日期： [2018 年11 月 10 日 20:40 UTC](https://meta.discourse.org/t/blank-page-error-after-updating-due-to-cloudflare-settings/101750/10 "2018-11-10T20:40:36Z")

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> [@Stephen](#):
>
> For now it’s a diagnostic step. It doesn’t significantly elevate risk unless you’ve increased the attack surface of your server and done some very silly things. There are no nefarious ‘crawlers’ out to get you, the period of time this would be done for is minimal.
> 
> Your server isn’t protected by Cloudflare, it actually does nothing to protect the server itself, it only proxies the FQDN, the server IP is still as vulnerable with or without it turned on. The kinds of attack you should be worried about are bots scanning entire subnets of machines, which priorities the ranges allocated to VPS services.

I respectfully disagree with you. There are in fact crawlers whose job is to continuously crawl domains, resolve the IP and log the DNS info. In fact, it’s a huge market.

If you use Cloudflare properly, no one should ever know your servers true IP. Hence, it’s security through obscurity. I could give you a domain which has properly used Cloudflare and even the class B subnet the server is on and I doubt you will be able to correlate the two, unless of course, you slip and create an A record which has the servers true IP in it, which will get logged very quickly.

Use discourse itself as an example, how do you think this passive DNS is available?  
[https://viewdns.info/iphistory/?domain=discourse.org](https://viewdns.info/iphistory/?domain=discourse.org)

I digress, the intent of this topic is derailing. If you would like to discuss passive DNS, crawlers and opsec. I will be happy to do so in another category/thread.

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