CloudFlare is a content delivery network and distributed domain name server service marketed as improving website performance and speed and providing security.

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Redirect loop using cloudflare's Flexible ssl

I am trying to implement Flexible SSL provided by CloudFlare to my site. Here is my nginx config: # PHP-FPM upstream; change it accordingly to your local config! upstream php-fpm { server ...
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3answers
2k views

Only allowing traffic from Cloudflare

I am new to Linux System Administration and I am experimenting with iptables trying to learn how to really lock down a system with them. And one thing a friend of mine recommended was that there was a ...
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1answer
92 views

Allowing outgoing connections to a particular IP with ufw

I have disabled outgoing connections as a whole with UFW seeing that I didn't want to take chances with my vBulletin forum exposing my server's IP address to attackers (I use CloudFlare). As I've ...
6
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1answer
556 views

Does cloudflare know the decrypted content when using a https connection?

CloudFlare provides ssl support. However, if a visitor visits a website protected by CloudFlare, is CloudFlare able to know the plain data transfered during this visit? There are a few SSL options: ...
1
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1answer
498 views

High # of sockets in TIME-WAIT state, server unresponsive at load

Our app became unresponsive at high loads, with longer wait times. Process usage was abnormally low (~15% CPU utilisation per process, our app runs on 8 processes). Nginx error log output showed a ...
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1answer
648 views

How do I deny all requests not from cloudflare?

I've recently gotten denial of service attacks from multiple proxy ips, so I installed cloudflare to prevent this. Then I started noticing that they're bypassing cloudflare by connecting directly to ...
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1answer
1k views

apxs cannot install mod_cloudflare on centos

[ Linux - CentOS - Apache 2.2 - mod_cloudflare - apxs2 ] I have changed my nameservers to point to CloudFlare. The problem is that all the IP addresses are coming in as CloudFlare's. This is no good, ...