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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2
votes
2answers
2k views

CloudFlare CDN and static site with root on Amazon S3

I've set up an S3 bucket to host my static site. Now I am trying to wrap CloudFlare around this, but I get the following warning when adding a CNAME entry for the root domain in CloudFlare's DNS ...
3
votes
1answer
4k views

Cloudflare, reverse DNS and php mail ending up in spam folder

I've been using Cloudflare to host my DNS, and PHPMailer to send e-mail through ZOHOs SMTP servers with great success, but have found that all my e-mails are hitting Gmail, Zoho and Hotmails spam ...
4
votes
1answer
2k views

How secure is CloudFlare's basic SSL

CloudFlare's basic SSL package provides SSL encryption for you site, but only between your customer's browser, and the CloudFlare server where SSL is terminated. The connection between CloudFlare and ...
0
votes
1answer
560 views

SSH to a server with multiple reverse DNS entries [duplicate]

While SSHing into my server with an RSA key, I get this message: Address 255.100.236.105 1 maps to a1.example.com, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT! Even ...
7
votes
2answers
4k views

Setting up CloudFlare with Route 53?

I'm trying to get CloudFlare to sit in front of Route 53. I have my main web server on an ELB (which doesn't have an IP address). CloudFlare needs an IP for an A record, so how can I accomplish this?
0
votes
1answer
182 views

isup.me reported site down but I still can access website like normal

I have nginx as backend running WordPress (with w3tc cache plugin installed), varnish as reserve caching proxy, and cloudflare set up. Sometimes, I see isup.me reported my website is down but in fact ...
0
votes
2answers
615 views

Wordpress feed does not update after APC and Cloudflare

I am running a Wordpress site on a Ubuntu server. I installed APC and setup Cloudflare. After that I started having a strange problem with the feed. When I check the feed on the browser, I can see ...
0
votes
1answer
372 views

Sendmail Modifies Recipient Address from DNS Lookup

CentOS 5.8 box (Unitrends Appliance) with stock Sendmail sendmail-8.13.8-8.1.el5_7. If we email to normal addresses from the box (we have two boxes both doing the same thing) everything is fine. If ...
0
votes
1answer
4k views

Resolving CloudFlare DNS related mail delivery problems

I recently started using CloudFlare and am having a few teething problems. Our domain is netlanguages.com and while we have a lot of sub-domains listen, we are currently only trialling a few of the ...
-5
votes
1answer
582 views

Protect dedicated server with cloudflare [closed]

I have an Ubuntu 10.04 based dedicated server with LAMP installed. I host several websites, but for now all websites are on same IP, configured using Apache Virtual Hosts. Everyone can attack my ...
2
votes
4answers
2k views

Statically mirroring a heavy trafficked site, CloudFlare as DNS

I run a fairly heavy trafficked website and due to some unfortunate incidents the machines that are in my cloud at Linode went down. And I have only a single Load Balancer machine exposed to the ...
1
vote
1answer
118 views

How to setup a “server is down” message like Reddit and Twitter does? [closed]

I have a VPS with our Ubuntu LoCo Team's blog, but I want to setup a message that says the server is down when it happens, like Reddit and Twitter does. For example, if I restart the server or my VPS ...
0
votes
3answers
825 views

Two DNS service providers

Is there a way to have two DNS service providers? I have DNS Made Easy account and Cloudflare but I want to use both. My domain registrar has nameservers pointing to DNS Made Easy How would this ...
0
votes
1answer
811 views

CloudFlare; getting rid of the direct-connect subdomain

I'm right now trying to get rid of the direct-connect subdomain which gets added automatically and is not visible in the CloudFlare DNS panel. I've read about it here; ...
10
votes
5answers
3k views

Using namecheap dns with cloudflare

Since CloudFlare doesn't provide E-mail forwarding I need to leave my DNS management on Namecheap. What DNS records (A,CNAME,...) would I need to point to CloudFlare (and to where) to be able to ...
3
votes
1answer
1k views

iptables - drop all HTTP(S) traffic but from CloudFlare

I would like to allow only HTTP(S) traffic coming from CloudFlare. In that way attackers cannot attack the server directly. I know CloudFlare is not mainly a DDoS mitigator, but I would like to try ...
1
vote
1answer
548 views

DNS subdomain catch-all linking to my external address

First of all, I'm not that into DNS, so maybe the answer to this question is very obvious, sorry in either way. What I want is this: A DNS record which catches all non-existing subdomains on my site ...
2
votes
1answer
587 views

Using Varnish (only) for DDoS mitigation [duplicate]

My VPS is suffering from a (D)DoS doing a SYN flood with spoofed IPs. I'm right now searching from ways how to be able to defend (at least a bit) against it. It's running a DirectAdmin apache2 ...
0
votes
1answer
255 views

Configuration issue with HttpRealipModule (CloudFlare) in nginx configuration file

I've been attempting to use HttpRealipModule with the CloudFlare IP range in my main nginx configuration file but upon restarting nginx I'll just get a standard `"configuration file ...
0
votes
1answer
599 views

AWS EC2 - Present UK IP address for outgoing requests from server in AWS Ireland data centre

We have an application that monitors client websites and does some crawling. We're looking to move the application to existing EC2 servers that we run, but testing suggests that we're going to have ...
0
votes
1answer
414 views

DNS nameserver with cloudflare

I originally bought a domain from namecheap.com then I bought hosting at inmotionhosting, where I pointed the DNS from namecheap to inmotionhosting... now I signed up with cloudflare and pointed DNS ...
1
vote
1answer
2k 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, ...
2
votes
1answer
5k views

Setting an SPF/DKIM record with CloudFlare

What is the correct way to setup an SPF record? Use TXT and add the following? v=spf1 a mx include:mydomain.tld ~all UPDATED: After using the following: v=spf1 a mx ~all I get this: ...
1
vote
0answers
706 views

nginx 502 bad gateway some files

im using cloudflare. my site working good but not loading any images, css files and js files. my server details; ubuntu 12.04 nginx/1.1.19 php5-fpm mysql you can check live here Check with www and ...
0
votes
1answer
113 views

CloudFlare dashboards empty, or performance issues

I wanted to test CloudFlare performance so I set my image gallery domain on it and started testing. I have added PageRules for caching. And chose the Security: Essentially Off. I checked NS check ...
2
votes
2answers
902 views

Correct usage of whitelisting cloudflare IPs in iptables

I'm relatively new to using the command line so I'm understandably nervous about fiddling around with IP tables and accidentally doing something wrong which consequently opens up vulnerabilities in ...
2
votes
2answers
708 views

iptables with Cloudflare

I'm using fail2ban to block web vulnerability scanners. It is working correctly when visiting the site if CloudFlare is bypassed, but a user can still access it if going through it. I have ...
0
votes
1answer
1k views

Fail2Ban adds iptable rules but they are not working?

Fail2Ban just blocked my IP for 3 SSH attempts. It added the iptables rule and I can see it using the "sudo iptables -L -n" command. But I can still access the site and login through SSH! What might ...
0
votes
3answers
915 views

How To go fully IPv6 with Cloud Flare, a web server with both ipv4 and ipv6?

I have setup an Nginx server in a machine which have both ipv4 and ipv6 addresses. Currently, its connected to CloudFlare and only use ipv4. I have 1 ipv4 address assigned to the web server. Now what ...
0
votes
1answer
625 views

Show original ip with cloudflare

I installed nginx and the HttpRealipModule to get the original ip of my visitors.I also add this in the http{ } part in my nginx.conf set_real_ip_from 204.93.240.0/24; set_real_ip_from ...
1
vote
3answers
3k 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 ...
3
votes
2answers
2k views

CloudFlare offers DNS root CNAMEs. Any resolution gotchas to be aware of?

I'm not that familiar with the inner workings of DNS, preferring to just add my CNAMEs and A records as appropriate, and leave the behind the scenes to other services. I host a few sites on Amazon S3, ...
1
vote
1answer
687 views

Using CloudFlare with a mirror site

I am developing a mirror website (where people can download files, sort of like a FTP). I was wondering about using CloudFlare to help cut down on bandwidth usage. I have the mirror website with ...
0
votes
1answer
151 views

powweb and cloudflare

I am using powweb as hosting provider and cloudflare as free cdn. Its been few weeks since my website is down and it says "website down, no cache version available". And to add more to it, I cannot ...
0
votes
2answers
531 views

Files will not update after setting up Cloudflare

I setup cloud flare for and tried it out, it messed up my entire site by caching pages and sending the same page over and over (I use ajax and call the page over and over). I took it off and switched ...
7
votes
2answers
4k views

Using dd-wrt Dynamic DNS client with CloudFlare

I'm trying to configure Dynamic DNS client on my router with dd-wrt (v24-sp2) firmware so it would dynamically change IP address in one of the DNS records. Unfortunately I encountered a problem… Here ...
3
votes
2answers
2k views

How does CloudFlare protect a web site?

I am a little confused about the protection CloudFlare offers. I am directing the www subdomain through CloudFlare with an Orange Cloud, and another subdomain (let's say direct) with a Grey Cloud. But ...
0
votes
1answer
2k views

DNS takes forever - Using Pingdom

So I am using the new CloudFlare.. I have a GoDaddy shared hosting account, which i know isn't the fastest in the world, but DNS seems very slow. I have a Wordpress blog configured as the following: ...
3
votes
1answer
308 views

Iptables list doesn't persist across restarts

I am trying to white list CloudFlare's IP addresses on my server by issuing these: iptables -N whitelist iptables -A whitelist -s 204.93.177.0/24 -j ACCEPT iptables -A whitelist -s 199.27.128.0/21 -j ...
0
votes
1answer
305 views

Cloudflare performance, ddos [closed]

I have been using cloudflare CDN on my website (wordpress) for about 4 months, mostly because I was hoping the CDN would make things faster, and make the load on my cheap server somewhat smaller, ...
0
votes
1answer
169 views

Usefulness of CloudFlare for clients of Argentina [closed]

We are currently hosting an important site in the US with a CloudFlare pro subscription. Since most of the people that visit the site are from Argentina, we are considering migrating the server to ...
1
vote
2answers
2k views

Cloudflare hurting performance

I recently set up cloudflare on a new site I'm about to launch. I ran some benchmarks with it on and with it off and the output is extremely troubling. Does this make sense to anyone? Before when ...
1
vote
2answers
2k views

Cloudflare and Cache-Control

I am experimenting with Cloudflare, mainly to relief the load of my webserver in peak moments. I just signed up and it seems to be working (all my traffic is being proxied) but Cloudflare does not ...
2
votes
1answer
1k views

AWS Free Usage Tier + Cloudflare… possible?

If I throw my MySQL/PHP app up on a Amazon EC2 instance (using their AWS Free Usage Tier program) and couple it with CloudFlare (the free plan of course) roughly how many daily visitors can I ...
0
votes
1answer
204 views

Free Web Forwarding without Nameservers

I have a site running Google App Engine and using CloudFlare (a free CDN proxy, using its own nameserver). This leaves me with no options for the root domain. App Engine does not support naked ...