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Questions tagged [cloudflare]

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

513 questions
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HTTPS access to S3 bucket through Cloudflare

I'm trying to use Cloudflare to provide https access to an s3 bucket. I've setup the CNAME entry in Cloudfront with pointing to the bucket and I've verified I can access it via http but when I try and access the contents with https, I get a 521…
sgargan
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Set $REMOTE_ADDR to real client IP

I am hosting a WordPress site on Heroku with Nginx. DNS is behind CloudFlare. My WordPress plugins reports Heroku IPs instead of real client IPs. I have the following Nginx rules: location / { try_files $uri $uri/ /index.php?$args; …
tangrufus
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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 number of these: 2014/12/04 03:39:31 [crit] 24383#0:…
Julian H. Lam
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How to make a domain receiving email behind cloudflare?

I have a web server hosting multiple domains (centos + postfix + dovcot), one of my domain its dns is hosted on cloudflare (ie. abcd.com), but when I use gmail to send email to a user@abcd.com, user@abcd.com will not be able to receive the email.…
hkguile
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How to add reverse dns record on cloudflare

I need to set PTR record on my cloudflare account, because all outgoing mails are going to spam. I do not see ptr record in my cloudflare account. Can I use txt/srv record instead?
Anom
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How does Cloudflare know about my Subdomains?

I just signed up Cloudfare and they showed me a list of my subdomains by scanning my domain. How do they do this? What technology is used to scan all subdomains related to a root domain?
Isabella Wilcox
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nginx and cloudlfare ip confusion?

I am using the below config in http block of my nginx.conf to get real ip while using Cloudflare acceleration service: ## Cloudflare settings to get Real IP's set_real_ip_from 204.93.240.0/24; set_real_ip_from 204.93.177.0/24; …
iTech
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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 folders. When I disabled Cloudflare's DNS hosting,…
Joseph Szymborski
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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 outside world (one IP). Also my site is a candidate…
Quintin Par
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is cloudflare now using let's encrypt certificates for edge?

i just added a new domain to cloudflare and the edge certificate is let's encrypt r3, shown in control panel and by inspecting in browser when on the domain's website. my existing domains still have the regular 1-yr certs. wonder if they'll switch…
rvh
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Why cloudflare returns two different formats of the same images even when both are HIT

I have turned on Polish in Cloudflare. When the image is first download in chrome (Version 75.0.3770.142 (Official Build) (64-bit) in OSX), chrome dev console shows the following info: * age: 12286 * cache-control: public, max-age=31556926 * cf-bgj:…
Anthony Kong
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rDNS issue in Cloudflare and AWS ec2 instance

I have installed centos7, whm/cpanel and mailwizz on amazon ec2 instance, managing DNS through cloudflare.com. Everything is fine i have issue with rDNS even i have created PTR records in Route53 and WHM. WHM still shows following issue with PTR in…
Wasif
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Terminating SSL at Cloudflare level. Do I get performance gains?

I saw in a post that terminating SSL at Cloudflare level and HTTP only traffic from Cloudflare to origin gives a performance boost since SSL is negotiated only at the edge. I run a website (mostly static) where security is not a paranoid concern.…
Quintin Par
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How to I point Cloudflare to my ELB on Amazon?

I'm trying to point Cloudflare to my ELB on Amazon, but haven't found any good information about how to do this. The closest I found is this page:…
valter
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getting ERR_SSL_VERSION_OR_CIPHER_MISMATCH on nginx webserver via cloudflare

I have a docker infrastructure consisting of 1 nginx reverse proxy 1 nginx web server 1 php7.0 fpm server both the nginx reverse proxy and webserver are using the same docker image but just loaded with different site confs. On the reverse proxy it…
user618509
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