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.

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Nameserver is not updating

I have a domain https://t2evolve.eu on Rootpal. I changed this domain's nameserver many times and waited for 48 hours. But Nameserver is not updating. after changing nameservers I checked them many ...
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Application role in preventing DDOS

I have an application that is being planned to be exposed to internet clients via a reverse proxy deployed in the DMZ, . I have recommended that the deployments use WAF/Cloudflare along with this to ...
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1answer
53 views

Website is not following Cloudflare's Pagerules

I'm using Cloudflare's Page Rules to cache absolutely everything on my site (except ajax.php) for at least 5 days (images, css, js are cached 30 days). Although all web content is set to be cached ...
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Google CDN DDos Mitig [closed]

I am planning to use Google's CDN aka Cloud CDN. Does Cloud CDN include a minor mitigation against DDos attacks, like Cloudflare's free plan? Or do I have to create a security policy first via Cloud ...
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137 views

How to prevent DDOS attack impact on Netlify? (downtime + bandwith usage/cost)

Situation: React app that was initially running on a VPS A few days ago, we were the target of a DDOS attack that took the site down. During the attack, we decided to migrate to Netlify. Once ...
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1answer
59 views

Why is my PC doing more than one DNS query for www.ietf.org? [closed]

I'm doing an exercise for a class where I have to flush the DNS cache and then visit www.ietf.org and capture the packets. I got this: The selected query and response are the "main" ones. ...
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1answer
623 views

How does Cloudflare Firwall rules order work?

how does the order of Cloudflare rules work? I read the documentation but doesn't explain it (it's self explanatory apparently) but is it? For example if i want to block a ASN but allow an IP inside ...
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14 views

What's the behavior of AWS Elastic Beanstalk session stickiness when using Cloudflare?

I have session stickiness enabled in the Elastic Beanstalk console: According to the docs: The load balancer uses a special cookie, AWSELB, to track the instance for each request to each listener. ...
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33 views

502 Bad Gateway Error Cloudflare on random pages - Nginx on Ubuntu

my WordPress website recently started acting up. I randomly get 502 Bad gateway errors on random pages and actions. Sometimes it happens when I modify orders in woocommerce. It mostly happens when I ...
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1answer
16 views

Get origin IP in iptable / ufw

I have a site on Cloudflare. I would like to set up an iptable firewall on the server in addition to Cloudflare, to implement rate limiting (Cloudflare have a paid option ...) Problem: The IP received ...
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42 views

Cloudflare Load Balancer 405 Error on Post Request

I am currently having issues making POST requests to a load-balanced backend. (The load balancer is managed by Cloudflare). Making POST requests directly to the individual servers does not cause any ...
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How can we manage a single subdomain with Cloudflare while the root domain is managed by Route53?

We'd like to use Cloudflare to manage a specific subdomain, for instance foo.example.com. The domain itself, example.com, is otherwise managed by Route53 and we'd like to continue to leverage Route53. ...
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35 views

Can you hide a web server location using CloudFlare?

I am in the UK and looking for a new server for my websites. Pricing in the UK is really expensive but I stuck with the UK as that is where my main audience is. I noticed that with providers like ...
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38 views

High CPU Usage on Digital Ocean Web Server

We have a Laravel website which is currently hosted on Digital Ocean (Nginx). The droplet is a 2 vCPUs, 2 GB Memory, 60 GB SSD, 3 TB transfer running PHP 7.4. We are seeing a steady increase in CPU ...
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48 views

Can CDN caching prevent DoS attacks?

Let's say I use Cloudflare to cache my images, CSS, and JS files. Requests for the HTML content itself still hit my server and an attacker could use that to his advantage. However, if I tell ...
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46 views

Cloudflare + Apache + CSP Headers: Old CSP headers are returned

We are using apache2 on our server, which is behind cloudflare (free plan). I am currently implementing googles recaptcha, which requires me to make changes to our CSP headers. What I did: Change CSP ...
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79 views

Why is UFW Blocking CloudFlare IP's when I've Whitelisted their ranges?

I have a script below that I use to grab the latest CloudFlare IP addresses and add them to a UFW Allow rule. #!/bin/bash ranges="$(curl -s https://www.cloudflare.com/ips-v4) " ranges+=$(...
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56 views

Cloudflare CF-IPCountry header wrong with reverse proxy

my website use cloudflare. It has two parts: 1 - api, made with php 2 - frontend, nuxt js reverse proxy I use Cloudflare's "CF-IPCountry" header in order to detect the client country code. ...
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23 views

Website showing correct content in browser but wrong when google fetches it. Can it be a caching issue?

We use cloudflare caching for our massive site which has hundreds of thousands of pages. The site is a news site built in wordpress and most assets are static and suitable for caching. We had a ...
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1answer
103 views

Installing Matomo on Nginx returns 502 Bad Gateway Error

I'm in the process of installing the Matomo Analytics platform on my Debian 10 server, running Nginx and using the Cloudflare DNS and CDN. Unfortunately I get a 502 Bad Gateway error when trying to ...
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124 views

Is PageSpeed & Pingdom testing through CloudFlare accurate?

In this SCENARIO: A website that routed through CloudFlare with standard Caching enabled: Are there any known issues with testing that with Google PageSpeed or Pingdom's speed test? SYMPTOM When I ...
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27 views

How can I run a TraceRt as if I were at another IP address?

I'm trying test whether my hosting company is blocking traffic from certain IP addresses*. I'd like to confirm that by running a TraceRt between the Cloudflare server IP and our server's IP address. *...
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87 views

Argo Tunnel certificate causing strange “not signed” issue

Before Argo Tunnels I had the following setup for a particular service running on my local network: DNS entry added to point to my home IP address (test.domain.xyz » 1.2.3.4) Port 443 opened in my ...
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2answers
164 views

AWS SOA record from AWS to Cloudflare

I purchase a domain with AWS to try it out and edited the NS records with CloudFlare records, but I also have another entry for SOA, this is it: Record type SOA – Start of authority record ns-501....
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80 views

Is it possible to block or allow SSH connections to a server on Cloudflare

I want to restrict SSH connections to my server to a country only. I tried GeoIP and Ipfilter without success (Location of authpriv.notice logs on Bitnami). Another solution would be to configure a ...
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84 views

Custom subdomain support with Cloudflare DNS and Netlify Pages

I have a saas app say abc.com serving from Netlify Pages and DNS is managed by Cloudflare. I have set up this by adding CNAME/A in Cloudflare which points to abc.netlify.app/IP. Now I want my users to ...
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1answer
118 views

Virtualmin + Nginx + SSL setup error with cloudflare 521

OS: Ubuntu 20.04 Installed Virtualmin + Nginx + PHP-FPM Everything set up fine, however, when I installed SSL Certificate 3 month’s trial (Fully Valid Cert) not from Letsencrypt ( Reached limit ) ...
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363 views

TLS error using Cockpit with Cloudflare/Portzilla

I've recently installed cockpit (and quite like it) and decided to use Portzilla on my cloudflare account to set up a subdomain where I can access my cockpit server remotely. I've been getting ...
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54 views

Design for Providing custom CNAMEs using Cloudflare and Lets Encrypt

Currently we have a cloud based SaaS application, that runs behind a domain on Cloudflare. Let's say example.com. The main panel and application is located at cloud.example.com. When a customer signs ...
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178 views

Failed authorization procedure on DigitalOcean & CloudFlare SSL generate

I have hundreds of domains & sub-domains on DigitalOcean with nginx and every domain is using letsencrypt for generating SSL encryption. Recently, I added Cloudflare for CDN and need to create a ...
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34 views

What is the best way to handle DNS and failover management for a subdomain website when I don't have control of the domain?

Updating DNS for this subdomain would take hours or days, but we'd like to be able to set up a reliable auto-failover mechanism that I think would require faster DNS changes. What is best practice for ...
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2answers
328 views

Is it possible to make reverse dns lookup on cloudflare

Somehow Cloudflare is hiding the real ip of my server. Is there a possibility to check other domains on my ip by reverse DNS? in short I make dig some-server-name.com I got in reply some A records......
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98 views

Reverse DNS does not contain the hostname and RDNS_NONE from spam assasing

So i am trying to setup the reverse dns for my server and i got it mapping correctly to my mail domain and i did a test on mail-test but reverse dns failed with: Spam Assasin RDNS_NONE, but on mail ...
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214 views

apache mod_evasive and cloudlare

Will mod_evasive work if my website uses cloudflare ? I fear that mod_evasive will stop all cloudflare Ips as false positive and them defend Apache against Cloudflare. My question may be: how ...
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28 views

Cloudflare 522, 525 connection timed out

My website keeps giving 522 connection timeout error. we contacted the cloudflare support team and found that there are some packet loss. because of which we are getting this error. Can you please ...
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1answer
220 views

https not working for aws load balancer, also cloudflare cname for @ is not working but anything else works

I have a ec2 instance with a loadbalancer. The loadbalancer has an issued ssl certificate, it says it's active. I will post screenshots of all my settings. The site works on http just fine. Just not ...
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1answer
423 views

Hide site's real IP address like Cloudflare does?

I have multiple sites hosted on an Azure VM. So all the domains are pointing to a single IP of that vm. When someone reverse whois my IP address, he/she could be able to find all the related domains ...
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3answers
421 views

How to use Cloudflare's CDN while we can not change nameservers on WIX

We have a website on WIX (www.example.com). The domain name and name servers are all on WIX. Using the same domain name we have another website (buy.example.com) which is NOT on WIX. The "A ...
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96 views

Apache2 / Cloudflare Error 521

My apache2 server encountered a error: "502 Bad Gateway". I started using ExpressJS and this happened. Im doing this because I need to use pug and other backend utilities. Here is my apache2 ...
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22 views

Apache Refusing to resolve to any Domain Names, only through an IP

I'm extremely new to this stuff, I've learned a lot but I have no clue what is happening here. I recently went to do maintenance on a website I'm hosting here. When I modified a VHost directive in ...
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83 views

Apache2 Reverse Proxy behind Cloudflare site

I have an Apache2 reverse proxy on my network. This reverse proxy redirects the requests coming from the hostname example.com. When wanting to add a new domain name, I just create a new vHost and ...
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225 views

How to check AWS cloudfront traffic limit? 504 server error

I have a website that handles ticket selling which opens once a year. Many peoples come to the website at a specific date and time. However, some users received 504 Status Code (Gateway Timeout) from ...
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121 views

Cert-Manager Error Fetching certificate via cloudflare dns01 challenge

I'm trying to create a wildcard cert via cert-manager for my domain. --- apiVersion: cert-manager.io/v1 kind: Certificate metadata: name: ipa spec: # Secret names are always required. secretName:...
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30 views

Use Cloudflare Worker to avoid preflight requests

I have a statically hosted SPA at app.example.com, communicating with a Rest API at api.example.com. I use Cloudflare as reverse proxy in front of both. I would like to avoid preflight requests to be ...
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93 views

Is it possible to conditionally set RemoteIPHeader?

I am using Cloudflare to manage DNS in a staging setup and often switch between "DNS only" and "Proxied" states. I have Apache listening on port 443 which terminates the ssl and ...
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1answer
201 views

How to get Cloudflare SSL to work with IIS website on Azure virtual machine

I have an Azure virtual machine running IIS. The DNS goes through Cloudflare and I have turned SSL on there. However, when I visit https://www.reainvite.com.au I get "This site can’t be ...
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1answer
269 views

Is it possible to have the root domain on one web hosting and a sub-domain on another?

I have a shared web-hosting with CompanyA and another shared hosting with CompanyB. I own one domain called example.com. I want to host example.com on CompanyA and sub.example.com on CompanyB. Is this ...
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22 views

CDN SSL Authentication reliablity

I was having SSL on my main domain. which is let say , "example.com" & it only showed lock/HTTPS icon on "example.com" not any subdomain eg. abc.example.com , xyz.example.com ...
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1answer
155 views

Nginx proxy_pass multiple redirects issues

I'm having issues with nginx and 302 redirects to files that are behind multiple redirects. so I'm trying to proxy this request and get 502 bad gateway. location /85319 { proxy_pass https://traffic....
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1answer
247 views

Delegate main domain and part of subdomains to different nameserver

Let's assume I have: Registered myapp.tld domain with ns.some.tld nameserver set DigitalOcean droplets: foo.myapp.tld bar.myapp.tld Cloudflare zone for: myapp.tld es.myapp.tld de.myapp.tld other ...

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