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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.

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Adding Cloudflare SSL Results in 522 Error

Currently I'm trying to install a Cloudflare SSL certificate on my Ubuntu server that uses Nginx. I am following this guide on how to do so, but once I successfully install the certificate as per the ...
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Significantly reduced page performance using Cloudflare proxy

I have been using Cloudflare for a while, however I am having an issue where I am getting significantly increased page loading times measured both on Google PageSpeed Insights and on Google Chrome. ...
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Cloudflare not resolving adobe.com?

in my setup, a local Bind9 server forwards DNS requests to Cloudflare (1.1.1.1) with DNSSEC activated. My syslog shows many timeout entries for well known domain names (like adobe.com): Apr 28 19:39:...
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Load Wordpress Homepage from different server

I have a wordpress website, where I want to recreate only the homepage using react and Wordpress rest endpoint and host this one page in Netlify, whereas all other posts continue to sit and serve from ...
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Apache KeepAlive with Cloudflare

I use Cloudflare with WAF enabled. My Apache server that is called by Cloudflare has KeepAlive enabled. But from what I understand, KeepAlive will keep active connections for existing users, but since ...
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TLS 1.0 not supported in Cloudflare

I set the minimum TLS supported to 1.0 however when I check the site using SSLLabs I see that only TLS1.2 and TLS1.3 are only supported. This is a newly created account. We have also another account ...
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Nginx, Cloudflare, Subdomain issues

NGINX Newbie here, I'm trying to configure what I find a bit challenging task. I need the following structure: www.example.com -- Website for Company. For now, both www.example.com and example.com ...
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content type is returned as text/html while the expected is application/json

some endpoints are returning the content type as text/html while the expected is application/json causing CORS error in the client side. when requesting from my localhost or from the server's IP ...
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How to get DDOS+WAF protection on IP/server (not domain)

I've used CloudFlare and it's great. But in this specific case we control the server IP address but we don't own the domain so can't use CloudFlare unfortunately because the domain owner isn't ready ...
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Nginx redirect not working if using cloudflare

I'm using nginx to do a redirect if a user direct access image by browser. The problem is it doesn't work when you use cloudflare. nginx config location ~ "^/c/600x1200_90_webp/img-master/img/...
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177 views

How to set CORS header in cloudflare workers?

I'm using cloudflare workers to create a reverse proxy but I can't use it to embed on main domain cause it gives CORS error: Access to image at 'https://example.workers.dev/96384873_p0.png' from ...
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Nginx proxy_pass root to external landing page

For a new domain x.co I am setting up, I want the root (x.co) to show an external landing page without changing the url to that of the external landing page. This landing page has been created on ...
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Serve different SSL certificate depending upon connection

I currently have a Nextcloud installation running on a server at home behind an Nginx proxy, which in turn is routed through Cloudflare. The proxy currently presents a Cloudflare origin SSL ...
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Is there a workaround to use cloudflare origin certificate in aws cloudfront?

I have imported the Cloudflare origin server certificate in AWS Certificate Manager. On configuring that certificate in Cloudfront i get the following error: The certificate that is attached to your ...
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DANE and TSLA in Cloudflare

can anyone tell me how to set up DANE and TSLA in Cloudflare? Do we need Google Cloud DNS for TLSA records? which mail server will allow using TLSA at this point? ref link for DANE
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How to hide origin IP of SMTP server by tunneling/proxying incoming port 25 traffic to real mail server

We have most of our stuff behind Cloudflare. However, some services such as mail (ex: mail.mydomain.com MX record) cannot be pushed through cloudflare and they expose our mail server's IP which makes ...
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phpMyAdmin with cloudflare ssl certificartes

I have 3 wordpress sites, 1 moodle site and 1 owncloud site, all with same apache configuration in my vps, and all of them works fine But I'm not able to make phpMyAdmin work with cloudflare's origin ...
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CloudFront delivery is slow in particular location

In our scenario, I found that our CloudFront delivery particularly in the Japan area is very slow for a few days. which lead our site to become slow in the time of loading the media contents .our s3 ...
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How can I figure out how SSL is installed on a server using Apache?

I've acquired a Debian 11 server that is using apache to serve a site. SSL is installed on the site, working properly, and the certificate is provided by Cloudflare. I've gone through all of the ...
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Add TXT error - Total record size limit exceeded. Code: 83011

I keep getting Cloudflare API: Total record size limit exceeded but can't find anymore info about it. I’m using certbot with cloudflare plugin to automatically create the TXT content but even when I ...
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Handling DDoS HTTP Attack

I’ve experiencing DDoS attack today and I’ve configured Cloudflare rate limiter, also activated WAF. Cloudflare blocked several hundred thousands request. Unfortunately, my server still experiencing ...
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nginx reverse proxy called my api multiple times

I have webfarm with .net core 5 and nginx reverse proxy with 6 web server My problem, sometimes my apis call my stored procedures multiple times in few miliseconds with same parameters. I thought ...
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ddclient with cloudflare not updating

Have a domain registered with Namecheap, using Cloudflare DNS servers. Prior this setup I was just using Namecheaps DNS until realizing I cannot use their production APIs for Traefik. Whilst I had ...
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1 answer
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HTTPS resource record doesn't work for CNAME

My domain is registered with Cloudflare and uses their DNS infrastructure. I'm trying to set up an HTTPS DNS record to signal browsers that my sites can be directly accessed via HTTP/3 and HTTP/2, as ...
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Identifying cause of too many CLOSE_WAIT in IIS

I have a windows server running a web api that serves an android app, and today I started getting alarms saying that my server was timing out. This server is running behind Cloud Flare. When I ...
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Network Design For My Application in Oracle Cloud

I am trying to design network for my application in cloud. My choice of cloud is oracle cloud here. There will be two VMs in same subnet (one will be master and other as failover), both will be ...
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How to improve my current HA design

I am trying to create high availability application. My current design has two VMs, both have public IPs, both are running in same subnet and both VMs have same web application running in docker. ssl ...
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DNS Records: One IP for Primary Domain and One IP for Multiple Subdomain

I'm using Cloudflare (no proxy) to manage DNS Records. I have two servers with IP: 128.xxx.xxx.xxx 174.xxx.xx.x And these are the DNS Records that I have created: Type Name Content A example.com ...
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TCP handshake not completing intermittently to specific Cloudflare node

I have setup a webpage with Cloudflare that works nearly all of the time, except occasionally the TCP handshake fails with the SYN+ACK not making it to Cloudflare. On a packet capture from another ...
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164 views

Cloudflare in front of Nginx Reverse - redirect users with certain IP to special page

I'm running a nginx reverse proxy in front of webpage. In front of this nginx reverse proxy is also cloudflare reverse proxy running. Now I'm trying to redirect users with certain ip-addresses to a ...
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Router forces browser to use older, presumably cached, webfiles

We are trouble shooting website where we deploy a new version but our Computer browser still pulls the older pages. When we disconnect from the router (WiFi) and connect to a hotspot (mobile phone/...
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hotlink protection blocking valid referrers also

Having an issue with valid referrers not being considered in the nginx config. I have domaina.com calling images from domainb.com. The issue is that the domainb.com images are being hotlinked. so i ...
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I have 2 offices using 2 firewalls with the same brand/model with similar firewall policies. For 1 of the office, users have prob connecting to email

I have 2 nearby offices using 2 firewalls with the same Fortinet brand/model with similar firewall policies (same building , same ISP). For 1 of the office, users have problem connecting to email. The ...
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190 views

Use Apache remote IP, but require proxy IP to be in range

I put my locally hosted sites behind Cloudflare for an added layer of performance. To restore the original connecting IP, I use mod_remoteip, set up with all of Cloudflare's IP ranges. I also want to ...
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305 views

gRPC via CloudFlare results in HTTP/2 internal error code 2

My setup: .Net gRPC Server <-> Nginx <-> CloudFlare <-> gRPC client (C#/Python) My .Net gRPC Server configured to support insecured http2, listen at port 50052: webBuilder....
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Phpmyadmin not loading when using cloudflare argo tunnel

when I want connect to phpmyadmin using the argo tunnel, I get this error: The page doesn't load and sometimes give 404 errors.
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page favicon/title not showing through proxied cloudflare site

I recently bought a domain on namecheap for a minecraft server I have. Everything was working fine except for that I didn't have ssl on the website so it was showing as insecure. I changed the ...
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How to connect cloudflare argo tunnel to wordpress

What I want to achieve I want to use cloudflared daemon so that I can use cloudflare argo tunnel and connect the argo tunnel to my wordpress website so that I can protect the origin and see if there ...
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Duplicating IoT traffic

I have a simple IoT temp sensor (from China) and I can change the destination it routes traffic to. I want it to continue sending to their system AND to mine (redundancy, resilience etc). The sensor ...
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Application connecting to an application behind VPN

This is my first time working with networking and I might be completely wrong what needs to be done. Requirements: My Backend application written in PHP needs to communication with 3rd party ...
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Failed to connect to port 443: Connection refused cloudflare firewall

I'm trying to send a POST request to one of my websites which uses Cloudflare. but it returns Failed to connect to domain.site port 443: Connection refused I thought it might be the Cloudflare ...
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Working domain with no NS records, how is it possible?

I was checking a domain on cloudflare. webroot.bitappii.com There is no NS records for this domain on whois. Only SOA and A records. How this is possible that a working domain has no NS records. ...
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102 views

How to prevent origin IP Server behind Cloudflare/Sucuri with Shodan, Censys

When i use shodan/censys to scan my domain (behind with cloudflare/Sucuri) they can show my IP server with SSL. Example with Shodan: https://www.shodan.io/search?query=blogchiasekienthuc.com 103.99....
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POST request is returning ERR_HTTP2_INADEQUATE_TRANSPORT_SECURITY for coporate users

We have a website and an api services on two different subdomains. Both running on Cloudflare. The website that runs on www.example.com, and when the user logs in, there is an XHR POST call to api....
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IIS 10 - CloudFlare Proxy Reversing (mod_remoteip or mod_cloudflare)

I have a forum running on my website which is using phpBB, but all users on it have a CloudFlare IP. This is not ideal at all and I would like to fix it. After running a Google search and spending ...
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iptables not working with "x-forwarded-for" (behind Cloudflare)

I have a webserver (Ubuntu with Apache) running behind Cloudflare. I want to block a user using the iptables. Here I want to implement the string match extension of iptables and drop the connection if ...
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How to solve issues with Exchange's Autodiscover (xml) and any peculiar clients like Windows Communication Apps [HxTsr.exe] with complex DNS config?

For the search engine, context elements: Exchange Online Office 365 / Microsoft 365 --> Particular Outlook --> outlook.office.com Windows' Mail & Calendar App [HxTsr.exe, "microsoft....
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Blocking all ports except 80 and 443 with cloudflare

I try to block all ports except 22, 80, and 443. I added the following rules to iptables. *filter :INPUT ACCEPT [36878:18003219] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [33947:26518456] -A INPUT -m state ...
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DNS delegation with BIND and Cloudflare

probably just an ordinary question, but I've been wasting hours on this for months. If you need other logs/output/explanation/etc. just ask :) Thanks in advance! What I need The zone local.example....
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Mails not received when using Cloudflare DNS and Cpanel server [closed]

I have the following Cloudflare DNS config: The mail and ftp are hosted on the Cpanel server. The website is hosted on a separate server, on a VPS. You can see in this image that the mail A record is ...
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