Compare them with the list of Supported Ciphers and Protocols. If you want to restrict it further using a custom policy, you must allow the ciphers that CloudFront supports. If the full chain of certificates, including the intermediate certificate, is not present, CloudFront drops the TCP connection. You have the option to modify these ports.
SSL/TLS Negotiation Failure Between CloudFront and a Custom Origin Server
If your origin is rejecting traffic on these ports for any reason, or if your backend server isn't responding on the ports, CloudFront will fail to connect. To troubleshoot these issues, check any firewalls running in your infrastructure and validate that they are not blocking the supported IP ranges.
Additionally, verify whether your web server is running on the origin. When CloudFront receives a request for an object that is expired or is not stored in its cache, it makes a request to the origin to get the updated object. To make a successful request to the origin, CloudFront performs a DNS resolution on the origin domain name.
However, when the DNS service that hosts your domain is experiencing issues, CloudFront cannot resolve the domain name to get the IP address, resulting in a error. To further troubleshoot this issue, ensure that the authoritative name servers of your origin's root domain or zone apex such as example.
Your authoritative name servers then receive the request and return the IP address that is associated with the domain, and are the same as the DNS servers that you used to set up your CloudFront distribution. Use the following commands to find the name servers for your apex origin:. When you have the names of your name servers, use the following commands to query the domain name of your origin against them to make sure that each responds with an answer:.
HTTP Status and Error Codes for JSON
By using our site, you consent to cookies. A bad gateway error can be a difficult problem to fix.
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It ranks alongside error, error and more generic server error as a source of frustration to website owner and user alike. For web developers of sites throwing up this problem or a user trying to access a site showing this problem, read on to find out what the actual problem is and how to repair a website with a bad gateway.
This code is one of those HTTP Status Codes that alert a web server administrator that something is wrong with the website. At its most basic level, a bad gateway error signifies an issue with server communication. It relates to the communication between a gateway or proxy server that has accepted an invalid response from an upstream or origin server. A error usually means something has been misconfigured in your website's set-up along the way. Server overload - a server can crash if it has exhausted its memory, due to a multitude of visitors on site or a DDOS attack.
- Origin Is Not Responding with Supported Ciphers/Protocols.
- HTTP 502 Status Code (Bad Gateway).
- HTTP Status and Error Codes for JSON | Cloud Storage | Google Cloud.
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Firewall blocks a request - a firewall may block communications between an edge server and upstream server. Some DDoS protection systems can over-react and block requests from a content delivery system.
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