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nginx error


6 reasons for Nginx upstream error – How to fix it?

Nginx is the all-time favorite webserver and reverse proxy server for high traffic websites.

It stays strong under high traffic, and help achieve high uptime.

But like any other server, Nginx too is susceptible to configuration and connection issues that cause nginx upstream errors.

Result is website downtimes and in turn, negative impact on SEO.

502 bad gateway” is one such common nginx upstream error.

At Bobcares, engineers at our 24/7 monitoring service monitor the servers and quickly resolve such nginx upstream errors.

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“502 connection failed” and other 502 errors explained – and resolved

Web servers show 502 errors when they are unable to display a requested page – due to network error, security restrictions, and so on.

502 Connection failed is one such error reported by Fiddler, a web app debugging tool.

It means that Fiddler’s request for a web page was blocked (or request delayed) by the site’s web server or firewall or load balancer, causing the request to timeout.

There could be other reasons also for this issue.

Here at Bobcares, we help website owners resolve server errors as part of our Outsourced Technical Support services.

Today we’ll go through the top causes for 502 class errors, and how to fix them.

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How to renew Lets-encrypt Certificate in Nginx

Lets-encrypt SSL is a great way to secure websites as they are free of cost.

But, it comes with the overhead of frequent renewals, that is, every 3 months.

And even a small mistake in the timely renewal of Lets-encrypt certificate can cause serious downtime for the website.

At Bobcares, we help Web Hosting providers to automate this Lets-encrypt SSL renewal as part of our Outsourced Tech Support services.

Today, we’ll discuss the steps to renew Lets-encrypt SSL on Nginx server.

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Fixing Nginx Docker error “16440 upstream prematurely closed connection”

Here at Bobcares, we help Website owners, SaaS providers and Hosting companies run highly reliable web services.

One way we achieve that is by having server experts monitor production servers 24/7 and quickly resolving any issue that can affect uptime.

Recently, engineers at our 24×7 monitoring service noticed that a site hosted by our customer in a Docker server was offline. (more…)