# Nginx - enabling SPDY with freeware certificate

DevFeed: [Nginx - enabling SPDY with freeware certificate](<https://devfeed.tech/articles/nginx-enabling-spdy-with-freeware-certificate-27606.md>)

Original publisher: [Read original article](<https://gagor.pro/2014/01/nginx-enabling-spdy-with-freeware-certificate/>)

Author: Tom

Published: 2014-01-24T00:00:00Z

Content type: tutorial

Language: en

Sources: [Tomasz Gągor](<https://devfeed.tech/sources/tomasz-gagor.md>)

Topics: [nginx](<https://devfeed.tech/topics/nginx.md>), [SSL](<https://devfeed.tech/topics/ssl.md>), [certificates](<https://devfeed.tech/topics/certificates.md>), [Security](<https://devfeed.tech/topics/security.md>), [Protocol (disambiguation)](<https://devfeed.tech/topics/protocol.md>)

Tags: [certificates](<https://devfeed.tech/tags/certificates.md>), [linux](<https://devfeed.tech/tags/linux.md>), [nginx](<https://devfeed.tech/tags/nginx.md>), [performance](<https://devfeed.tech/tags/performance.md>), [protocol](<https://devfeed.tech/tags/protocol.md>), [security](<https://devfeed.tech/tags/security.md>), [ssl](<https://devfeed.tech/tags/ssl.md>), [website](<https://devfeed.tech/tags/website.md>)

## AI overview

This tutorial explains how to enable the SPDY protocol on an nginx website using a freeware certificate trusted by common browsers. It covers obtaining certificate authority certificates, creating a unified certificate, configuring nginx, and advertising SPDY with an Alternate-Protocol header.

## Source excerpt

I was thinking about allowing access to my website using SPDY protocol for better performance and security (and for fun of course 😃 ). But SPDY have one disadvantage - you need SSL certificate signed by known authority that will verfiy in common browsers. So you can't use self signed certificates because everyone will see a warning entering your site. Certs are quite expensive so I started searching for free one and to my surprise I found such!