# How to create secure certificates using Let's Encrypt & How to use them

**URL:** <https://discourse.nodered.org/t/how-to-create-secure-certificates-using-lets-encrypt-how-to-use-them/4309>\
**Category:** General\
**Tags:** security\
**Created:** [26 October 2018 08:30 UTC](https://discourse.nodered.org/t/how-to-create-secure-certificates-using-lets-encrypt-how-to-use-them/4309 "2018-10-26T08:30:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![TotallyInformation](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/totallyinformation/32/31_2.png) [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Post date:** [26 October 2018 08:30 UTC](https://discourse.nodered.org/t/how-to-create-secure-certificates-using-lets-encrypt-how-to-use-them/4309/1 "2018-10-26T08:30:57Z")

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Hi all, if you've followed any of the security threads recently, you may have seen that I was trying to get a new blog post finised - well it isn't really finished but as there are many questions at the moment, I thought I'd better get it out as it is as it may be some time before I can completely finish it.

It explains how you can use Let's Encrypt for valid TLS (HTTPS) certificates that don't generate browser warnings even for an internal-only network. You don't need to expose your network to the Internet at all - as long as you have the right DNS provider.

It then also tries to explain some places you can use the certificate and gives some idea on how to configure services - it is this part that isn't finished. I'd be more than happy if anyone is able to fill in the blanks!

Specifically, it shows how to use the certificate in Node-RED, Grafana and a couple of other things.

> **[How to create secure certificates](https://it.knightnet.org.uk/kb/nr-qa/https-valid-certificates/)**
>
> Generate certificates for Node-RED that are trusted by all modern browsers. This will let you access Node-RED (and other services) over an encrypted HTTPS link.