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Basic Pleskian
- Server operating system version
- Ubuntu 22.04.1 LTS
- Plesk version and microupdate number
- Plesk Obsidian Version 18.0.48
I suffered for hours on this problem so I decided to post it here for future searchers. Basically I moved my website to my new server hosted by Ionos. We run Woocommerce on Wordpress and use a Shipstation plugin to update orders. We I transferred over the website to the new server, the connection between Shipstation and Woo would not work and constantly gave a 502 Bad Gateway. I was told by Shipstation that they use AWS so this fix could be valid for many other server to server applications. I checked everything like twice. Firewalls, security plugins, IP banning, etc.
Turns out the problem was the new Plesk installation defaults to a "Modern" TLS level which for NGINX is 1.3. Well, AWS and Shipstation require 1.2. When I set it to the recommended "Intermediate", the problem resolved itself instantly.
Go to Plesk -> Tools & Settings -> Security -> TLS versions and ciphers by Mozilla
So it is very odd that when searching for 502 bad gateway and woocommerce that there is nothing that discusses TLS version. This needs to be on a Plesk trouble shooting page.
Turns out the problem was the new Plesk installation defaults to a "Modern" TLS level which for NGINX is 1.3. Well, AWS and Shipstation require 1.2. When I set it to the recommended "Intermediate", the problem resolved itself instantly.
Go to Plesk -> Tools & Settings -> Security -> TLS versions and ciphers by Mozilla
So it is very odd that when searching for 502 bad gateway and woocommerce that there is nothing that discusses TLS version. This needs to be on a Plesk trouble shooting page.
