Digitalocean server throws 521
Daisho Komiyama edited this page Oct 31, 2021
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2 revisions
Droplet: ubuntu-s-1vcpu-1gb-nyc3-01
When I added a new ssh key to ./ssh/authorized_keys for my macbook pro late 2013 to enable ssh login, instead of password login (Oct 31, 2021).
The page for https://daishodesign.com started showing the error below.
Error 521
The web server is not returning a connection. As a result, the web page is not displaying.
I restarted PM2 by following this article, but it didn't fix the problem.
So I even tried to restart the droplet from Digitalocean website, but it didn't work.
Upon investigation, I found that Nginx was dead. systemctl nginx status shows
Loaded: loaded (/lib/systemd/system/nginx.service; disabled; vendor preset: enabled)
Active: inactive (dead)
Docs: man:nginx(8)
Nginx dead. How come?
I started Nginx with systemctl start nginx. I was required a password so I entered it.
Problem fixed.