I noticed some issues in my security plugin’s traffic analysis, so I updated the site to block access to a file that is often targeted by hackers. I also added a firewall at the droplet level.
In order to solve the MailChimp API issue referenced in my earlier post, I had to add some DNS nameservers to my resolv.conf configuration. DigitalOcean posted about this here . Their solution didn’t quite work as advertised, but by manually editing resolv.conf I was able to get MailChimp to work for a while. It will likely break again after reboot.