Is there an issue with the polling for the server status? I ask as I
went to confirm my server was still visible as I lost one of the cluster
nodes for sks.undergrid.net and rebuilt it last night (completely from
scratch via Salt but that's another story) and noticed that my server is
showing red for "Port 80" but I can easily hit it using
http://sks.undergrid.net. I had noticed I've had problems reaching
https://sks-keyservers.net/status/ itself on more than a few occasions
so could be some network issues in between somewhere.