I’m using the Search API, which doesn’t require auth, and am encountering something similar. It also started for me on Friday and has persisted the past few days. I’m intermittently receiving “Connection reset by peer” errors and connection timeouts. I’m using a ruby script. The resets and timeouts are not very consistent though, so I don’t believe it’s an issue with blacklisting. The majority of my queries are still going through fine, but it’s enough that it’s slowing my searches down significantly. I’ve also noticed I’m not seeing 420 responses anymore, but my application code has not changed in weeks.
Thanks,
Nate