The Saga of glitchy audio/waterfall and a Chinese Bot
For the past day or two, I've been experiencing an issue with glitchy audio & waterfall on some of my KiwiSDRs (there are 7 hosted here). It's been intermittent, and took a while to figure out what's been happening... but I think I did:
I noticed the problem would only start when a certain bot from China would appear in IQ mode, often parked on 5958 kHz but sometimes elsewhere. And this bot would often be on several KiwiSDRs at the same time. Most recently from 220.127.116.11, but also from 18.104.22.168 and maybe other addresses as well, which makes it difficult to completely keep it away. It's geolocated to Bejing, no idea how accurate that is.
Once I put it on the network blacklist and kicked it, the glitching would stop, not immediately but after a few minutes. I reproduced this on several of the KiwiSDRs here, so I think the correlation between the bot & glitches is not coincidental.
I have other users using IQ mode without causing the problem, so I suspect it could well be something the bot is doing, either malevolent or just shoddy programming.
I wanted to let others know about this, in case they observe the problems.
This brings up a question - any chance we could get a way to geoblock entire countries on the KiwiSDR network admin page?