[Spectre]

Just saw this message in my log for the first time:

Invalid client connecting from [IP]

******d it to no avail...
Any idea what this relates to?
Bot, sniffer, non-samp user?

[Calgon]

I can only speculate, but it seems like it's a modified version of the SA-MP client or modified software to try connect to a server the way SA-MP does, perhaps even software created to exploit the DoS bug fixed in 0.3c R3/R4/R5.