Recently Logwatch detects much more probes on my server than usual. Here an example of my yesterday logwatch report:
--------------------- httpd Begin ------------------------
A total of **10415** sites probed the server
95.138.82.51
95.138.88.62
95.138.95.75
105.100.141.37
105.100.155.97
105.100.157.184
...
Requests with error response codes
400 Bad Request
null: **159539** Time(s)
...
--------------------- httpd End ------------------------
Is there a way to reduce this spam or detect nature of those annonying bots?