Acabei encontrando a resposta para essa pergunta ao visualizar várias outras questões de falha de servidor que eram semelhantes por natureza. Depois, pesquisando algo, achei isso:
Estou bastante familiarizado com a ideia de que bots estão testando meu servidor em busca de vulnerabilidades, mas hoje, quando verifiquei meus registros de acesso, notei um monte de buscas no google aparecendo nos registros. Qual é exatamente o objetivo disso?
91.188.124.225 - - [22/Dec/2013:22:15:03 +0000] "GET http://www.google.pl/search?q=onet.pl HTTP/1.1" 301 325 "-" "-"
91.188.124.225 - - [22/Dec/2013:22:46:02 +0000] "GET http://www.google.pl/search?q=wp.pl HTTP/1.1" 301 323 "-" "-"
91.188.124.225 - - [22/Dec/2013:23:16:59 +0000] "GET http://www.google.pl/search?q=wczasy HTTP/1.1" 301 324 "-" "-"
91.188.124.225 - - [22/Dec/2013:23:48:01 +0000] "GET http://www.google.pl/search?q=polska+najlepsza HTTP/1.1" 301 334 "-" "-"
91.188.124.225 - - [23/Dec/2013:00:19:00 +0000] "GET http://www.google.pl/search?q=polska+najlepsza HTTP/1.1" 301 334 "-" "-"
91.188.124.225 - - [23/Dec/2013:00:50:01 +0000] "GET http://www.google.pl/search?q=wczasy HTTP/1.1" 301 324 "-" "-"
91.188.124.225 - - [23/Dec/2013:01:21:01 +0000] "GET http://www.google.pl/search?q=google HTTP/1.1" 301 324 "-" "-"
91.188.124.225 - - [23/Dec/2013:01:52:01 +0000] "GET http://www.google.pl/search?q=google HTTP/1.1" 301 324 "-" "-"
91.188.124.225 - - [23/Dec/2013:02:23:00 +0000] "GET http://www.google.pl/search?q=onet.pl HTTP/1.1" 301 325 "-" "-"
91.188.124.225 - - [23/Dec/2013:02:54:00 +0000] "GET http://www.google.pl/search?q=wakacje HTTP/1.1" 301 325 "-" "-"
91.188.124.225 - - [23/Dec/2013:03:25:01 +0000] "GET http://www.google.pl/search?q=ostro%C5%82%C4%99ka HTTP/1.1" 301 345 "-" "-"
91.188.124.225 - - [23/Dec/2013:03:55:58 +0000] "GET http://www.google.pl/search?q=polska+najlepsza HTTP/1.1" 301 334 "-" "-"
91.188.124.225 - - [23/Dec/2013:04:26:54 +0000] "GET http://www.google.pl/search?q=wczasy HTTP/1.1" 301 324 "-" "-"
91.188.124.225 - - [23/Dec/2013:04:58:01 +0000] "GET http://www.google.pl/search?q=wczasy HTTP/1.1" 301 324 "-" "-"
91.188.124.225 - - [23/Dec/2013:05:29:01 +0000] "GET http://www.google.pl/search?q=google HTTP/1.1" 301 324 "-" "-"
91.188.124.225 - - [23/Dec/2013:06:00:00 +0000] "GET http://www.google.pl/search?q=onet.pl HTTP/1.1" 301 325 "-" "-"
91.188.124.225 - - [23/Dec/2013:06:31:01 +0000] "GET http://www.google.pl/search?q=wczasy HTTP/1.1" 301 324 "-" "-"
91.188.124.225 - - [23/Dec/2013:07:01:59 +0000] "GET http://www.google.pl/search?q=wp.pl HTTP/1.1" 301 323 "-" "-"
91.188.124.225 - - [23/Dec/2013:07:33:01 +0000] "GET http://www.google.pl/search?q=wakacje HTTP/1.1" 301 325 "-" "-"
91.188.124.225 - - [23/Dec/2013:08:04:01 +0000] "GET http://www.google.pl/search?q=onet.pl HTTP/1.1" 301 325 "-" "-"
91.188.124.225 - - [23/Dec/2013:08:35:00 +0000] "GET http://www.google.pl/search?q=ostro%C5%82%C4%99ka HTTP/1.1" 301 345 "-" "-"
91.188.124.225 - - [23/Dec/2013:09:05:58 +0000] "GET http://www.google.pl/search?q=praca HTTP/1.1" 301 323 "-" "-"
91.188.124.225 - - [23/Dec/2013:09:36:59 +0000] "GET http://www.google.pl/search?q=google HTTP/1.1" 301 324 "-" "-"
91.188.124.225 - - [23/Dec/2013:10:08:01 +0000] "GET http://www.google.pl/search?q=wp.pl HTTP/1.1" 301 323 "-" "-"
91.188.124.225 - - [23/Dec/2013:10:38:59 +0000] "GET http://www.google.pl/search?q=google HTTP/1.1" 301 324 "-" "-"
91.188.124.225 - - [23/Dec/2013:11:10:01 +0000] "GET http://www.google.pl/search?q=google HTTP/1.1" 301 324 "-" "-"
91.188.124.225 - - [23/Dec/2013:11:41:02 +0000] "GET http://www.google.pl/search?q=polska+najlepsza HTTP/1.1" 301 334 "-" "-"
91.188.124.225 - - [23/Dec/2013:12:12:01 +0000] "GET http://www.google.pl/search?q=ostro%C5%82%C4%99ka HTTP/1.1" 301 345 "-" "-"
91.188.124.225 - - [23/Dec/2013:12:43:00 +0000] "GET http://www.google.pl/search?q=wakacje HTTP/1.1" 301 325 "-" "-"
91.188.124.225 - - [23/Dec/2013:13:13:59 +0000] "GET http://www.google.pl/search?q=polska+najlepsza HTTP/1.1" 301 334 "-" "-"
91.188.124.225 - - [23/Dec/2013:13:44:59 +0000] "GET http://www.google.pl/search?q=praca HTTP/1.1" 301 323 "-" "-"
91.188.124.225 - - [23/Dec/2013:14:15:59 +0000] "GET http://www.google.pl/search?q=praca HTTP/1.1" 301 323 "-" "-"
91.188.124.225 - - [23/Dec/2013:14:47:01 +0000] "GET http://www.google.pl/search?q=onet.pl HTTP/1.1" 301 325 "-" "-"
91.188.124.225 - - [23/Dec/2013:15:18:00 +0000] "GET http://www.google.pl/search?q=google HTTP/1.1" 301 324 "-" "-"
91.188.124.225 - - [23/Dec/2013:15:48:59 +0000] "GET http://www.google.pl/search?q=wczasy HTTP/1.1" 301 324 "-" "-"
91.188.124.225 - - [23/Dec/2013:16:20:00 +0000] "GET http://www.google.pl/search?q=wp.pl HTTP/1.1" 301 323 "-" "-"
91.188.124.225 - - [23/Dec/2013:16:50:56 +0000] "GET http://www.google.pl/search?q=wakacje HTTP/1.1" 301 325 "-" "-"
91.188.124.225 - - [23/Dec/2013:17:22:00 +0000] "GET http://www.google.pl/search?q=wczasy HTTP/1.1" 301 324 "-" "-"
91.188.124.225 - - [23/Dec/2013:17:53:00 +0000] "GET http://www.google.pl/search?q=ostro%C5%82%C4%99ka HTTP/1.1" 301 345 "-" "-"
91.188.124.225 - - [23/Dec/2013:18:24:00 +0000] "GET http://www.google.pl/search?q=praca HTTP/1.1" 301 323 "-" "-"
Acabei encontrando a resposta para essa pergunta ao visualizar várias outras questões de falha de servidor que eram semelhantes por natureza. Depois, pesquisando algo, achei isso:
Isso não é google. O que quer que esteja acessando seu site é solicitar a página chamada http://www.google.pl/search?q=some-query
Execute um whois no ip solicitante e você verá isto:
inetnum: 91.188.124.0 - 91.188.125.255
netname: KrynskiNET
descr: Hosting Company
descr: Krynski NET MichaÅ KryÅski
descr: ul. SÅawinkowska 96
descr: 20-810 Lublin
Tags security apache-2.2