Eu tenho um servidor CentOS 6 que se comportou mal nas últimas semanas. Tentei rastrear a rede, ajustar configurações e perguntei a muitas pessoas inteligentes sobre isso (veja mais nesta pergunta:Algo está fechando conexões em minhas VMs CentOS - qual a melhor forma de solucionar problemas?)
O problema não existia nos últimos 3-4 dias, então eu estava quase acreditando que alguns dos ajustes haviam feito a diferença. Mas agora aconteceu duas vezes em uma hora. Comecei a procurar nos logs. E eu tropecei nisso no /var/log/nginx/access.log:
:
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
34.78.120.99 - - [13/Aug/2021:15:18:34 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
:
... e muitos mais deles!
Isso ocorreu nas duas vezes em que vi o problema. Alguém sabe se está tudo bem - ou se não, qual é a melhor maneira de bloqueá-lo?
Obrigado!
/John
Editar
Eu relatei conforme sugerido - e bloqueei esse endereço IP no meu Nginx.
Então, hoje verifiquei novamente - e agora tenho vários pedidos semelhantes - apenas de outro IP.
104.155.101.3 - - [18/Aug/2021:13:54:36 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:02:45 +0200] "GET / HTTP/1.1" 200 26314 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:02:45 +0200] "GET / HTTP/1.1" 200 26313 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:02:46 +0200] "GET / HTTP/1.1" 200 26348 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:02:46 +0200] "GET / HTTP/1.1" 200 26325 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:02:46 +0200] "GET / HTTP/1.1" 200 26280 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:02:48 +0200] "GET / HTTP/1.1" 200 26325 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:02:49 +0200] "GET / HTTP/1.1" 200 26280 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:02:49 +0200] "GET / HTTP/1.1" 200 26299 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:06:25 +0200] "GET / HTTP/1.1" 200 26298 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:06:25 +0200] "GET / HTTP/1.1" 200 26349 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:06:27 +0200] "GET / HTTP/1.1" 200 2379 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:06:27 +0200] "GET / HTTP/1.1" 200 26279 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:06:28 +0200] "GET / HTTP/1.1" 200 26349 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:06:29 +0200] "GET / HTTP/1.1" 200 26318 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:06:30 +0200] "GET / HTTP/1.1" 200 26348 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:06:30 +0200] "GET / HTTP/1.1" 200 26319 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:06:32 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:06:32 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:06:32 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
104.155.101.3 - - [18/Aug/2021:16:06:32 +0200] "GET / HTTP/1.1" 499 0 "-" "python-requests/2.26.0" "-"
Devo me preocupar com alguns dos novos (com código 200)???