Good evening. There is a site on DLE. Recently, such requests for a non-existent page began to come from different ip addresses. Nobody came across this? What kind of visitor can this be?

178.154.239.31 - - [09/Apr/2012:14:23:36 +0400] "GET /0164572744c2.htm HTTP/1.0" 404 1734 178.154.239.31 - - [09/Apr/2012:14:23:36 +0400] "GET /0164572744c2.htm HTTP/1.0" 404 1734 178.154.239.31 - - [09/Apr/2012:14:23:36 +0400] "GET /0164572744c2.htm HTTP/1.0" 404 1734 178.154.239.31 - - [09/Apr/2012:14:23:36 +0400] "GET /0164572744c2.htm HTTP/1.0" 404 1734 178.154.239.31 - - [09/Apr/2012:14:23:36 +0400] "GET /0164572744c2.html HTTP/1.0" 404 14606 178.154.239.31 - - [09/Apr/2012:14:23:36 +0400] "GET /0164572744c2.html HTTP/1.0" 404 14606 178.154.239.31 - - [09/Apr/2012:14:23:36 +0400] "GET /0164572744c2.html HTTP/1.0" 404 14606 178.154.239.31 - - [09/Apr/2012:14:23:36 +0400] "GET /0164572744c2.html HTTP/1.0" 404 14606 

    2 answers 2

    This is one of the Yandex services, most likely a search bot.

     route: 178.154.128.0/17 descr: Yandex network 

      There is an opinion that this is an attempt by DDos, albeit from a single computer, it can fail in a botnet, you know, block its IP address for every fireman.