<div>I typically see entries in my error.log files of hack attempts where the host entry is the IP address of my server, but I also see some entries with host values that are domain names I don't recognise.</div><div><br>
</div><div>Example 1:<br>
<div><br></div><div><div>012/04/01 06:12:49 [error] 644#0: *882 "/var/www/nginx-default/ab1e27867d53d8f4942095a891183ce0cacd3dbf/0d4fc9bfe7c5f26b02522d088dd98da95a9ed8d7/074977cbb342d6ffa7743ae477a5c0054fef5512/index.html" is not found (2: No such file or directory), client: 150.70.75.37, server: localhost, request: "GET /ab1e27867d53d8f4942095a891183ce0cacd3dbf/0d4fc9bfe7c5f26b02522d088dd98da95a9ed8d7/074977cbb342d6ffa7743ae477a5c0054fef5512/ HTTP/1.0", host: "<a href="http://deepspacer.com">deepspacer.com</a>"</div>
</div><div><br></div></div><div>Example 2:</div><div><br></div><div><div>2012/02/03 01:38:41 [error] 592#0: *14019 open() "/var/www/nginx-default/home.php" failed (2: No such file or directory), client: 216.104.15.130, server: localhost, request: "GET /home.php?SES=517a4bfc0137889f05d67314df2715a1&from_diary=1&cpl=1&from=102_4 HTTP/1.0", host: "<a href="http://www.au.mytelecomsurvey.com">www.au.mytelecomsurvey.com</a>"</div>
<div><br></div><div>Example 3:</div><div><br></div><div>2012/02/03 11:57:56 [error] 592#0: *18075 open() "/var/www/nginx-default/sites/default/files/js/js_b3ffc00633d66887fcb4ecdfc2d1c13a.jsmin.js" failed (2: No such file or directory), client: 150.70.64.197, server: localhost, request: "GET /sites/default/files/js/js_b3ffc00633d66887fcb4ecdfc2d1c13a.jsmin.js HTTP/1.0", host: "<a href="http://www.formalites-juridiques.net">www.formalites-juridiques.net</a>"</div>
<div><br></div></div><div>I was hoping someone could explain what it means if I'm seeing these domain names as host values and if it's something I need to be concerned about.</div><div><br></div><div>Thanks</div><div>
<br></div><div><br></div>