if ($args ~* "\\\x") { return 403; } Дает в логах 2010/02/24 15:51:39 21855#0: *1 "\\x" does not match "r=%5Cxd0%5Cxb7%5Cxd0%5Cxb2%5Cxd0%5Cxb5%5Cxd1%5Cx80&That=std", if ($args ~* "\\x") { return 403; } Дает в логах 2010/02/24 15:54:54 22063#0: *1 "\x" does not match "r=\xd0\xb7\xd0\xb2\xd0\xb5\xd1\x80& Posted at Nginx Forum: http://forum.nginx.org/read.php?21,56747,56779#msg-56779