Приветствую Вас товарищи!
Ситуация следующая: есть сервер, на котором расположена Пользовательская страница (Интернет провайдер)! Соответственно на обработку соединений поставили nginx!
Все работает отлично, и нареканий пока нету (тьфу-тьфу)!
Но вот случайно зашел в файл логов и увидел вот такую картину (причем таких записей валом):

192.168.61.186 - - [16/Feb/2011:10:52:39 +0200] "NԀ;9▒Y<▒G▒\x1D▒Ą6GK^▒▒nQ▒\x5C▒z▒f▒3▒N\x08▒▒@z\x17F▒%▒" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:52:39 +0200] "▒▒9e3▒▒▒*ԛ▒▒▒\x0F⿸T▒▒/▒▒▒lW▒\x04▒#▒&▒/<▒s▒*▒i" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:52:39 +0200] "▒\x1A▒\x17y▒D\x1E" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:52:42 +0200] "v▒I▒$\x1Cs*q\x07$7▒▒2▒z▒.▒\x01%TW" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:52:44 +0200] "E@▒\x01Ac▒▒/▒▒N▒▒[^ C\x05▒m▒p>▒ѭ▒ݒ" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:52:50 +0200] "L!▒n▒▒ga" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:03 +0200] "▒F▒+▒Ӿ▒\x1C7" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:03 +0200] "s▒▒▒3\x1C▒7=l▒▒S▒B▒r▒▒▒W▒X▒\x0B:▒▒▒\x14▒\x01▒Z▒6▒▒(v\x04▒▒\x19\x03▒▒l,h▒\x07fJI\x0E\x00▒\x18▒m`k\x1C\x127/▒▒f▒" 400 1
72 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:03 +0200] "▒▒>▒▒}▒▒▒▒(-▒▒▒▒M\x1C▒~b,▒▒▒O▒lO▒▒\x10̀▒" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:05 +0200] "LQĿ▒▒l▒7 ▒▒FT؞Ň@▒▒;▒▒6κ242▒" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:07 +0200] "▒#9▒%/▒%,V▒<▒0[˧▒▒▒!~VD\x05" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:13 +0200] "▒▒�▒▒nCTL▒5▒▒\x11▒\x11g\x11▒;E▒'\x17Z\x16▒\x1AU0▒\x15!J▒" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:23 +0200] "▒l▒ ERI▒1\x5C&▒h\x15@▒Ü▒▒8▒▒Ӳ▒/\x1C@\x0E\x04▒eT\x02▒▒!\x0FD▒ߥ-q▒▒6▒N}▒▒" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:26 +0200] "e▒I▒▒c▒D▒\x07PAp▒<SP▒S;-▒▒km▒▒▒&▒▒_▒N▒mP▒pH8▒▒" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:26 +0200] "▒N▒▒▒6▒\x0C\x1F▒Z▒▒▒▒\x1B▒▒\x05Ɔ.%(▒▒▒7▒힞K!▒7\x16▒Y▒ҭ▒5▒*|" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:26 +0200] "\x12\x10▒▒M▒▒▒▒▒▒Ґ\x09\x1DJh\x0E▒y\x1A\x09▒l▒▒22\x02f▒▒▒▒ްPe߳[▒0▒8▒x\x15Q\x11h▒▒▒" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:28 +0200] "▒c▒ڢ▒\x0B▒▒]▒4%X\x0E▒▒▒P5▒S▒▒\x09▒▒▒T▒}p▒e\x1AÉ\x07l" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:30 +0200] "▒j▒R`a▒▒▒,7▒\x01▒▒y▒▒▒1▒▒RL▒4▒+i▒▒$i▒_ށx▒вy]▒m/▒c\x08e▒}E>ً▒M▒\x176'~\x10}<X" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:37 +0200] "ru▒▒▒=\x14▒n\x06)▒▒▒▒▒\x1D71▒\x0C▒_I▒▒j:.▒▒▒▒▒=p4P`+▒▒\x00▒Md▒▒\x0E▒;J4▒\x0B▒d\x13fڙ▒V" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:46 +0200] "▒▒w٩▒TLl\x13▒\x18%▒▒\x07▒▒F▒\x17▒M▒I$.Q" 400 172 "-" "-"
192.168.61.186 - - [16/Feb/2011:10:53:49 +0200] "▒▒▒▒\x03▒▒3▒" 400 172 "-" "-"



Подскажите пожалуйста, что это за страшные запросы, и как с таким бороться?
Спасибо!