Proxy sendo atacado = pouco desempenho

hoje anoite olhei meu servidor de cache uma debian com pouco desenvolvimento

ai deparei com estas estranhas mensagens alguém pode me explicar?

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May 12 08:00:01 PROXY squid[2204]: clientReadRequest: FD 289 (192.168.50.1:1880) Invalid Request
May 12 08:00:01 PROXY squid[2204]: parseHttpRequest: Requestheader contains NULL characters
May 12 08:00:01 PROXY squid[2204]: parseHttpRequest: Unsupported method 'Ý8\2142Î½ê8^BÞR½'
May 12 08:00:01 PROXY squid[2204]: clientReadRequest: FD 326 (192.168.50.1:24652) Invalid Request
May 12 08:00:01 PROXY squid[2204]: parseHttpRequest: Unsupported method 'Ûù\230²÷$^ZR7\237¿Ü¢xxbz\221`g^Rä¸9ÉâV '
May 12 08:00:01 PROXY squid[2204]: clientReadRequest: FD 588 (192.168.50.1:24656) Invalid Request
May 12 08:00:01 PROXY squid[2204]: parseHttpRequest: Requestheader contains NULL characters
May 12 08:00:01 PROXY squid[2204]: parseHttpRequest: Unsupported method '\235(Kã.N_}^]@í,pY¶8û¶O\225Î^\Ã^[¬¸æì×>H¢!^TÇÓ^C'
May 12 08:00:01 PROXY squid[2204]: clientReadRequest: FD 590 (192.168.50.1:24657) Invalid Request
May 12 08:00:01 PROXY squid[2204]: parseHttpRequest: Requestheader contains NULL characters
May 12 08:00:01 PROXY squid[2204]: parseHttpRequest: Unsupported method 'ä ñ?ã-Ô¡rÔÍoõâÌitD(´\223\212`¹\200^Îã;»^CSÚ\÷v\ýzÿ:"¼ÝF%hª\224\220æ#,Y÷?\211\220Êó¶Ò\234{^RÕ\226¢\213^PVºá!'
May 12 08:00:01 PROXY squid[2204]: clientReadRequest: FD 590 (192.168.50.1:1884) Invalid Request
###########################################################

esse servidor está ao lado de um mk toda porta 80 solicitada vai direto para ele para a porta 5128

ai ñ intendi essas portas que dá na mensagem

tenho 2 servidores de cache debian os 2 tá configurado inguais alias esse foi formatado ontem e já tava assim tava com esssas mensagens ai formatei

e o outro servidor tá normal