We are getting following strange errors on error_log. Anybody knows fix for this ?
Httpd process getting hundreds of connections in few min. We found that errors related to port 80 only. HTTPS Port working fine and we can access sites in preview mode.

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[Tue Feb 1 04:11:16 2005] [error] [client 61.81.94.73] Invalid method in request 5kNvPDp
[Tue Feb 1 04:11:16 2005] [error] [client 61.81.94.73] Invalid method in request gTXaiyL3SISwokb6kb1EBARxu0vMwCGnMAQhSD2T2VxXAPaFZw HuONlBIzJfBzHQ6m8FSAPwtmiU0YlOj
[Tue Feb 1 04:11:16 2005] [error] [client 64.86.179.232] Invalid method in request OIoHKBZhyqAQ0zbiooyjjB5XDGXY0iRKJdvYnelpG3S3gJBsD1 07KVQ6AlWxhXumVWwpCs7xWsLgSSHxxXgwzh7AD5J7dwoVMxqq etWatu6zTWz4StgoQuIUZEPwkIWnLlMpuHuqmRZMx
[Tue Feb 1 04:11:17 2005] [error] [client 81.213.93.218] Invalid method in request 697Qrmvty7XSJ3c
[Tue Feb 1 04:11:17 2005] [error] [client 82.147.179.157] Invalid method in request lTkDLRZg1YuyALYjscImZ
[Tue Feb 1 04:11:17 2005] [error] [client 82.147.179.157] Invalid method in request c2jjj7GbrOfsFVxJFHkPIjWASir9gRm0jT2esABay1nx3nCrfF YWo0V5NhJKdZX6ALGzI4xE6hl8indbMfA4i1BqS3qf8olVKQWf SJPBw
[Tue Feb 1 04:11:17 2005] [error] [client 64.86.179.232] Invalid method in request 9ODLOHsSDSvnwQXtMN3zT9Rc5UNOU4BEHDvNSBzuUe4v85Yavp PvdtaxX09pJrYU7utAOXYBwv9
[Tue Feb 1 04:11:17 2005] [error] [client 82.37.25.85] Invalid method in request yrLA4o3j5YaU7pSa
[Tue Feb 1 04:11:17 2005] [error] [client 82.37.25.85] Invalid method in request 8G4uRJ0lmcp
[Tue Feb 1 04:11:18 2005] [error] [client 217.131.202.74] Invalid method in request HsKpnrvhzL4MEkD5f53
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Any inputs appreciated..

Thank you