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<IfModule mod_security.c>

    # Enable ModSecurity
    SecFilterEngine On

    # Reject requests with status 403
    SecFilterDefaultAction "deny,log,status:403"

    # Some sane defaults
    SecFilterScanPOST On
    SecFilterCheckURLEncoding On
    SecFilterCheckUnicodeEncoding Off

    # Accept almost all byte values
    SecFilterForceByteRange 1 255

    # Server masking is optional
    SecServerSignature "IsproNET 5.0.4"

    # Designate a directory for temporary files
    # storage. It is a good idea to change the
    # value below to a private directory, just as
    # an additional measure against race conditions
    SecUploadDir /tmp
    SecUploadKeepFiles Off

    # Only record the interesting stuff
    SecAuditEngine RelevantOnly
    # Uncomment below to record responses with unusual statuses
    # SecAuditLogRelevantStatus ^5
    SecAuditLog logs/modsec_audit.log

    # You normally won't need debug logging
    SecFilterDebugLevel 0
    SecFilterDebugLog logs/modsec_debug.log

    # Only accept request encodings we know how to handle
    # we exclude GET requests from this because some (automated)
    # clients supply "text/html" as Content-Type
    SecFilterSelective REQUEST_METHOD "!^(GET|HEAD)$" chain
    SecFilterSelective HTTP_Content-Type "!(^application/x-www-form-urlencoded$|^multipart/form-data;)"

    # Do not accept GET or HEAD requests with bodies
    SecFilterSelective REQUEST_METHOD "^(GET|HEAD)$" chain
    SecFilterSelective HTTP_Content-Length "!^$"

    # Require Content-Length to be provided with
    # every POST request
    SecFilterSelective REQUEST_METHOD "^POST$" chain
    SecFilterSelective HTTP_Content-Length "^$"

    # Don't accept transfer encodings we know we don't handle
    SecFilterSelective HTTP_Transfer-Encoding "!^$"

</IfModule>