File mod_security2.conf of Package apache2-mod_security2

<IfModule mod_security2.c>
	# Basic configuration options
	SecRuleEngine On
	SecRequestBodyAccess On
	SecResponseBodyAccess Off

	# Handling of file uploads
	# TODO Choose a folder private to Apache.
	# SecUploadDir /opt/apache-frontend/tmp/
	SecUploadKeepFiles Off

	# Debug log
	SecDebugLog /var/log/apache2/modsec_debug.log
	SecDebugLogLevel 0

	# Serial audit log
	SecAuditEngine RelevantOnly
	SecAuditLogRelevantStatus ^5
	SecAuditLogParts ABIFHZ
	SecAuditLogType Serial
	SecAuditLog /var/log/apache2/modsec_audit.log

	# Maximum request body size we will
	# accept for buffering
	SecRequestBodyLimit 131072

	# Store up to 128 KB in memory
	SecRequestBodyInMemoryLimit 131072

	# Buffer response bodies of up to
	# 512 KB in length
	SecResponseBodyLimit 524288

	# Verify that we've correctly processed the request body.
	# As a rule of thumb, when failing to process a request body
	# you should reject the request (when deployed in blocking mode)
	# or log a high-severity alert (when deployed in detection-only mode).
	SecRule REQBODY_PROCESSOR_ERROR "!@eq 0" \
	"phase:2,t:none,log,deny,msg:'Failed to parse request body.',severity:2"

	# By default be strict with what we accept in the multipart/form-data
	# request body. If the rule below proves to be too strict for your
	# environment consider changing it to detection-only. You are encouraged
	# _not_ to remove it altogether.
	SecRule MULTIPART_STRICT_ERROR "!@eq 0" \
	"phase:2,t:none,log,deny,msg:'Multipart request body \
	failed strict validation: \
	PE %{REQBODY_PROCESSOR_ERROR}, \
	BQ %{MULTIPART_BOUNDARY_QUOTED}, \
	BW %{MULTIPART_BOUNDARY_WHITESPACE}, \
	DB %{MULTIPART_DATA_BEFORE}, \
	DA %{MULTIPART_DATA_AFTER}, \
	HF %{MULTIPART_HEADER_FOLDING}, \
	LF %{MULTIPART_LF_LINE}, \
	SM %{MULTIPART_SEMICOLON_MISSING}'"

	# Did we see anything that might be a boundary?
	SecRule MULTIPART_UNMATCHED_BOUNDARY "!@eq 0" \
	"phase:2,t:none,log,deny,msg:'Multipart parser detected a possible unmatched boundary.'"
</IfModule>