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clamd.conf

clamd.conf(5)							  Clam AntiVirus						     clamd.conf(5)

NAME

       clamd.conf - Configuration file for Clam AntiVirus Daemon

DESCRIPTION

       clamd.conf configures the Clam AntiVirus daemon, clamd(8).

FILE FORMAT

       The  file  consists of comments and options with arguments. Each line which starts with a hash (#) symbol is ignored by the parser. Options
       and arguments are case sensitive and of the form Option Argument. The arguments are of the following types:

       BOOL   Boolean value (yes/no or true/false or 1/0).

       STRING String without blank characters.

       SIZE   Size in bytes. You can use 'M' or 'm' modifiers for megabytes and 'K' or 'k' for kilobytes.

       NUMBER Unsigned integer.

DIRECTIVES

       When some option is not used (commented out or not included in the configuration file at all) clamd takes a default action.

       Example
	      If this option is set clamd will not run.

       LogFile STRING
	      Enable logging to selected file.
	      Default: no

       LogFileUnlock BOOL
	      Disable a system lock that protects against running clamd with the same configuration file multiple times.
	      Default: no

       LogFileMaxSize SIZE
	      Limit the size of the log file. The logger will be automatically disabled if the file is greater than SIZE. Value of 0 disables  the
	      limit.
	      Default: 1M

       LogTime BOOL
	      Log time for each message.
	      Default: no

       LogClean BOOL
	      Log clean files.
	      Default: no

       LogSyslog BOOL
	      Use system logger (can work together with LogFile).
	      Default: no

       LogFacility STRING
	      Specify the type of syslog messages - please refer to 'man syslog' for facility names.
	      Default: LOG_LOCAL6

       LogVerbose BOOL
	      Enable verbose logging.
	      Default: no

       PidFile STRING
	      Save the process identifier of a listening daemon (main thread) to a specified file.
	      Default: no

       TemporaryDirectory STRING
	      Optional path to the global temporary directory.
	      Default: system specific (usually /tmp or /var/tmp).

       DatabaseDirectory STRING
	      Path to a directory containing database files.

       OfficialDatabaseOnly BOOL
	      Only load the official signatures published by the ClamAV project.
	      Default: no

       LocalSocket STRING
	      Path to a local (Unix) socket the daemon will listen on.
	      Default: no

       LocalSocketGroup STRING
	      Sets the group ownership on the unix socket.
	      Default: the primary group of the user running clamd

       LocalSocketMode STRING
	      Sets the permissions on the unix socket to the specified mode.
	      Default: socket is world readable and writable

       FixStaleSocket BOOL
	      Remove stale socket after unclean shutdown.
	      Default: yes

       TCPSocket NUMBER
	      TCP port number the daemon will listen on.
	      Default: no

       TCPAddr STRING
	      TCP socket address to bind to. By default clamd binds to INADDR_ANY.
	      Default: no

       MaxConnectionQueueLength NUMBER
	      Maximum length the queue of pending connections may grow to.
	      Default: 15

       MaxThreads NUMBER
	      Maximum number of threads running at the same time.
	      Default: 10

       ReadTimeout NUMBER
	      Waiting for data from a client socket will timeout after this time (seconds).
	      Default: 120

       CommandReadTimeout NUMBER
	      This  option  specifies the time (in seconds) after which clamd should timeout if a client doesn't provide any initial command after
	      connecting.  Note: the timeout for subsequents commands, and/or data chunks is specified by ReadTimeout.
	      Default: 5

       SendBufTimeout NUMBER
	      This option specifies how long to wait (in milliseconds) if the send buffer is full.  Keep this value low to prevent clamd hanging.
	      Default: 500

       MaxQueue NUMBER
	      Maximum number of queued items (including those being processed by MaxThreads threads).  It is recommended to  have  this  value	at
	      least twice MaxThreads if possible.
	      WARNING:	you  shouldn't	increase this too much to avoid running out of file descriptors, the following condition should hold: Max-
	      Threads*MaxRecursion + MaxQueue - MaxThreads + 6 < RLIMIT_NOFILE.  RLIMIT_NOFILE is the maximum  number  of  open  file  descriptors
	      (usually 1024), set by ulimit -n.
	      Default: 100

       IdleTimeout NUMBER
	      Waiting for a new job will timeout after this time (seconds).
	      Default: 30

       ExcludePath REGEX
	      Don't scan files and directories matching REGEX. This directive can be used multiple times.
	      Default: scan all

       MaxDirectoryRecursion NUMBER
	      Maximum depth directories are scanned at.
	      Default: 15

       FollowDirectorySymlinks BOOL
	      Follow directory symlinks.
	      Default: no

       CrossFilesystems BOOL
	      Scan files and directories on other filesystems.
	      Default: yes

       FollowFileSymlinks BOOL
	      Follow regular file symlinks.
	      Default: no

       SelfCheck NUMBER
	      Perform a database check.
	      Default: 1800

       VirusEvent COMMAND
	      Execute COMMAND when a virus is found. In the command string %v will be replaced with the virus name.
	      Default: no

       ExitOnOOM BOOL
	      Stop daemon when libclamav reports out of memory condition.
	      Default: no

       User STRING
	      Run as another user (clamd must be started by root to make this option working).
	      Default: no

       AllowSupplementaryGroups BOOL
	      Initialize supplementary group access (clamd must be started by root).
	      Default: no

       Foreground BOOL
	      Don't fork into background.
	      Default: no

       Debug BOOL
	      Enable debug messages from libclamav.

       LeaveTemporaryFiles BOOL
	      Do not remove temporary files (for debug purpose).
	      Default: no

       StreamMaxLength SIZE
	      Clamd  uses  FTP-like  protocol  to  receive data from remote clients. If you are using clamav-milter to balance load between remote
	      clamd daemons on firewall servers you may need to tune the Stream* options. This option allows you to specify the  upper	limit  for
	      data  size  that	will  be  transfered  to remote daemon when scanning a single file. It should match your MTA's limit for a maximum
	      attachment size.
	      Default: 10M

       StreamMinPort NUMBER
	      Limit data port range.
	      Default: 1024

       StreamMaxPort NUMBER
	      Limit data port range.
	      Default: 2048

       Bytecode BOOL
	      With this option enabled ClamAV will load bytecode from the database. It is highly recommended you keep this option turned on,  oth-
	      erwise you may miss detections for many new viruses.
	      Default: yes

       BytecodeSecurity STRING
	      Set  bytecode security level. Possible values: None: no security at all, meant for debugging. DO NOT USE THIS ON PRODUCTION SYSTEMS,
	      TrustSigned: trust bytecode loaded from signed .c[lv]d files and insert  runtime	safety	checks	for  bytecode  loaded  from  other
	      sources, Paranoid: don't trust any bytecode, insert runtime checks for all. The recommended setting is TrustSigned, because bytecode
	      in .cvd files already has safety checks inserted into it.
	      Default: TrustSigned

       BytecodeTimeout NUMBER
	      Set bytecode timeout in milliseconds.
	      Default: 60000

       DetectPUA BOOL
	      Detect Possibly Unwanted Applications.
	      Default: No

       ExcludePUA CATEGORY
	      Exclude a specific PUA category. This directive can be used multiple times. See http://www.clamav.net/support/pua for  the  complete
	      list of PUA categories.
	      Default: Load all categories (if DetectPUA is activated)

       IncludePUA CATEGORY
	      Only  include a specific PUA category. This directive can be used multiple times. See http://www.clamav.net/support/pua for the com-
	      plete list of PUA categories.
	      Default: Load all categories (if DetectPUA is activated)

       AlgorithmicDetection BOOL
	      In some cases (eg. complex malware, exploits in graphic files, and others), ClamAV  uses	special  algorithms  to  provide  accurate
	      detection. This option controls the algorithmic detection.
	      Default: yes

       ScanPE BOOL
	      PE  stands for Portable Executable - it's an executable file format used in all 32 and 64-bit versions of Windows operating systems.
	      This option allows ClamAV to perform a deeper analysis of executable files and it's also required for decompression of popular  exe-
	      cutable packers such as UPX.
	      Default: yes

       ScanELF BOOL
	      Executable  and  Linking	Format	is  a  standard format for UN*X executables. This option allows you to control the scanning of ELF
	      files.
	      Default: yes

       DetectBrokenExecutables BOOL
	      With this option clamd will try to detect broken executables (both PE and ELF) and mark them as Broken.Executable.
	      Default: no

       ScanOLE2 BOOL
	      This option enables scanning of OLE2 files, such as Microsoft Office documents and .msi files.
	      Default: yes

       ScanPDF BOOL
	      This option enables scanning within PDF files.
	      Default: yes

       ScanHTML BOOL
	      Enables HTML detection and normalisation.
	      Default: yes

       ScanMail BOOL
	      Enable scanning of mail files.
	      Default: yes

       ScanPartialMessages BOOL
	      Scan RFC1341 messages split over many emails. You will need to periodically clean up  $TemporaryDirectory/clamav-partial	directory.
	      WARNING: This option may open your system to a DoS attack. Never use it on loaded servers.
	      Default: no

       MailMaxRecursion NUMBER (OBSOLETE)
	      WARNING: This option is no longer accepted. See MaxRecursion.

       PhishingSignatures BOOL
	      With this option enabled ClamAV will try to detect phishing attempts by using signatures.
	      Default: yes

       PhishingScanURLs BOOL
	      Scan  URLs  found  in mails for phishing attempts using heuristics. This will classify "Possibly Unwanted" phishing emails as Phish-
	      ing.Heuristics.Email.*
	      Default: yes

       PhishingAlwaysBlockSSLMismatch BOOL
	      Always block SSL mismatches in URLs, even if the URL isn't in the database. This can lead to false positives.
	      Default: no

       PhishingAlwaysBlockCloak BOOL
	      Always block cloaked URLs, even if URL isn't in database. This can lead to false positives.
	      Default: no

       HeuristicScanPrecedence BOOL
	      Allow heuristic match to take precedence. When enabled, if a heuristic scan (such as phishingScan) detects a possible virus/phishing
	      it  will stop scanning immediately. Recommended, saves CPU scan-time. When disabled, virus/phishing detected by heuristic scans will
	      be reported only at the end of a scan. If an archive contains both a heuristically detected virus/phishing, and a real malware,  the
	      real malware will be reported. Keep this disabled if you intend to handle "*.Heuristics.*" viruses  differently from "real" malware.
	      If a non-heuristically-detected virus (signature-based) is found first, the scan is interrupted immediately, regardless of this con-
	      fig option.
	      Default: no

       StructuredDataDetection BOOL
	      Enable the DLP module.
	      Default: no

       StructuredMinCreditCardCount NUMBER
	      This option sets the lowest number of Credit Card numbers found in a file to generate a detect.
	      Default: 3

       StructuredMinSSNCount NUMBER
	      This option sets the lowest number of Social Security Numbers found in a file to generate a detect.
	      Default: 3

       StructuredSSNFormatNormal BOOL
	      With this option enabled the DLP module will search for valid SSNs formatted as xxx-yy-zzzz.
	      Default: Yes

       StructuredSSNFormatStripped BOOL
	      With this option enabled the DLP module will search for valid SSNs formatted as xxxyyzzzz.
	      Default: No

       ScanArchive BOOL
	      Enable archive scanning.
	      Default: yes

       ArchiveMaxFileSize (OBSOLETE)
	      WARNING: This option is no longer accepted. See MaxFileSize and MaxScanSize.

       ArchiveMaxRecursion (OBSOLETE)
	      WARNING: This option is no longer accepted. See MaxRecursion.

       ArchiveMaxFiles (OBSOLETE)
	      WARNING: This option is no longer accepted. See MaxFiles.

       ArchiveMaxCompressionRatio (OBSOLETE)
	      WARNING: This option is no longer accepted.

       ArchiveBlockMax (OBSOLETE)
	      WARNING: This option is no longer accepted.

       ArchiveLimitMemoryUsage (OBSOLETE)
	      WARNING: This option is no longer accepted.
	      Default: no

       ArchiveBlockEncrypted BOOL
	      Mark encrypted archives as viruses (Encrypted.Zip, Encrypted.RAR).
	      Default: no

       MaxScanSize SIZE
	      Sets  the  maximum  amount  of  data  to be scanned for each input file. Archives and other containers are recursively extracted and
	      scanned up to this value. Warning: disabling this limit or setting it too high may result in severe damage to the system.
	      Default: 100M

       MaxFileSize SIZE
	      Files larger than this limit won't be scanned. Affects the input file itself as well as files contained inside it  (when	the  input
	      file  is an archive, a document or some other kind of container). Warning: disabling this limit or setting it too high may result in
	      severe damage to the system.
	      Default: 25M

       MaxRecursion NUMBER
	      Nested archives are scanned recursively, e.g. if a Zip archive contains a RAR file, all files within it will also be  scanned.  This
	      options  specifies  how  deeply the process should be continued. Warning: setting this limit too high may result in severe damage to
	      the system.
	      Default: 16

       MaxFiles NUMBER
	      Number of files to be scanned within an archive, a document, or any other kind of container. Warning: disabling this limit  or  set-
	      ting it too high may result in severe damage to the system.
	      Default: 10000

       ClamukoScanOnAccess BOOL
	      Enable Clamuko. Dazuko (/dev/dazuko) must be configured and running.
	      Default: no

       ClamukoScannerCount NUMBER
	      The number of scanner threads that will be started (DazukoFS only). Having multiple scanner threads allows Clamuko to serve multiple
	      processes simultaneously. This is particularly beneficial on SMP machines.
	      Default: 3

       ClamukoScanOnOpen BOOL
	      Scan files on open.
	      Default: no

       ClamukoScanOnClose BOOL
	      Scan files on close.
	      Default: no.

       ClamukoScanOnExec BOOL
	      Scan files on execute.
	      Default: no

       ClamukoIncludePath STRING
	      Set the include paths (all files and directories inside them will be scanned). You can have multiple  ClamukoIncludePath	directives
	      but each directory must be added in a separate line).
	      Default: no

       ClamukoExcludePath STRING
	      Set the exclude paths. All subdirectories will also be excluded.
	      Default: no

       ClamukoMaxFileSize SIZE
	      Ignore files larger than SIZE.
	      Default: 5M

NOTES

       All options expressing a size are limited to max 4GB. Values in excess will be resetted to the maximum.

FILES

       /etc/clamd.conf

AUTHOR

       Tomasz Kojm <tkojm@clamav.net>

SEE ALSO

       clamd(8), clamdscan(1), clamav-milter(8), freshclam(1), freshclam.conf(5)

ClamAV 0.96.1							 February 12, 2007						     clamd.conf(5)