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.
    Default: /var/db/clamav

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

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

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

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

FollowDirectorySymlinks BOOL
    Follow directory symlinks.
    Default: no

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

DetectPUA
    Detect Possibly Unwanted Applications.
    Default: No

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 executable 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: no

ScanHTML BOOL
    Enables HTML detection and normalisation.
    Default: yes

ScanMail BOOL
    Enable scanning of mail files.
    Default: yes

MailFollowURLs BOOL
    If an email contains URLs ClamAV can download and scan them. WARNING: This option may open your system to a DoS attack. Never use it on loaded servers.
    Default: no

MailMaxRecursion NUMBER
    Recursion level limit for the mail scanner.
    Default: 64

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 Phishing.Heuristics.Email.*
    Default: yes

PhishingRestrictedScan BOOL
    Use phishing detection only for domains listed in the .pdb database. It is not recommended to have this option turned off, because scanning of all domains may lead to many false positives!
    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

ScanArchive BOOL
    Enable archive scanning.
    Default: yes

ArchiveMaxFileSize SIZE
    Files in archives larger than this limit won't be scanned. Value of 0 disables the limit.
    Default: 10M

ArchiveMaxRecursion NUMBER
    Limit archive recursion level. Value of 0 disables the limit.
    Default: 8

ArchiveMaxFiles NUMBER
    Number of files to be scanned within an archive. Value of 0 disables the limit.
    Default: 1000

ArchiveMaxCompressionRatio NUMBER
    Analyze compression ratio of every file in an archive and mark potential archive bombs as viruses (0 disables the limit).
    Default: 250

ArchiveLimitMemoryUsage BOOL
    Use slower decompression algorithm which uses less memory. This option only affects the bzip2 decompressor.
    Default: no

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

ArchiveBlockMax BOOL
    Mark archives as viruses (e.g RAR.ExceededFileSize, Zip.ExceededFilesLimit) if ArchiveMaxFiles, ArchiveMaxFileSize, or ArchiveMaxRecursion limit is reached.
    Default: no

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

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

FILES

/usr/local/etc/clamd.conf

AUTHOR

Tomasz Kojm <tkojm@clamav.net>

SEE ALSO

clamd(8), clamdscan(1), clamav-milter(8), clamscan(1), freshclam(1), sigtool(1)