Ubuntu Manpage: freshclam.conf - Configuration file for Clam AntiVirus database update tool

Provided by: clamav-freshclam_1.4.3+dfsg-0ubuntu0.25.04.1_amd64

NAME

       freshclam.conf - Configuration file for Clam AntiVirus database update tool

DESCRIPTION

       The file freshclam.conf configures the Clam AntiVirus Database Updater, freshclam(1).

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 an option is not used (hashed or doesn't exist in the configuration file) freshclam takes a default
action.

Example
If this option is set freshclam will not run.

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 with each message.
Default: no

LogSyslog BOOL
Enable logging to Syslog. May be used in combination with UpdateLogFile.
Default: disabled.

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: disabled

LogRotate BOOL
Rotate log file. Requires LogFileMaxSize option set prior to this option.
Default: no

PidFile STRING
Write the daemon's pid to the specified file.
Default: disabled

DatabaseDirectory STRING
Path to a directory containing database files. This directory must already exist, be an absolute
path, be writeable by freshclam and readable by clamd/clamscan.
Default: /var/lib/clamav

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

Debug BOOL
Enable debug messages in libclamav.
Default: no

UpdateLogFile STRING
Enable logging to a specified file. Highly recommended.
Default: disabled.

DatabaseOwner STRING
When started by root, drop privileges to a specified user.
Default: clamav

Checks NUMBER
Number of database checks per day.
Default: 12

DNSDatabaseInfo STRING
Use DNS to verify the virus database version. FreshClam uses DNS TXT records to verify the
versions of the database and software itself. With this directive you can change the database
verification domain.
WARNING: Please don't change it unless you're configuring freshclam to use your own database
verification domain.
Default: enabled, pointing to current.cvd.clamav.net

DatabaseMirror STRING
DatabaseMirror specifies to which mirror(s) freshclam should connect. You should have at least one
entries: database.clamav.net. Now that CloudFlare is being used as our Content Delivery Network
(CDN), this one domain name works world-wide to direct freshclam to the closest geographic
endpoint.
Default: database.clamav.net

PrivateMirror STR
This option allows you to easily point freshclam to private mirrors. If PrivateMirror is set,
freshclam does not attempt to use DNS to determine whether its databases are out-of-date, instead
it will use the If-Modified-Since request or directly check the headers of the remote database
files. For each database, freshclam first attempts to download the CLD file. If that fails, it
tries to download the CVD file. This option overrides DatabaseMirror, DNSDatabaseInfo and
ScriptedUpdates. It can be used multiple times to provide fall-back mirrors.
Default: disabled

MaxAttempts NUMBER
How many attempts (per mirror) to make before giving up.
Default: 3 (per mirror)

ScriptedUpdates BOOL
With this option you can control scripted updates. It's highly recommended to keep it enabled.
Default: yes

TestDatabases BOOL
With this option enabled, freshclam will attempt to load new databases into memory to make sure
they are properly handled by libclamav before replacing the old ones.
Default: enabled

CompressLocalDatabase BOOL
By default freshclam will keep the local databases (.cld) uncompressed to make their handling
faster. With this option you can enable the compression; the change will take effect with the next
database update.
Default: no

ExtraDatabase STRING
Download an additional 3rd party signature database distributed through the ClamAV mirrors. This
option can be used multiple times.
Default: disabled

ExcludeDatabase STRING
Exclude a standard signature database (opt-out). This option can be used multiple times.
Default: disabled

DatabaseCustomURL STRING
With this option you can provide custom sources for database files. This option can be used
multiple times. Support for:
http(s)://, ftp(s)://, or file:// Example usage:
DatabaseCustomURL https://myserver.com:4567/allow_list.wdb
Default: disabled

HTTPProxyServer STR, HTTPProxyPort NUMBER
Use given proxy server and TCP port for database downloads. The HTTPProxyServer may be prefixed
with [scheme]:// to specify which kind of proxy is used.
http:// HTTP Proxy. Default when no scheme or proxy type is specified.
https:// HTTPS Proxy. (Added in 7.52.0 for OpenSSL, GnuTLS and NSS)
socks4:// SOCKS4 Proxy.
socks4a:// SOCKS4a Proxy. Proxy resolves URL hostname.
socks5:// SOCKS5 Proxy.
socks5h:// SOCKS5 Proxy. Proxy resolves URL hostname.

HTTPProxyUsername STR,HTTPProxyPassword STRING
Proxy usage is authenticated through given username and password.
Default: disabled

HTTPUserAgent STRING
If your servers are behind a firewall/proxy which applies User-Agent filtering, you can use this
option to force the use of a different User-Agent header. As of ClamAV 0.103.3, this setting may
not be used when updating from the clamav.net CDN and can only be used when updating from a
private mirror.
Default: clamav/version_number

NotifyClamd STRING
Notify a running clamd(8) to reload its database after a download has occurred. The path for
clamd.conf file must be provided.
Default: The default is to not notify clamd. See clamd.conf(5)'s option SelfCheck for how clamd(8)
handles database updates in this case.

OnUpdateExecute STRING
Execute this command after the database has been successfully updated.
Default: disabled

OnErrorExecute STRING
Execute this command after a database update has failed.
Default: disabled

OnOutdatedExecute STRING
Execute this command when freshclam reports outdated version. In the command string %v will be
replaced by the new version number.
Default: disabled

LocalIPAddress IP
Use IP as client address for downloading databases. Useful for multi homed systems.
Default: Use OS'es default outgoing IP address.

ConnectTimeout NUMBER
Timeout in seconds when connecting to database server.
Default: 10

ReceiveTimeout NUMBER
Maximum time in seconds for each download operation. 0 means no timeout.
Default: 0

Bytecode BOOL
This option enables downloading of bytecode.cvd, which includes additional detection mechanisms
and improvements to the ClamAV engine.
Default: yes

FILES

       /etc/clamav/freshclam.conf

AUTHOR