freshclam.conf(5) Clam AntiVirus freshclam.conf(5)
freshclam.conf - Configuration file for Clam AntiVirus database update tool
The file freshclam.conf configures the Clam AntiVirus Database Updater, freshclam(1).
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.
When an option is not used (hashed or doesn't exist in the configuration file) freshclam takes a default action.
If this option is set freshclam will not run.
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
Log time with each message.
Enable logging to Syslog. May be used in combination with UpdateLogFile.
Specify the type of syslog messages - please refer to 'man syslog' for facility names.
Enable verbose logging.
Rotate log file. Requires LogFileMaxSize option set prior to this option.
This option allows you to save the process identifier of the daemon to a file specified in the argument.
Path to a directory containing database files.
Don't fork into background.
Enable debug messages in libclamav.
Initialize supplementary group access (freshclam must be started by root).
Enable logging to a specified file. Highly recommended.
When started by root, drop privileges to a specified user.
Number of database checks per day.
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 specifies to which mirror(s) freshclam should connect. You should have at least two entries: db.XY.clamav.net (or
db.XY.ipv6.clamav.net for IPv6) and database.clamav.net (in this order). Please replace XY with your country code (see
http://www.iana.org/cctld/cctld-whois.htm). database.clamav.net is a round-robin record which points to our most reliable mirrors.
It's used as a fall back in case db.XY.clamav.net is not working.
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 down-
load the CVD file. This option overrides DatabaseMirror, DNSDatabaseInfo and ScriptedUpdates. It can be used multiple times to pro-
vide fall-back mirrors.
How many attempts (per mirror) to make before giving up.
Default: 3 (per mirror)
With this option you can control scripted updates. It's highly recommended to keep it enabled.
With this option enabled, freshclam will attempt to load new databases into memory to make sure they are properly handled by libcla-
mav before replacing the old ones.
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.
Download an additional 3rd party signature database distributed through the ClamAV mirrors. This option can be used multiple times.
Here you can find a list of available databases: http://www.clamav.net/download/cvd/3rdparty
With this option you can provide custom sources (http:// or file://) for database files. This option can be used multiple times.
HTTPProxyServer STR, HTTPProxyPort NUMBER
Use given proxy server and TCP port for database downloads. HTTPProxyPort defaults to 8080.
HTTPProxyUsername STR,HTTPProxyPassword STRING
Proxy usage is authenticated through given username and password.
If your servers are behind a firewall/proxy which applies User-Agent filtering, you can use this option to force the use of a dif-
ferent User-Agent header.
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
Execute this command after the database has been successfully updated.
Execute this command after a database update has failed.
Execute this command when freshclam reports outdated version. In the command string %v will be replaced by the new version number.
Use IP as client address for downloading databases. Useful for multi homed systems.
Default: Use OS'es default outgoing IP address.
Timeout in seconds when connecting to database server.
Timeout in seconds when reading from database server.
When enabled freshclam will submit statistics to the ClamAV Project about the latest virus detections in your environment. The Cla-
mAV maintainers will then use this data to determine what types of malware are the most detected in the field and in what geographic
area they are. Freshclam will connect to clamd in order to get the recent statistics. The path for clamd.conf file must be provided.
Country of origin of malware/detection statistics (for statistical purposes only). The statistics collector at ClamAV.net will look
up your IP address to determine the geographical origin of the malware reported by your installation. If this installation is mainly
used to scan data which comes from a different location, please enable this option and enter a two-letter code (see
http://www.iana.org/domains/root/db/) of the country of origin.
This option enables support for our "Personal Statistics" service. When this option is enabled, the information on malware detected
by your clamd installation is made available to you through our website. To get your HostID, log on http://www.stats.clamav.net and
add a new host to your host list. Once you have the HostID, uncomment this option and paste the HostID here. As soon as your fresh-
clam starts submitting information to our stats collecting service, you will be able to view the statistics of this clamd installa-
tion by logging into http://www.stats.clamav.net with the same credentials you used to generate the HostID. For more information
refer to: http://www.clamav.net/support/faq/faq-cctts/. This feature requires SubmitDetectionStats to be enabled.
This option enables support for Google Safe Browsing. When activated for the first time, freshclam will download a new database file
(safebrowsing.cvd) which will be automatically loaded by clamd and clamscan during the next reload, provided that the heuristic
phishing detection is turned on. This database includes information about websites that may be phishing sites or possible sources of
malware. When using this option, it's mandatory to run freshclam at least every 30 minutes. Freshclam uses the ClamAV's mirror in-
http://code.google.com/support/bin/answer.py?answer=70015 and http://safebrowsing.clamav.net for more information.
This option enables downloading of bytecode.cvd, which includes additional detection mechanisms and improvements to the ClamAV
Thomas Lamy <firstname.lastname@example.org>, Tomasz Kojm <email@example.com>, Kevin Lin <firstname.lastname@example.org>
freshclam(1), clamd.conf(5), clamd(8), clamscan(1)
ClamAV 0.98.4 December 4, 2013 freshclam.conf(5)