Centos 8インストールのClamav
Centos 8にClamAVをインストールしました。
Freshclamを実行しましたが、正常に動作しますが、スキャンを実行しようとすると、次のエラーが発生します。
clamdscan /home
ERROR: Could not connect to clamd on LocalSocket /tmp/clamd.socket: No such file or directory
----------- SCAN SUMMARY -----------
Infected files: 0
Total errors: 1
Time: 0.000 sec (0 m 0 s)
私はさまざまなLocalSocketファイルについてオンラインで多くの提案を試してみましたが、すべて同じ結果またはより悪い結果をもたらします。
これは私の設定ファイルです
##
## Example config file for the Clam AV daemon
## Please read the clamd.conf(5) manual before editing this file.
##
# Uncomment this option to enable logging.
# LogFile must be writable for the user running daemon.
# A full path is required.
# Default: disabled
LogFile /tmp/clamd.log
# By default the log file is locked for writing - the lock protects against
# running clamd multiple times (if want to run another clamd, please
# copy the configuration file, change the LogFile variable, and run
# the daemon with --config-file option).
# This option disables log file locking.
# Default: no
#LogFileUnlock yes
# Maximum size of the log file.
# Value of 0 disables the limit.
# You may use 'M' or 'm' for megabytes (1M = 1m = 1048576 bytes)
# and 'K' or 'k' for kilobytes (1K = 1k = 1024 bytes). To specify the size
# in bytes just don't use modifiers. If LogFileMaxSize is enabled, log
# rotation (the LogRotate option) will always be enabled.
# Default: 1M
LogFileMaxSize 10M
# Log time with each message.
# Default: no
LogTime yes
# Also log clean files. Useful in debugging but drastically increases the
# log size.
# Default: no
#LogClean yes
# Use system logger (can work together with LogFile).
# Default: no
#LogSyslog yes
# Specify the type of syslog messages - please refer to 'man syslog'
# for facility names.
# Default: LOG_LOCAL6
#LogFacility LOG_MAIL
# Enable verbose logging.
# Default: no
LogVerbose yes
# Enable log rotation. Always enabled when LogFileMaxSize is enabled.
# Default: no
#LogRotate yes
# Enable Prelude output.
# Default: no
#PreludeEnable yes
#
# Set the name of the analyzer used by prelude-admin.
# Default: ClamAV
#PreludeAnalyzerName ClamAV
# Log additional information about the infected file, such as its
# size and hash, together with the virus name.
#ExtendedDetectionInfo yes
# This option allows you to save a process identifier of the listening
# daemon (main thread).
# Default: disabled
#PidFile /var/run/clamd.pid
# Optional path to the global temporary directory.
# Default: system specific (usually /tmp or /var/tmp).
#TemporaryDirectory /var/tmp
# Path to the database directory.
# Default: hardcoded (depends on installation options)
#DatabaseDirectory /var/lib/clamav
# Only load the official signatures published by the ClamAV project.
# Default: no
#OfficialDatabaseOnly no
# The daemon can work in local mode, network mode or both.
# Due to security reasons we recommend the local mode.
# Path to a local socket file the daemon will listen on.
# Default: disabled (must be specified by a user)
LocalSocket /tmp/clamd.socket
# Sets the group ownership on the unix socket.
# Default: disabled (the primary group of the user running clam
#LocalSocketGroup clamav
# Sets the permissions on the unix socket to the specified mode.
# Default: disabled (socket is world accessible)
LocalSocketMode 660
# Remove stale socket after unclean shutdown.
# Default: yes
#FixStaleSocket yes
# TCP port address.
# Default: no
#TCPSocket 3310
# TCP address.
# By default we bind to INADDR_ANY, probably not wise.
# Enable the following to provide some degree of protection
# from the outside world. This option can be specified multiple
# times if you want to listen on multiple IPs. IPv6 is now supported.
# Default: no
#TCPAddr 127.0.0.1
# Maximum length the queue of pending connections may grow to.
# Default: 200
#MaxConnectionQueueLength 30
# 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 options below.
# Close the connection when the data size limit is exceeded.
# The value should match your MTA's limit for a maximum attachment size.
# Default: 25M
#StreamMaxLength 10M
# Limit port range.
# Default: 1024
#StreamMinPort 30000
# Default: 2048
#StreamMaxPort 32000
# Maximum number of threads running at the same time.
# Default: 10
#MaxThreads 20
# Waiting for data from a client socket will timeout after this time (seconds).
# Default: 120
#ReadTimeout 300
# This option specifies the time (in seconds) after which clamd should
# timeout if a client doesn't provide any initial command after connecting.
# Default: 30
#CommandReadTimeout 30
# 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
#SendBufTimeout 200
# 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:
# MaxThreads*MaxRecursion + (MaxQueue - MaxThreads) + 6< RLIMIT_NOFILE (usual
# max is 1024).
#
# Default: 100
#MaxQueue 200
# Waiting for a new job will timeout after this time (seconds).
# Default: 30
#IdleTimeout 60
# Don't scan files and directories matching regex
# This directive can be used multiple times
# Default: scan all
#ExcludePath ^/proc/
#ExcludePath ^/sys/
# Maximum depth directories are scanned at.
# Default: 15
#MaxDirectoryRecursion 20
# Follow directory symlinks.
# Default: no
#FollowDirectorySymlinks yes
# Follow regular file symlinks.
# Default: no
#FollowFileSymlinks yes
# Scan files and directories on other filesystems.
# Default: yes
#CrossFilesystems yes
# Perform a database check.
# Default: 600 (10 min)
#SelfCheck 600
# Execute a command when virus is found. In the command string %v will
# be replaced with the virus name.
# Default: no
#VirusEvent /usr/local/bin/send_sms 123456789 "VIRUS ALERT: %v"
# Run as another user (clamd must be started by root for this option to work)
# Default: don't drop privileges
User clamscan
# Stop daemon when libclamav reports out of memory condition.
#ExitOnOOM yes
# Don't fork into background.
# Default: no
#Foreground yes
# Enable debug messages in libclamav.
# Default: no
#Debug yes
# Do not remove temporary files (for debug purposes).
# Default: no
#LeaveTemporaryFiles yes
# Permit use of the ALLMATCHSCAN command. If set to no, clamd will reject
# any ALLMATCHSCAN command as invalid.
# Default: yes
#AllowAllMatchScan no
# Detect Possibly Unwanted Applications.
# Default: no
#DetectPUA yes
# Exclude a specific PUA category. This directive can be used multiple times.
# See https://github.com/vrtadmin/clamav-faq/blob/master/faq/faq-pua.md for
# the complete list of PUA categories.
# Default: Load all categories (if DetectPUA is activated)
#ExcludePUA NetTool
#ExcludePUA PWTool
# Only include a specific PUA category. This directive can be used multiple
# times.
# Default: Load all categories (if DetectPUA is activated)
#IncludePUA Spy
#IncludePUA Scanner
#IncludePUA RAT
# This option causes memory or nested map scans to dump the content to disk.
# If you turn on this option, more data is written to disk and is available
# when the LeaveTemporaryFiles option is enabled.
#ForceToDisk yes
# This option allows you to disable the caching feature of the engine. By
# default, the engine will store an MD5 in a cache of any files that are
# not flagged as virus or that hit limits checks. Disabling the cache will
# have a negative performance impact on large scans.
# Default: no
#DisableCache yes
# In some cases (eg. complex malware, exploits in graphic files, and others),
# ClamAV uses special algorithms to detect abnormal patterns and behaviors that
# may be malicious. This option enables alerting on such heuristically
# detected potential threats.
# Default: yes
#HeuristicAlerts yes
# Allow heuristic alerts to take precedence.
# When enabled, if a heuristic scan (such as phishingScan) detects
# a possible virus/phish it will stop scan immediately. Recommended, saves CPU
# scan-time.
# When disabled, virus/phish detected by heuristic scans will be reported only
# at the end of a scan. If an archive contains both a heuristically detected
# virus/phish, 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 config option.
#
# Default: no
#HeuristicScanPrecedence yes
##
## Heuristic Alerts
##
# With this option clamav will try to detect broken executables (both PE and
# ELF) and alert on them with the Broken.Executable heuristic signature.
# Default: no
#AlertBrokenExecutables yes
# Alert on encrypted archives _and_ documents with heuristic signature
# (encrypted .Zip, .7Zip, .rar, .pdf).
# Default: no
#AlertEncrypted yes
# Alert on encrypted archives with heuristic signature (encrypted .Zip, .7Zip,
# .rar).
# Default: no
#AlertEncryptedArchive yes
# Alert on encrypted archives with heuristic signature (encrypted .pdf).
# Default: no
#AlertEncryptedDoc yes
# With this option enabled OLE2 files containing VBA macros, which were not
# detected by signatures will be marked as "Heuristics.OLE2.ContainsMacros".
# Default: no
#AlertOLE2Macros yes
# Alert on SSL mismatches in URLs, even if the URL isn't in the database.
# This can lead to false positives.
# Default: no
#AlertPhishingSSLMismatch yes
# Alert on cloaked URLs, even if URL isn't in database.
# This can lead to false positives.
# Default: no
#AlertPhishingCloak yes
# Alert on raw DMG image files containing partition intersections
# Default: no
#AlertPartitionIntersection yes
##
## Executable files
##
# 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, FSG,
# and Petite. If you turn off this option, the original files will still be
# scanned, but without additional processing.
# Default: yes
#ScanPE yes
# Certain PE files contain an authenticode signature. By default, we check
# the signature chain in the PE file against a database of trusted and
# revoked certificates if the file being scanned is marked as a virus.
# If any certificate in the chain validates against any trusted root, but
# does not match any revoked certificate, the file is marked as whitelisted.
# If the file does match a revoked certificate, the file is marked as virus.
# The following setting completely turns off authenticode verification.
# Default: no
#DisableCertCheck yes
# Executable and Linking Format is a standard format for UN*X executables.
# This option allows you to control the scanning of ELF files.
# If you turn off this option, the original files will still be scanned, but
# without additional processing.
# Default: yes
#ScanELF yes
##
## Documents
##
# This option enables scanning of OLE2 files, such as Microsoft Office
# documents and .msi files.
# If you turn off this option, the original files will still be scanned, but
# without additional processing.
# Default: yes
#ScanOLE2 yes
# This option enables scanning within PDF files.
# If you turn off this option, the original files will still be scanned, but
# without decoding and additional processing.
# Default: yes
#ScanPDF yes
# This option enables scanning within SWF files.
# If you turn off this option, the original files will still be scanned, but
# without decoding and additional processing.
# Default: yes
#ScanSWF yes
# This option enables scanning xml-based document files supported by libclamav.
# If you turn off this option, the original files will still be scanned, but
# without additional processing.
# Default: yes
#ScanXMLDOCS yes
# This option enables scanning of HWP3 files.
# If you turn off this option, the original files will still be scanned, but
# without additional processing.
# Default: yes
#ScanHWP3 yes
##
## Mail files
##
# Enable internal e-mail scanner.
# If you turn off this option, the original files will still be scanned, but
# without parsing individual messages/attachments.
# Default: yes
ScanMail yes
# 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
#ScanPartialMessages yes
# With this option enabled ClamAV will try to detect phishing attempts by using
# HTML.Phishing and Email.Phishing NDB signatures.
# Default: yes
#PhishingSignatures no
# With this option enabled ClamAV will try to detect phishing attempts by
# analyzing URLs found in emails using WDB and PDB signature databases.
# Default: yes
#PhishingScanURLs no
##
## Data Loss Prevention (DLP)
##
# Enable the DLP module
# Default: No
#StructuredDataDetection yes
# This option sets the lowest number of Credit Card numbers found in a file
# to generate a detect.
# Default: 3
#StructuredMinCreditCardCount 5
# This option sets the lowest number of Social Security Numbers found
# in a file to generate a detect.
# Default: 3
#StructuredMinSSNCount 5
# With this option enabled the DLP module will search for valid
# SSNs formatted as xxx-yy-zzzz
# Default: yes
#StructuredSSNFormatNormal yes
# With this option enabled the DLP module will search for valid
# SSNs formatted as xxxyyzzzz
# Default: no
#StructuredSSNFormatStripped yes
##
## HTML
##
# Perform HTML normalisation and decryption of MS Script Encoder code.
# Default: yes
# If you turn off this option, the original files will still be scanned, but
# without additional processing.
#ScanHTML yes
##
## Archives
##
# ClamAV can scan within archives and compressed files.
# If you turn off this option, the original files will still be scanned, but
# without unpacking and additional processing.
# Default: yes
#ScanArchive yes
##
## Limits
##
# The options below protect your system against Denial of Service attacks
# using archive bombs.
# This option sets the maximum amount of time to a scan may take.
# In this version, this field only affects the scan time of Zip archives.
# Value of 0 disables the limit.
# Note: disabling this limit or setting it too high may result allow scanning
# of certain files to lock up the scanning process/threads resulting in a
# Denial of Service.
# Time is in milliseconds.
# Default: 120000
#MaxScanTime 300000
# This option 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.
# Value of 0 disables the limit
# Note: disabling this limit or setting it too high may result in severe damage
# to the system.
# Default: 100M
#MaxScanSize 150M
# 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).
# Value of 0 disables the limit.
# Note: disabling this limit or setting it too high may result in severe damage
# to the system.
# Default: 25M
#MaxFileSize 30M
# 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.
# Note: setting this limit too high may result in severe damage to the system.
# Default: 16
#MaxRecursion 10
# Number of files to be scanned within an archive, a document, or any other
# container file.
# Value of 0 disables the limit.
# Note: disabling this limit or setting it too high may result in severe damage
# to the system.
# Default: 10000
#MaxFiles 15000
# Maximum size of a file to check for embedded PE. Files larger than this value
# will skip the additional analysis step.
# Note: disabling this limit or setting it too high may result in severe damage
# to the system.
# Default: 10M
#MaxEmbeddedPE 10M
# Maximum size of a HTML file to normalize. HTML files larger than this value
# will not be normalized or scanned.
# Note: disabling this limit or setting it too high may result in severe damage
# to the system.
# Default: 10M
#MaxHTMLNormalize 10M
# Maximum size of a normalized HTML file to scan. HTML files larger than this
# value after normalization will not be scanned.
# Note: disabling this limit or setting it too high may result in severe damage
# to the system.
# Default: 2M
#MaxHTMLNoTags 2M
# Maximum size of a script file to normalize. Script content larger than this
# value will not be normalized or scanned.
# Note: disabling this limit or setting it too high may result in severe damage
# to the system.
# Default: 5M
#MaxScriptNormalize 5M
# Maximum size of a Zip file to reanalyze type recognition. Zip files larger
# than this value will skip the step to potentially reanalyze as PE.
# Note: disabling this limit or setting it too high may result in severe damage
# to the system.
# Default: 1M
#MaxZipTypeRcg 1M
# This option sets the maximum number of partitions of a raw disk image to be
# scanned.
# Raw disk images with more partitions than this value will have up to
# the value number partitions scanned. Negative values are not allowed.
# Note: setting this limit too high may result in severe damage or impact
# performance.
# Default: 50
#MaxPartitions 128
# This option sets the maximum number of icons within a PE to be scanned.
# PE files with more icons than this value will have up to the value number
# icons scanned.
# Negative values are not allowed.
# WARNING: setting this limit too high may result in severe damage or impact
# performance.
# Default: 100
#MaxIconsPE 200
# This option sets the maximum recursive calls for HWP3 parsing during
# scanning. HWP3 files using more than this limit will be terminated and
# alert the user.
# Scans will be unable to scan any HWP3 attachments if the recursive limit
# is reached.
# Negative values are not allowed.
# WARNING: setting this limit too high may result in severe damage or impact
# performance.
# Default: 16
#MaxRecHWP3 16
# This option sets the maximum calls to the PCRE match function during
# an instance of regex matching.
# Instances using more than this limit will be terminated and alert the user
# but the scan will continue.
# For more information on match_limit, see the PCRE documentation.
# Negative values are not allowed.
# WARNING: setting this limit too high may severely impact performance.
# Default: 100000
#PCREMatchLimit 20000
# This option sets the maximum recursive calls to the PCRE match function
# during an instance of regex matching.
# Instances using more than this limit will be terminated and alert the user
# but the scan will continue.
# For more information on match_limit_recursion, see the PCRE documentation.
# Negative values are not allowed and values > PCREMatchLimit are superfluous.
# WARNING: setting this limit too high may severely impact performance.
# Default: 2000
#PCRERecMatchLimit 10000
# This option sets the maximum filesize for which PCRE subsigs will be
# executed. Files exceeding this limit will not have PCRE subsigs executed
# unless a subsig is encompassed to a smaller buffer.
# Negative values are not allowed.
# Setting this value to zero disables the limit.
# WARNING: setting this limit too high or disabling it may severely impact
# performance.
# Default: 25M
#PCREMaxFileSize 100M
# When AlertExceedsMax is set, files exceeding the MaxFileSize, MaxScanSize, or
# MaxRecursion limit will be flagged with the virus
# "Heuristics.Limits.Exceeded".
# Default: no
#AlertExceedsMax yes
##
## On-access Scan Settings
##
# Don't scan files larger than OnAccessMaxFileSize
# Value of 0 disables the limit.
# Default: 5M
#OnAccessMaxFileSize 10M
# Max number of scanning threads to allocate to the OnAccess thread pool at
# startup. These threads are the ones responsible for creating a connection
# with the daemon and kicking off scanning after an event has been processed.
# To prevent clamonacc from consuming all clamd's resources keep this lower
# than clamd's max threads.
# Default: 5
#OnAccessMaxThreads 10
# Max amount of time (in milliseconds) that the OnAccess client should spend
# for every connect, send, and recieve attempt when communicating with clamd
# via curl.
# Default: 5000 (5 seconds)
# OnAccessCurlTimeout 10000
# Toggles dynamic directory determination. Allows for recursively watching
# include paths.
# Default: no
#OnAccessDisableDDD yes
# Set the include paths (all files inside them will be scanned). You can have
# multiple OnAccessIncludePath directives but each directory must be added
# in a separate line.
# Default: disabled
#OnAccessIncludePath /home
#OnAccessIncludePath /students
# Set the exclude paths. All subdirectories are also excluded.
# Default: disabled
#OnAccessExcludePath /home/user
# Modifies fanotify blocking behaviour when handling permission events.
# If off, fanotify will only notify if the file scanned is a virus,
# and not perform any blocking.
# Default: no
#OnAccessPrevention yes
# When using prevention, if this option is turned on, any errors that occur
# during scanning will result in the event attempt being denied. This could
# potentially lead to unwanted system behaviour with certain configurations,
# so the client defaults this to off and prefers allowing access events in
# case of scan or connection error.
# Default: no
#OnAccessDenyOnError yes
# Toggles extra scanning and notifications when a file or directory is
# created or moved.
# Requires the DDD system to kick-off extra scans.
# Default: no
#OnAccessExtraScanning yes
# Set the mount point to be scanned. The mount point specified, or the mount
# point containing the specified directory will be watched. If any directories
# are specified, this option will preempt (disable and ignore all options
# related to) the DDD system. This option will result in verdicts only.
# Note that prevention is explicitly disallowed to prevent common, fatal
# misconfigurations. (e.g. watching "/" with prevention on and no exclusions
# made on vital system directories)
# It can be used multiple times.
# Default: disabled
#OnAccessMountPath /
#OnAccessMountPath /home/user
# With this option you can whitelist the root UID (0). Processes run under
# root with be able to access all files without triggering scans or
# permission denied events.
# Note that if clamd cannot check the uid of the process that generated an
# on-access scan event (e.g., because OnAccessPrevention was not enabled, and
# the process already exited), clamd will perform a scan. Thus, setting
# OnAccessExcludeRootUID is not *guaranteed* to prevent every access by the
# root user from triggering a scan (unless OnAccessPrevention is enabled).
# Default: no
#OnAccessExcludeRootUID no
# With this option you can whitelist specific UIDs. Processes with these UIDs
# will be able to access all files without triggering scans or permission
# denied events.
# This option can be used multiple times (one per line).
# Using a value of 0 on any line will disable this option entirely.
# To whitelist the root UID (0) please enable the OnAccessExcludeRootUID
# option.
# Also note that if clamd cannot check the uid of the process that generated an
# on-access scan event (e.g., because OnAccessPrevention was not enabled, and
# the process already exited), clamd will perform a scan. Thus, setting
さらに、clamd @ scanは起動しません。
systemctl status [email protected]
● [email protected] - clamd scanner (scan) daemon
Loaded: loaded (/usr/lib/systemd/system/[email protected]; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Fri 2020-03-20 16:43:51 GMT; 14s ago
Process: 1851 ExecStart=/usr/sbin/clamd --foreground=yes (code=exited, status=203/EXEC)
Main PID: 1851 (code=exited, status=203/EXEC)
Mar 20 16:43:51 server.com systemd[1]: [email protected]: Main process exited, code=exited, status=203/EXEC
Mar 20 16:43:51 server.com systemd[1]: [email protected]: Failed with result 'exit-code'.
Mar 20 16:43:51 server.com systemd[1]: [email protected]: Service RestartSec=100ms expired, scheduling restart.
Mar 20 16:43:51 server.com systemd[1]: [email protected]: Scheduled restart job, restart counter is at 5.
Mar 20 16:43:51 server.com systemd[1]: Stopped clamd scanner (scan) daemon.
Mar 20 16:43:51 server.com systemd[1]: [email protected]: Start request repeated too quickly.
Mar 20 16:43:51 server.com systemd[1]: [email protected]: Failed with result 'exit-code'.
Mar 20 16:43:51 server.com systemd[1]: Failed to start clamd scanner (scan) daemon.
"clamdは開始しません" の投稿に記載されているいくつかの解決策があります。これは、この "ERROR: Could not connect to clamd on LocalSocket"の問題の解決に役立つ場合があります。
構成ファイルのこれらの両方の行がコメント化されていないことを確認するための1つの解決策の言及
LocalSocket /tmp/clamd.socket
FixStaleSocket yes
これらのコマンドも実行するには
mkdir /var/run/clamd
chown root:<same group name that clamd runs as> /var/run/clamd
次に、clamdサービスを再起動し、yumを介してClamAVを最新バージョンに更新することも検討してください。
さらに、OPは/usr/lib/systemd/systemでExecStart = /usr/local/sbin/clamdを使用してclamdのシステムユニットを作成しました。
さらに、cat /etc/passwdを実行してclamavユーザーの権限を確認し、権限をclamavユーザーに戻すことも記載されています。
chown -R clamav.clamav /var/log/clamav/
chown -R clamav.clamav /var/run/clamav/
chown -R clamav.clamav /var/lib/clamav/