CentOS 6.6 클램(ClamAV) 안티바이러스 설치하기

[root@localhost ~]# clamscan -r /etc

LibClamAV Warning: **************************************************
LibClamAV Warning: ***  The virus database is older than 7 days!  ***
LibClamAV Warning: ***   Please update it as soon as possible.    ***
LibClamAV Warning: **************************************************
LibClamAV Error: Can’t load /var/lib/clamav/main.cvd: Can’t verify database integrity
LibClamAV Error: cli_loaddbdir(): error loading database /var/lib/clamav/main.cvd
ERROR: Can’t verify database integrity

———– SCAN SUMMARY ———–

Known viruses: 78529
Engine version: 0.99.1
Scanned directories: 0
Scanned files: 0
Infected files: 0
Data scanned: 0.00 MB
Data read: 0.00 MB (ratio 0.00:1)
Time: 0.306 sec (0 m 0 s)

I get this error when running freshclam: ERROR: Connection with ??? failed . What shall I do?

Either your dns servers are not working or you are blocking port 53/tcp. You should manually check that you can resolve hostnames with: $ host database.clamav.net. If it doesn’t work, check your dns settings in /etc/resolv.conf. If it works, check that you can receive dns answers longer than 512 bytes, e.g. check that your firewall is not blocking packets which originate from port 53/tcp. An easy way to find it out is: $ dig @ns1.clamav.net db.us.big.clamav.net

                       Clam AntiVirus Scanner 0.99.1
           By The ClamAV Team: http://www.clamav.net/about.html#credits
           (C) 2007-2015 Cisco Systems, Inc.

    –help                -h             Print this help screen
    –version             -V             Print version number
    –verbose             -v             Be verbose
    –archive-verbose     -a             Show filenames inside scanned archives
    –debug                              Enable libclamav’s debug messages
    –quiet                              Only output error messages
    –stdout                             Write to stdout instead of stderr
    –no-summary                         Disable summary at end of scanning
    –infected            -i             Only print infected files
    –suppress-ok-results -o             Skip printing OK files
    –bell                               Sound bell on virus detection
    –tempdir=DIRECTORY                  Create temporary files in DIRECTORY
    –leave-temps[=yes/no(*)]            Do not remove temporary files
    –database=FILE/DIR   -d FILE/DIR    Load virus database from FILE or load
                                         all supported db files from DIR
    –official-db-only[=yes/no(*)]       Only load official signatures
    –log=FILE            -l FILE        Save scan report to FILE
    –recursive[=yes/no(*)]  -r          Scan subdirectories recursively
    –allmatch[=yes/no(*)]   -z          Continue scanning within file after finding a match
    –cross-fs[=yes(*)/no]               Scan files and directories on other filesystems
    –follow-dir-symlinks[=0/1(*)/2]     Follow directory symlinks (0 = never, 1 = direct, 2 = always)
    –follow-file-symlinks[=0/1(*)/2]    Follow file symlinks (0 = never, 1 = direct, 2 = always)
    –file-list=FILE      -f FILE        Scan files from FILE
    –remove[=yes/no(*)]                 Remove infected files. Be careful!
    –move=DIRECTORY                     Move infected files into DIRECTORY
    –copy=DIRECTORY                     Copy infected files into DIRECTORY
    –exclude=REGEX                      Don’t scan file names matching REGEX
    –exclude-dir=REGEX                  Don’t scan directories matching REGEX
    –include=REGEX                      Only scan file names matching REGEX
    –include-dir=REGEX                  Only scan directories matching REGEX
    –bytecode[=yes(*)/no]               Load bytecode from the database
    –bytecode-unsigned[=yes/no(*)]      Load unsigned bytecode
    –bytecode-timeout=N                 Set bytecode timeout (in milliseconds)
    –statistics[=none(*)/bytecode/pcre] Collect and print execution statistics
    –detect-pua[=yes/no(*)]             Detect Possibly Unwanted Applications
    –exclude-pua=CAT                    Skip PUA sigs of category CAT
    –include-pua=CAT                    Load PUA sigs of category CAT
    –detect-structured[=yes/no(*)]      Detect structured data (SSN, Credit Card)
    –structured-ssn-format=X            SSN format (0=normal,1=stripped,2=both)
    –structured-ssn-count=N             Min SSN count to generate a detect
    –structured-cc-count=N              Min CC count to generate a detect
    –scan-mail[=yes(*)/no]              Scan mail files
    –phishing-sigs[=yes(*)/no]          Signature-based phishing detection
    –phishing-scan-urls[=yes(*)/no]     URL-based phishing detection
    –heuristic-scan-precedence[=yes/no(*)] Stop scanning as soon as a heuristic match is found
    –phishing-ssl[=yes/no(*)]           Always block SSL mismatches in URLs (phishing module)
    –phishing-cloak[=yes/no(*)]         Always block cloaked URLs (phishing module)
    –partition-intersection[=yes/no(*)] Detect partition intersections in raw disk images using heuristics.
    –algorithmic-detection[=yes(*)/no]  Algorithmic detection
    –scan-pe[=yes(*)/no]                Scan PE files
    –scan-elf[=yes(*)/no]               Scan ELF files
    –scan-ole2[=yes(*)/no]              Scan OLE2 containers
    –scan-pdf[=yes(*)/no]               Scan PDF files
    –scan-swf[=yes(*)/no]               Scan SWF files
    –scan-html[=yes(*)/no]              Scan HTML files
    –scan-xmldocs[=yes(*)/no]           Scan xml-based document files
    –scan-hwp3[=yes(*)/no]              Scan HWP3 files
    –scan-archive[=yes(*)/no]           Scan archive files (supported by libclamav)
    –detect-broken[=yes/no(*)]          Try to detect broken executable files
    –block-encrypted[=yes/no(*)]        Block encrypted archives
    –nocerts                            Disable authenticode certificate chain verification in PE files
    –dumpcerts                          Dump authenticode certificate chain in PE files
    –max-filesize=#n                    Files larger than this will be skipped and assumed clean
    –max-scansize=#n                    The maximum amount of data to scan for each container file (**)
    –max-files=#n                       The maximum number of files to scan for each container file (**)
    –max-recursion=#n                   Maximum archive recursion level for container file (**)
    –max-dir-recursion=#n               Maximum directory recursion level
    –max-embeddedpe=#n                  Maximum size file to check for embedded PE
    –max-htmlnormalize=#n               Maximum size of HTML file to normalize
    –max-htmlnotags=#n                  Maximum size of normalized HTML file to scan
    –max-scriptnormalize=#n             Maximum size of script file to normalize
    –max-ziptypercg=#n                  Maximum size zip to type reanalyze
    –max-partitions=#n                  Maximum number of partitions in disk image to be scanned
    –max-iconspe=#n                     Maximum number of icons in PE file to be scanned
    –max-rechwp3=#n                     Maximum recursive calls to HWP3 parsing function
    –pcre-match-limit=#n                Maximum calls to the PCRE match function.
    –pcre-recmatch-limit=#n             Maximum recursive calls to the PCRE match function.
    –pcre-max-filesize=#n               Maximum size file to perform PCRE subsig matching.
    –enable-stats                       Enable statistical reporting of malware
    –disable-pe-stats                   Disable submission of individual PE sections in stats submissions
    –stats-timeout=#n                   Number of seconds to wait for waiting a response back from the stats server
    –stats-host-id=UUID                 Set the Host ID used when submitting statistical info.
    –disable-cache                      Disable caching and cache checks for hash sums of scanned files.

(*) Default scan settings
(**) Certain files (e.g. documents, archives, etc.) may in turn contain other
   files inside. The above options ensure safe processing of this kind of data.