十五、安装clamav-0.91.2

最新的clamav-0.91.2需要zlib-1.2.2以上的版本的支持,而RHEL4上的版本为zlib-1.2.1,因此您需要先升级zlib

1、安装zlib-1.2.3

#tar zvxf zlib-1.2.3.tar.gz
#cd zlib-1.2.3
#./configure --prefix=/usr --shared
#make
#make test

2、安装clamav-0.91.2

添加ClamAV运行所需的组和用户:
#groupadd clamav
#useradd -g clamav -s /sbin/nologin -M clamav

添加配合amavisd-new使用的用户amavis
#groupadd amavis
#useradd -g amavis -s /sbin/nologin -M amavis

#tar zxvf clamav-0.91.2.tar.gz
#cd clamav-0.91.2
#./configure --prefix=/usr/local/clamav --with-dbdir=/usr/local/clamav/share --sysconfdir=/etc/clamav
#make
#make check
#make install

3、配置Clam AntiVirus:

编辑主配置文件:
#vi /etc/clamav/clamd.conf

注释掉第八行的Example,如下:
# Example

找到如下行
#LogFile /tmp/clamd.log
#PidFile /var/run/clamd.pid
LocalSocket /tmp/clamd.socket
#DatabaseDirectory /var/lib/clamav
#User clamav
修改为:
LogFile /var/log/clamav/clamd.log
PidFile /var/run/clamav/clamd.pid
LocalSocket /var/run/clamav/clamd.socket
DatabaseDirectory /usr/local/clamav/share
User amavis

启用以下选项
LogSyslog yes
LogFacility LOG_MAIL
LogVerbose yes
StreamMaxLength 20M  (后面的数值应该与邮件服务器允许的最大附件值相一致)


编辑更新进程的配置文件
#vi /etc/clamav/freshclam.conf

注释掉Example,如下:
# Example

找到如下行
#DatabaseDirectory /var/lib/clamav
#UpdateLogFile /var/log/freshclam.log
PidFile /var/run/freshclam.pid
分别修改为:
DatabaseDirectory /usr/local/clamav/share
UpdateLogFile /var/log/clamav/freshclam.log
PidFile /var/run/clamav/freshclam.pid

启用以下选项:
DatabaseMirror db.XY.clamav.net  (这里也可以把XY改成您的国家代码来实现,比如,我们用cn来代替)
LogSyslog yes
LogFacility LOG_MAIL
LogVerbose yes

4、建立日志所在的目录、进程与socket所在的目录,并让它属于clamav用户:

# mkdir -v /var/log/clamav
# chown -R amavis.amavis /var/log/clamav
# mkdir -v /var/run/clamav
# chmod 700 /var/run/clamav
# chown -R amavis.amavis /var/run/clamav

建立freshlog的日志文件
#touch  /var/log/clamav/freshclam.log
#chown  clamav.clamav  /var/log/clamav/freshclam.log

5、配置crontab,让Clam AntiVirus每小时检测一次新的病毒库:

# crontab -e
添加:
37 * * * * /usr/local/clamav/bin/freshclam

6、配置库文件搜索路径:

# echo “/usr/local/clamav/lib” >> /etc/ls.so.conf
# ldconfig -v

7、配置clamav开机自动启动

# cp contrib/init/RedHat/clamd  /etc/rc.d/init.d/clamd
# cp contrib/init/RedHat/clamav-milter  /etc/rc.d/init.d/clamav-milter
# chkconfig --add clamd
# chkconfig --add clamav-milter
# chkconfig --level 2345 clamd on
# chkconfig --level 2345 clamav-milter on

编辑/etc/rc.d/init.d/clamd,将服务进程的路径指向刚才的安装目录
#vi /etc/rc.d/init.d/clamd
找到如下行
progdir="/usr/local/sbin"
修改为:
progdir="/usr/local/clamav/sbin"

启动clamd
#service clamd start

十六、安装Spamassassin-3.2.3    (2007.9.19新增)

1、依赖关系的解决,安装Spamassassin需要很多perl模块的支持,以下是所需模块列表及安装方法;

必须的软件包:
Digest::SHA1
HTML::Parser
Net::DNS
LWP (aka libwww-perl)
HTTP::Date
IO::Zlib
Archive::Tar

可选的软件包,其中有些后面的amavisd也有可能会用到:
MIME::Base64
DB_File
Net::SMTP
Mail::SPF
IP::Country::Fast
Net::Ident
IO::Socket::INET6
IO::Socket::SSL
Compress::Zlib
Time::HiRes
Mail::DKIM
Mail::DomainKeys
DBI *and* DBD driver/modules
Encode::Detect
Apache::Test
Razor2

推荐使用CPAN自动安装(你的主机要能连上Internet),它能够自动下载安装,并能解决安装过程中的依赖关系。您可以使用类同的以下的命令来进行安装:
#perl -MCPAN -e shell
cpan> install Digest::SHA1
………………

如果您的主机无法直接连接到Internet,您也可以到http://search.cpan.org上搜索下载所需要的软件包,而后使用类同的下列命令安装:

#tar zxvf 软件包.tar.gz
#cd 软件包
#perl Makefile.PL
#make
#make test
#make install
说明:某些软件包安装的过程中可能需要已经列出的其它软件包的支持(可以先尝试安装Spamassassin,然后按提示补充所需软件包),请安照提示自行调整安装顺序。另外,其中有个软件包安装过程中可能要求声明环境变量LC_ALL,此时,可输入如下命令,并重新进行软件包的编译安装即可。
#export LC_ALL=C

2、安装Spamassassin-3.2.3

#tar jxvf Mail-SpamAssassin-3.2.3.tar.bz2
#cd Mail-SpamAssassin-3.2.3
#perl Makefile.PL
#make
#make check
#make istall

3、编辑主配置文件/etc/mail/spamassassin/local.cf

required_hits 10.0
rewrite_subject 1 
required_score 5.0
rewrite_header Subject *****SPAM*****
report_safe     1
use_bayes       1
bayes_auto_learn        1
skip_rbl_checks         1
use_razor2      0
use_pyzor       0
ok_locales      all


4、测试spamassassin 

#spamassassin -t < sample-nonspam.txt > nonspam.out
#spamassassin -t < sample-spam.txt > spam.out 

查看测试结果:

#less nonspam.out
#less spam.out 

5、检查配置文件

#spamassassin -d --lint 

6、启动进程,并将其加入到自动启动队列

#/usr/bin/spamd -d 
#echo "/usr/bin/spamd -d" >> /etc/rc.local

十七、安装amavisd-new-2.5.2

1、依赖关系的解决

以下为官方声明所必须的软件包列表,你可以采用类同安装Spamassassin一节中的perl模块的安装方法进行安装

Archive::Zip   (Archive-Zip-x.xx) (1.14 or later should be used!)
Compress::Zlib (Compress-Zlib-x.xx) (1.35 or later)
Convert::TNEF  (Convert-TNEF-x.xx)
Convert::UUlib (Convert-UUlib-x.xxx) (1.08 or later, stick to new versions!)
MIME::Base64   (MIME-Base64-x.xx)
MIME::Parser   (MIME-Tools-x.xxxx) (latest version from CPAN - currently 5.420)
Mail::Internet (MailTools-1.58 or later have workarounds for Perl 5.8.0 bugs)
Net::Server    (Net-Server-x.xx) (version 0.88 finally does setuid right)
Digest::MD5    (Digest-MD5-x.xx) (2.22 or later)
IO::Stringy    (IO-stringy-x.xxx)
Time::HiRes    (Time-HiRes-x.xx) (use 1.49 or later, older can cause problems)
Unix::Syslog   (Unix-Syslog-x.xxx)
BerkeleyDB     with bdb library 3.2 or later (4.2 or later preferred)

2、安装amavisd-new-2.5.2

创建运行时目录,并赋予amavis用户(前文中所建)
# mkdir -pv /var/amavis/{tmp,var,db,home}
# chown -R amavis:amavis /var/amavis
#chmod -R 750 /var/amavis

#tar zxvf amavisd-new-2.5.2.tar.gz
#cd amavisd-new-2.5.2

拷贝服务端至$PATH中指定的目录,推荐拷贝至/usr/local/sbin:
#cp amavisd /usr/local/sbin/
#chown root /usr/local/sbin/amavisd
#chmod 755  /usr/local/sbin/amavisd

拷贝主配置文件至/etc,并修改相应的权限:
#cp amavisd.conf /etc
# chown root:amavis /etc/amavisd.conf 
# chmod 640 /etc/amavisd.conf 

创建amavisd运行中所需要的隔离区域:
# mkdir -v /var/virusmails
# chown amavis:amavis /var/virusmails/
# chmod 750 /var/virusmails/

3、编辑主配置文件
#vi /etc/amavisd.conf

确保您的如下选项的值如下文所示:
$daemon_user  = 'amavis';
$daemon_group = 'amavis'; 
$mydomain = 'benet.org'; (此处可更改为您集体的域)

$virus_admin               = "postmaster\@$mydomain";  
$mailfrom_notify_admin     = "postmaster\@$mydomain";  
$mailfrom_notify_recip     = "postmaster\@$mydomain";  
$mailfrom_notify_spamadmin = "postmaster\@$mydomain"; 
$mailfrom_to_quarantine = ''; 

virus_admin_maps => ["postmaster\@$mydomain"]    (指定报告病毒和垃圾邮件时发送系统邮件的用户身份)
spam_admin_maps  => ["postmaster\@$mydomain"]

启用ClamAV,(大概在第355行)去掉如下行前的注释符: 
#['ClamAV-clamd',
#     \&ask_daemon, ["CONTSCAN {}\n", "/var/run/clamav/clamd"],
#    qr/\bOK$/, qr/\bFOUND$/,
#      qr/^.*?: (?!Infected Archive)(.*) FOUND$/ ],
#     ['Mail::ClamAV', \&ask_clamav, "*", [0], [1], qr/^INFECTED: (.+)/],

并将如上行中的/var/run/clamav/clamd修改为:/var/run/clamav/clamd.socket