Today, I and my partners are going to configure a mail server on a Linux OS. And the following tasks need to be implemented.
1. A computer that pre-installed with Linux OS like fedora 9/10 or Ubuntu 8.10.
2. Install and configure Sendmail.
3. Install and configure Mail Scanner, Spamassassin and ClamAV.
4. Install and configure white/black list filter like DCC, Razor2 and Pyzor.
Task 1:
We will get a computer and format and install Linux OS into it, if did not get a pre-installed Linux OS computer. This is a quite easy task among the other so I not going to show the steps on how I achieve this task.
Task 2:
Sendmail is one of the free to use mail agent. Normally, this is optional software integrated with Linux OS. If looking for new version, following is the official download page:
Download Page: http://www.sendmail.org/releases
Installation and Operation Guide: http://www.sendmail.org/doc/sendmail-current/doc/op/op.pdf
Configuration ReadMe: http://www.sendmail.org/documentation/configurationReadme
Sample - /etc/resolv.conf:
domain esc.kbu.edu.my
nameserver 192.168.1.20
Please Note: An incorrectly configured resolv.conf file can lead to errors when running the m4 command to process the information in your sendmail.mc file.
Sample - /etc/hosts:
127.0.0.1 esc.kbu.edu.my localhost.localdomain localhost esc
Sample - /etc/mail/access:
localhost.localdomain RELAYlocalhost RELAY
127.0.0.1 RELAY
192.168.1.20 RELAY
esc.kbu.edu.my RELAY
Please Note: You'll then have to con
vert this text file into a Sendmail readable database file named /etc/mail/access.db. Here are the commands you need:
[root@esc.kbu.edu.my]# cd /etc/mail
[root@esc.kbu.edu.my]# make
Sample - /etc/mail/sendmail.mc:
Uncomment the following and edit the necessary information:
DAEMON_OPTIONS(‘Port=smtp, Name=MTA’)
DAEMON_OPTIONS(‘Port=submission, Name=MSA’)
FEATURE(`accept_unresolvable_domains')dnl
FEATURE(`masquerade_envelope')dnl
MASQUERADE_AS(`esc.kbu.edu.my')dnl
MASQUERADE_DOMAIN(`esc.kbu.edu.my')dnl
MASQUERADE_DOMAIN(localhost)dnl
MASQUERADE_DOMAIN(localhost.localdomain)dnl
Please Note: You'll then have to convert this text file into a Sendmail reada
ble configuration file named /etc/mail/sendmail.cf. Here are the commands you need:
[root@esc.kbu.edu.my]# m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf
Please Note: After all the editing, use the following command to restart the service
[root@esc.kbu.edu.my]# /etc/init.d/sendmail restart
Task 3:
First, we need to download the setup file that is combined with Spamassassin and ClamAV.
Download Page: http://www.mailscanner.info/downloads.html
Download Link: http://www.mailscanner.info/files/4/install-Clam-SA-latest.tar.gz
General Guide:
http://www.mailscanner.info/install_guides.html
Installation and Configuration Guide (For Ubuntu):
http://www.mailscanner.info/ubuntu.html
Installation and Configuration Guide (For Other Unix/Linux):
http://www.mailscanner.info/other.html
Sample - /etc/clamd.conf:
LogFile /var/lib/clamav/log/clamd.log
#LogFileUnlock
LogTime
LogSyslog
#PidFile
TemporaryDirectory /var/lib/clamav/tmp
DatabaseDirectory /var/lib/clamav/db
LocalSocket /var/lib/clamav/run/clamd.sock
FixStaleSocket
#TCPSocket
User Clamav
ScanPE
ScanOLE2
ScanMail
ScanHTML
#ScanArchive
ScanRAR
Sample - /etc/freshclam.conf:
Link: http://svn.pardus.org.tr/pardus/tags/2007.1/applications/security/clamav/files/freshclam.conf
Task 4:
A : DCC (Distributed Checksum Clearinghouse)
Download Page: http://www.dcc-servers.net/dcc/
Install
tar -zxvf dcc.tar.Z
cd dcc-1.3.92
./configure
make
make install
Configure
[root@esc.kbu.edu.my]# cd /etc/mail/spamassassin
[root@esc.kbu.edu.my]# vi v310.pre
Uncomment from
#loadplugin Mail::SpamAssassin::Plugin::DCC
To
loadplugin Mail::SpamAssassin::Plugin::DCC
Installation checking
[root@esc.kbu.edu.my]# cdcc info
Activate DCC function
[root@esc.kbu.edu.my]# cd /etc/mail/spamassassin
[root@esc.kbu.edu.my]# vi local.cf
Add the following into that configuration file:
use_dcc 1
dcc_home /var/dcc
[root@esc.kbu.edu.my]# cd /var/dcc
[root@esc.kbu.edu.my]# vi dcc_conf
Edit from
DCCIFD_ENABLE=off
To
DCCIFD_ENABLE=on
ln -s /var/dcc/libexec/rcDCC /etc/rc.d/init.d/DCC
chkconfig --add DCC
B: Pyzor
Download Page: http://pyzor.sourceforge.net/
Install
tar jxvf pyzor-0.4.0.tar.bz2
cd pyzor-0.4.0
python setup.py build
python setup.py install
chmod -R a+rX /usr/share/doc/pyzor \
/usr/lib/python2.5/site-packages/pyzor \
/usr/bin/pyzor /usr/bin/pyzord
Configure
Use the following command to download a folder named as servers from the pyzor server:
pyzor discover
Activate DCC function
[root@esc.kbu.edu.my]# cd /etc/mail/spamassassin
[root@esc.kbu.edu.my]# vi local.cf
Add the following into that configuration file:
use_pyzor 1
pyzor _options --homedir /etc/mail/spamassassin
Run the following command to download again the folder into the specified path:
pyzor --homedir /etc/mail/spamassassin discover
C: Razor2
Download Page: http://razor.sourceforge.net/
We need both razor-agents-2.84 and razor-agents-sdk.
Install razor-agents-2.84
tar -vxf razor-agents-2.84.tar.bz2
cd razor-agents-2.84
perl Makefile.PL
make
make test
make install
Install razor-agents-sdk
tar -vxf razor-agents-sdk-2.07.tar.bz2
cd razor-agents-sdk-2.07
perl Makefile.PL
make
make test
make install
razor-client
razor-admin –create
razor-admin -register -user=user@XXX.XXX -pass= xxxx
Activate DCC function
[root@esc.kbu.edu.my]# cd /etc/mail/spamassassin
[root@esc.kbu.edu.my]# vi local.cf
Add the following into that configuration file:
use_razor2 1
Checking
Use the following command to check whether the Razor2 working or not. If working, “razor2 is available” this sentence will be appear.
[root@esc.kbu.edu.my]# spamassassin -t -D razor2 < /usr/share/doc/spamassassin-3.2.5/sample-spam.txt
