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The Perfect Server – CentOS 5.2


This tutorial shows how to set up a CentOS 5.2 server that offers all services needed by ISPs and web hosters: Apache web server (SSL-capable), Postfix mail server with SMTP-AUTH and TLS, BIND DNS server, Proftpd FTP server, MySQL server, Dovecot POP3/IMAP, Quota, Firewall, etc. This tutorial is written for the 32-bit version of CentOS 5.2, but should apply to the 64-bit version with very little modifications as well.

I will use the following software:

  • Web Server: Apache 2.2 with PHP 5.1.6
  • Database Server: MySQL 5.0
  • Mail Server: Postfix
  • DNS Server: BIND9 (chrooted)
  • FTP Server: Proftpd
  • POP3/IMAP server: Dovecot
  • Webalizer for web site statistics

In the end you should have a system that works reliably, and if you like you can install the free webhosting control panel ISPConfig (i.e., ISPConfig runs on it out of the box).

I want to say first that this is not the only way of setting up such a system. There are many ways of achieving this goal but this is the way I take. I do not issue any guarantee that this will work for you!

 

1 Requirements

To install such a system you will need the following:

  • Download the CentOS 5.2 DVD or the six CentOS 5.2 CDs from a mirror next to you (the list of mirrors can be found here: http://isoredirect.centos.org/centos/5/isos/i386/).
  • a fast internet connection.

 

2 Preliminary Note

In this tutorial I use the hostname server1.example.com with the IP address 192.168.0.100 and the gateway 192.168.0.1. These settings might differ for you, so you have to replace them where appropriate.

 

3 Install The Base System

Boot from your first CentOS 5.2 CD (CD 1) or the CentOS 5.2 DVD. Press <ENTER> at the boot prompt:

1

It can take a long time to test the installation media so we skip this test here:

2

The welcome screen of the CentOS installer appears. Click on Next:

3

Choose your language next:

4

Select your keyboard layout:

5

I’m installing CentOS 5.2 on a fresh system, so I answer Yes to the question Would you like to initialize this drive, erasing ALL DATA?

6

Now we must select a partitioning scheme for our installation. For simplicity’s sake I select Remove linux partitions on selected drives and create default layout. This will result in a small /boot and a large / partition as well as a swap partition. Of course, you’re free to partition your hard drive however you like it. Then I hit Next:

7

Answer the following question (Are you sure you want to do this?) with Yes:

8

On to the network settings. The default setting here is to configure the network interfaces with DHCP, but we are installing a server, so static IP addresses are not a bad idea… Click on the Edit button at the top right.

9

In the window that pops up uncheck Use dynamic IP configuration (DHCP) and Enable IPv6 support and give your network card a static IP address (in this tutorial I’m using the IP address 192.168.0.100 for demonstration purposes) and a suitable netmask (e.g. 255.255.255.0; if you are not sure about the right values, http://www.subnetmask.info might help you):

10

Set the hostname manually, e.g. server1.example.com, and enter a gateway (e.g. 192.168.0.1) and up to two DNS servers (e.g. 213.191.92.86 and 145.253.2.75):

11

Choose your time zone:

12

Give root a password:

13

Now we select the software we want to install. Select nothing but Server (uncheck everything else). Also don’t check Packages from CentOS Extras. Then check Customize now, and click on Next:

14

Now we must select the package groups we want to install. Select Editors, Text-based Internet, Development Libraries, Development Tools, DNS Name Server, FTP Server, Mail Server, MySQL Database, Server Configuration Tools, Web Server, Administration Tools, Base, and System Tools (unselect all other package groups) and click on Next:

15

The installer checks the dependencies of the selected packages:

16

Click on Next to start the installation:

17

The hard drive is being formatted:

18

The installation begins. This will take a few minutes:

19

Finally, the installation is complete, and you can remove your CD or DVD from the computer and reboot it:

20

After the reboot, you will see this screen. Select Firewall configuration and hit Run Tool:

21

I want to install ISPConfig at the end of this tutorial which comes with its own firewall. That’s why I disable the default CentOS firewall now. Of course, you are free to leave it on and configure it to your needs (but then you shouldn’t use any other firewall later on as it will most probably interfere with the CentOS firewall).

SELinux is a security extension of CentOS that should provide extended security. In my opinion you don’t need it to configure a secure system, and it usually causes more problems than advantages (think of it after you have done a week of trouble-shooting because some service wasn’t working as expected, and then you find out that everything was ok, only SELinux was causing the problem). Therefore I disable it, too (this is a must if you want to install ISPConfig later on). Hit OK afterwards:

22

Then leave the Setup Agent by selecting Exit:

23

Then log in as root and reboot the system so that your changes can be applied:

reboot

Now, on to the configuration…

4 Adjust /etc/hosts

Next we edit /etc/hosts. Make it look like this:

vi /etc/hosts

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1               localhost.localdomain localhost
192.168.0.100           server1.example.com server1
::1             localhost6.localdomain6 localhost6

 

5 Configure Additional IP Addresses

(This section is totally optional. It just shows how to add additional IP addresses to your network interface eth0 if you need more than one IP address. If you’re fine with one IP address, you can skip this section.)

Let’s assume our network interface is eth0. Then there is a file /etc/sysconfig/network-scripts/ifcfg-eth0 which contains the settings for eth0. We can use this as a sample for our new virtual network interface eth0:0:

cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:0

Now we want to use the IP address 192.168.0.101 on the virtual interface eth0:0. Therefore we open the file /etc/sysconfig/network-scripts/ifcfg-eth0:0 and modify it as follows (we can leave out the HWADDR line as it is the same physical network card):

vi /etc/sysconfig/network-scripts/ifcfg-eth0:0

# Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]
DEVICE=eth0:0
BOOTPROTO=static
BROADCAST=192.168.0.255
IPADDR=192.168.0.101
NETMASK=255.255.255.0
NETWORK=192.168.0.0
ONBOOT=yes

Afterwards we have to restart the network:

/etc/init.d/network restart

You might also want to adjust /etc/hosts after you have added new IP addresses, although this is not necessary.

Now run

ifconfig

You should now see your new IP address in the output:

[root@server1 ~]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:29:B1:97:E1
inet addr:192.168.0.100  Bcast:192.168.0.255  Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:feb1:97e1/64 Scope:Link
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:310 errors:0 dropped:0 overruns:0 frame:0
TX packets:337 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:28475 (27.8 KiB)  TX bytes:72116 (70.4 KiB)
Interrupt:177 Base address:0x1400

eth0:0    Link encap:Ethernet  HWaddr 00:0C:29:B1:97:E1
inet addr:192.168.0.101  Bcast:192.168.0.255  Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
Interrupt:177 Base address:0x1400

lo        Link encap:Local Loopback
inet addr:127.0.0.1  Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING  MTU:16436  Metric:1
RX packets:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:560 (560.0 b)  TX bytes:560 (560.0 b)

[root@server1 ~]#

 

6 Disable The Firewall And SELinux

(You can skip this chapter if you have already disabled the firewall and SELinux at the end of the basic system installation (in the Setup Agent).)

I want to install ISPConfig at the end of this tutorial which comes with its own firewall. That’s why I disable the default CentOS firewall now. Of course, you are free to leave it on and configure it to your needs (but then you shouldn’t use any other firewall later on as it will most probably interfere with the CentOS firewall).

SELinux is a security extension of CentOS that should provide extended security. In my opinion you don’t need it to configure a secure system, and it usually causes more problems than advantages (think of it after you have done a week of trouble-shooting because some service wasn’t working as expected, and then you find out that everything was ok, only SELinux was causing the problem). Therefore I disable it, too (this is a must if you want to install ISPConfig later on).

Run

system-config-securitylevel

Set both Security Level and SELinux to Disabled and hit OK:

24

Afterwards we must reboot the system:

reboot

 

7 Install Some Software

First we import the GPG keys for software packages:

rpm –import /etc/pki/rpm-gpg/RPM-GPG-KEY*

Then we update our existing packages on the system:

yum update

Now we install some software packages that are needed later on:

yum groupinstall ‘Development Tools’

yum groupinstall ‘Development Libraries’

 

8 Quota

(If you have chosen a different partitioning scheme than I did, you must adjust this chapter so that quota applies to the partitions where you need it.)

To install quota, we run this command:

yum install quota

Edit /etc/fstab and add ,usrquota,grpquota to the / partition (/dev/VolGroup00/LogVol00):

vi /etc/fstab

/dev/VolGroup00/LogVol00 /                       ext3    defaults,usrquota,grpquota        1 1
LABEL=/boot             /boot                   ext3    defaults        1 2
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
/dev/VolGroup00/LogVol01 swap                    swap    defaults        0 0

Then run

touch /aquota.user /aquota.group
chmod 600 /aquota.*
mount -o remount /
quotacheck -avugm
quotaon -avug

to enable quota.

 

9 Install Apache, MySQL, phpMyAdmin

First we enable the RPMforge repository on our CentOS system as lots of the packages that we are going to install in the course of this tutorial are not available in the official CentOS 5.2 repositories:

rpm –import http://dag.wieers.com/rpm/packages/RPM-GPG-KEY.dag.txt

cd /tmp
wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.3.6-1.el5.rf.i386.rpm
rpm -ivh rpmforge-release-0.3.6-1.el5.rf.i386.rpm

(If the above link doesn’t work anymore, you can find the current version of rpmforge-release here: http://dag.wieers.com/rpm/packages/rpmforge-release/)

Afterwards we can install the needed packages with one single command (including the packages we need to build Courier-IMAP):

yum install ntp httpd mysql-server php php-mysql php-mbstring php-mcrypt phpmyadmin rpm-build gcc mysql-devel openssl-devel cyrus-sasl-devel pkgconfig zlib-devel pcre-devel openldap-devel postgresql-devel expect libtool-ltdl-devel openldap-servers libtool gdbm-devel pam-devel gamin-devel

10 Install Courier-IMAP, Courier-Authlib, And Maildrop

Unfortunately there are no rpm packages for Courier-IMAP, Courier-Authlib, and Maildrop, therefore we have to build them ourselves.

RPM packages should not be built as root; courier-imap will even refuse to compile if it detects that the compilation is run as the root user. Therefore we create a normal user account now (compileuser in this example) and give him a password:

useradd -m -s /bin/bash compileuser
passwd compileuser

We will need the sudo command later on so that the user compileuser can compile and install the rpm packages. But first, we must allow compileuser to run all commands using sudo:

Run

visudo

In the file that opens there’s a line root ALL=(ALL) ALL. Add a similar line for compileuser just below that line:

[...]
root    ALL=(ALL)       ALL
compileuser   ALL=(ALL)       ALL
[...]

Now we are ready to build our rpm package. First become the user compileuser:

su compileuser

Next we create our build environment:

mkdir $HOME/rpm
mkdir $HOME/rpm/SOURCES
mkdir $HOME/rpm/SPECS
mkdir $HOME/rpm/BUILD
mkdir $HOME/rpm/SRPMS
mkdir $HOME/rpm/RPMS
mkdir $HOME/rpm/RPMS/i386

echo “%_topdir $HOME/rpm” >> $HOME/.rpmmacros

Now we download the source files from http://www.courier-mta.org/download.php:

cd /tmp
wget http://prdownloads.sourceforge.net/courier/courier-authlib-0.62.1.tar.bz2
wget http://prdownloads.sourceforge.net/courier/courier-imap-4.4.1.tar.bz2
wget http://prdownloads.sourceforge.net/courier/maildrop-2.0.4.tar.bz2

Now (still in /tmp) we can build courier-authlib:

sudo rpmbuild -ta courier-authlib-0.62.1.tar.bz2

After the build process, the rpm packages can be found in $HOME/rpm/RPMS/i386 ($HOME/rpm/RPMS/x86_64 if you are on an x86_64 system):

cd $HOME/rpm/RPMS/i386

The command

ls -l

shows you the available rpm packages:

[compileuser@server1 i386]$ ls -l
total 584
-rw-r–r– 1 root root 140978 Feb 26 03:00 courier-authlib-0.62.1-1.i386.rpm
-rw-r–r– 1 root root 309196 Feb 26 03:00 courier-authlib-debuginfo-0.62.1-1.i386.rpm
-rw-r–r– 1 root root  34672 Feb 26 03:00 courier-authlib-devel-0.62.1-1.i386.rpm
-rw-r–r– 1 root root  17855 Feb 26 03:00 courier-authlib-ldap-0.62.1-1.i386.rpm
-rw-r–r– 1 root root  14048 Feb 26 03:00 courier-authlib-mysql-0.62.1-1.i386.rpm
-rw-r–r– 1 root root  13214 Feb 26 03:00 courier-authlib-pgsql-0.62.1-1.i386.rpm
-rw-r–r– 1 root root   8175 Feb 26 03:00 courier-authlib-pipe-0.62.1-1.i386.rpm
-rw-r–r– 1 root root  35927 Feb 26 03:00 courier-authlib-userdb-0.62.1-1.i386.rpm
[compileuser@server1 i386]$

Select the ones you want to install, and install them like this:

sudo rpm -ivh courier-authlib-0.62.1-1.i386.rpm courier-authlib-mysql-0.62.1-1.i386.rpm courier-authlib-devel-0.62.1-1.i386.rpm

Now we go back to the /tmp directory and run rpmbuild again, this time without sudo, otherwise the compilation will fail because it was run as root:

cd /tmp
rpmbuild -ta courier-imap-4.4.1.tar.bz2

After the build process, the rpm packages can be found in $HOME/rpm/RPMS/i386 ($HOME/rpm/RPMS/x86_64 if you are on an x86_64 system):

cd $HOME/rpm/RPMS/i386

The command

ls -l

shows you the available rpm packages:

[compileuser@server1 i386]$ ls -l
total 1868
-rw-r–r– 1 root        root        140978 Feb 26 03:00 courier-authlib-0.62.1-1.i386.rpm
-rw-r–r– 1 root        root        309196 Feb 26 03:00 courier-authlib-debuginfo-0.62.1-1.i386.rpm
-rw-r–r– 1 root        root         34672 Feb 26 03:00 courier-authlib-devel-0.62.1-1.i386.rpm
-rw-r–r– 1 root        root         17855 Feb 26 03:00 courier-authlib-ldap-0.62.1-1.i386.rpm
-rw-r–r– 1 root        root         14048 Feb 26 03:00 courier-authlib-mysql-0.62.1-1.i386.rpm
-rw-r–r– 1 root        root         13214 Feb 26 03:00 courier-authlib-pgsql-0.62.1-1.i386.rpm
-rw-r–r– 1 root        root          8175 Feb 26 03:00 courier-authlib-pipe-0.62.1-1.i386.rpm
-rw-r–r– 1 root        root         35927 Feb 26 03:00 courier-authlib-userdb-0.62.1-1.i386.rpm
-rw-rw-r– 1 compileuser compileuser 395137 Feb 26 03:13 courier-imap-4.4.1-1.i386.rpm
-rw-rw-r– 1 compileuser compileuser 906775 Feb 26 03:13 courier-imap-debuginfo-4.4.1-1.i386.rpm
[compileuser@server1 i386]$

You can install courier-imap like this:

sudo rpm -ivh courier-imap-4.4.1-1.i386.rpm

Now we go back to the /tmp directory and run rpmbuild again, this time to build a maildrop package:

cd /tmp
sudo rpmbuild -ta maildrop-2.0.4.tar.bz2

After the build process, the rpm packages can be found in $HOME/rpm/RPMS/i386 ($HOME/rpm/RPMS/x86_64 if you are on an x86_64 system):

cd $HOME/rpm/RPMS/i386

The command

ls -l

shows you the available rpm packages:

[compileuser@server1 i386]$ ls -l
total 3096
-rw-r–r– 1 root        root        140978 Feb 26 03:00 courier-authlib-0.62.1-1.i386.rpm
-rw-r–r– 1 root        root        309196 Feb 26 03:00 courier-authlib-debuginfo-0.62.1-1.i386.rpm
-rw-r–r– 1 root        root         34672 Feb 26 03:00 courier-authlib-devel-0.62.1-1.i386.rpm
-rw-r–r– 1 root        root         17855 Feb 26 03:00 courier-authlib-ldap-0.62.1-1.i386.rpm
-rw-r–r– 1 root        root         14048 Feb 26 03:00 courier-authlib-mysql-0.62.1-1.i386.rpm
-rw-r–r– 1 root        root         13214 Feb 26 03:00 courier-authlib-pgsql-0.62.1-1.i386.rpm
-rw-r–r– 1 root        root          8175 Feb 26 03:00 courier-authlib-pipe-0.62.1-1.i386.rpm
-rw-r–r– 1 root        root         35927 Feb 26 03:00 courier-authlib-userdb-0.62.1-1.i386.rpm
-rw-rw-r– 1 compileuser compileuser 395137 Feb 26 03:13 courier-imap-4.4.1-1.i386.rpm
-rw-rw-r– 1 compileuser compileuser 906775 Feb 26 03:13 courier-imap-debuginfo-4.4.1-1.i386.rpm
-rw-r–r– 1 root        root        303104 Feb 26 03:25 maildrop-2.0.4-1.i386.rpm
-rw-r–r– 1 root        root        739326 Feb 26 03:25 maildrop-debuginfo-2.0.4-1.i386.rpm
-rw-r–r– 1 root        root        134387 Feb 26 03:25 maildrop-devel-2.0.4-1.i386.rpm
-rw-r–r– 1 root        root         58837 Feb 26 03:25 maildrop-man-2.0.4-1.i386.rpm
[compileuser@server1 i386]$

You can now install maildrop like this:

sudo rpm -ivh maildrop-2.0.4-1.i386.rpm

After you have compiled and installed all needed packages, you can become root again by typing

exit

 

11 Apply Quota Patch To Postfix

We have to get the Postfix source rpm, patch it with the quota patch, build a new Postfix rpm package and install it.

cd /usr/src
wget http://ftp-stud.fht-esslingen.de/pub/Mirrors/centos/5.2/os/SRPMS/postfix-2.3.3-2.src.rpm
rpm -ivh postfix-2.3.3-2.src.rpm

The last command will show some warnings that you can ignore:

warning: user mockbuild does not exist – using root
warning: group mockbuild does not exist – using root

cd /usr/src/redhat/SOURCES
wget http://vda.sourceforge.net/VDA/postfix-2.3.3-vda.patch.gz
gunzip postfix-2.3.3-vda.patch.gz
cd /usr/src/redhat/SPECS/

Now we must edit the file postfix.spec:

vi postfix.spec

Change %define MYSQL 0 to %define MYSQL 1, add Patch0: postfix-2.3.3-vda.patch to the # Patches stanza, and finally add %patch0 -p1 -b .vda to the %setup -q stanza:

[...]
%define MYSQL 1
[...]
# Patches

Patch0: postfix-2.3.3-vda.patch
Patch1: postfix-2.1.1-config.patch
Patch3: postfix-alternatives.patch
Patch6: postfix-2.1.1-obsolete.patch
Patch7: postfix-2.1.5-aliases.patch
Patch8: postfix-large-fs.patch
Patch9: postfix-2.2.5-cyrus.patch
[...]
%setup -q
# Apply obligatory patches
%patch0 -p1 -b .vda
%patch1 -p1 -b .config
%patch3 -p1 -b .alternatives
%patch6 -p1 -b .obsolete
%patch7 -p1 -b .aliases
%patch8 -p1 -b .large-fs
%patch9 -p1 -b .cyrus
[...]

Then we build our new Postfix rpm package with quota and MySQL support:

rpmbuild -ba postfix.spec

Our Postfix rpm package is created in /usr/src/redhat/RPMS/i386 (/usr/src/redhat/RPMS/x86_64 if you are on an x86_64 system), so we go there:

cd /usr/src/redhat/RPMS/i386

The command

ls -l

shows you the available packages:

[root@server1 i386]# ls -l
total 11292
-rw-r–r– 1 root root 3820393 Feb 27 18:16 postfix-2.3.3-2.i386.rpm
-rw-r–r– 1 root root 7666204 Feb 27 18:16 postfix-debuginfo-2.3.3-2.i386.rpm
-rw-r–r– 1 root root   50539 Feb 27 18:16 postfix-pflogsumm-2.3.3-2.i386.rpm
[root@server1 i386]#

Pick the Postfix package and install it like this:

rpm -ivh postfix-2.3.3-2.i386.rpm

Then turn off Sendmail and start Postfix, saslauthd, and courier-authlib:

chkconfig –levels 235 courier-authlib on
/etc/init.d/courier-authlib start

chkconfig –levels 235 sendmail off
chkconfig –levels 235 postfix on
chkconfig –levels 235 saslauthd on
/etc/init.d/sendmail stop
/etc/init.d/postfix start
/etc/init.d/saslauthd start

 

12 Configure Courier

Now we create the system startup links for courier-imap:

chkconfig –levels 235 courier-imap on
/etc/init.d/courier-authlib restart
/etc/init.d/courier-imap restart

When courier-imap is started for the first time, it automatically creates the certificate files /usr/lib/courier-imap/share/imapd.pem and /usr/lib/courier-imap/share/pop3d.pem from the /usr/lib/courier-imap/etc/imapd.cnf and /usr/lib/courier-imap/etc/pop3d.cnf files. Because the .cnf files contain the line CN=localhost, but our server is named server1.example.com, the certificates might cause problems when you use TLS connections. To solve this, we delete both certificates…

cd /usr/lib/courier-imap/share/
rm -f imapd.pem
rm -f pop3d.pem

… and replace the CN=localhost lines in /usr/lib/courier-imap/etc/imapd.cnf and /usr/lib/courier-imap/etc/pop3d.cnf with CN=server1.example.com:

vi /usr/lib/courier-imap/etc/imapd.cnf

[...]
CN=server1.example.com
[...]

vi /usr/lib/courier-imap/etc/pop3d.cnf

[...]
CN=server1.example.com
[...]

Then we recreate both certificates…

./mkimapdcert
./mkpop3dcert

… and restart courier-authlib and courier-imap:

/etc/init.d/courier-authlib restart
/etc/init.d/courier-imap restart

 

13 Install Getmail

Getmail can be installed as follows:

yum install getmail

14 Set MySQL Passwords And Configure phpMyAdmin

Start MySQL:

chkconfig –levels 235 mysqld on
/etc/init.d/mysqld start

Then set passwords for the MySQL root account:

mysqladmin -u root password yourrootsqlpassword
mysqladmin -h server1.example.com -u root password yourrootsqlpassword

Now we configure phpMyAdmin. We change the Apache configuration so that phpMyAdmin allows connections not just from localhost (by commenting out the <Directory “/usr/share/phpmyadmin”> stanza):

vi /etc/httpd/conf.d/phpmyadmin.conf

#
#  Web application to manage MySQL
#

#<Directory "/usr/share/phpmyadmin">
#  Order Deny,Allow
#  Deny from all
#  Allow from 127.0.0.1
#</Directory>

Alias /phpmyadmin /usr/share/phpmyadmin
Alias /phpMyAdmin /usr/share/phpmyadmin
Alias /mysqladmin /usr/share/phpmyadmin

Next we change the authentication in phpMyAdmin from cookie to http:

vi /usr/share/phpmyadmin/config.inc.php

[...]
/* Authentication type */
$cfg['Servers'][$i]['auth_type'] = 'http';
[...]

Then we create the system startup links for Apache and start it:

chkconfig –levels 235 httpd on
/etc/init.d/httpd start

Now you can direct your browser to http://server1.example.com/phpmyadmin/ or http://192.168.0.100/phpmyadmin/ and log in with the user name root and your new root MySQL password.

 

15 Install Amavisd-new, SpamAssassin And ClamAV

To install amavisd-new, spamassassin and clamav, run the following command:

yum install amavisd-new spamassassin clamav clamd unzip bzip2 unrar perl-DBD-mysql

Then we start freshclam, amavisd, and clamd…

chkconfig –levels 235 amavisd on
chkconfig –levels 235 clamd on
/usr/bin/freshclam
/etc/init.d/amavisd start
/etc/init.d/clamd start

… and create some necessary directories:

mkdir /var/run/amavisd /var/spool/amavisd /var/spool/amavisd/tmp /var/spool/amavisd/db
chown amavis /var/run/amavisd /var/spool/amavisd /var/spool/amavisd/tmp /var/spool/amavisd/db

 

16 Installing Apache2 With mod_php, mod_fcgi/PHP5, And suPHP

ISPConfig 3 allows you to use mod_php, mod_fcgi/PHP5, cgi/PHP5, and suPHP on a per website basis.

mod_fcgid is not available in the official CentOS repositories, but there’s a package for CentOS 5.x in the centos.karan.org testing repository. We enable the repository as follows:

cd /etc/yum.repos.d/
wget http://centos.karan.org/kbsingh-CentOS-Extras.repo

Next we open /etc/yum.repos.d/kbsingh-CentOS-Extras.repo

vi /etc/yum.repos.d/kbsingh-CentOS-Extras.repo

… and set gpgcheck to 0 and enabled to 1 in the [kbs-CentOS-Testing] section:

[...]
[kbs-CentOS-Testing]
name=CentOS.Karan.Org-EL$releasever - Testing
gpgcheck=0
gpgkey=http://centos.karan.org/RPM-GPG-KEY-karan.org.txt
enabled=1
baseurl=http://centos.karan.org/el$releasever/extras/testing/$basearch/RPMS/

Afterwards we can install Apache2with mod_php5, mod_fcgid, and PHP5:

yum install php php-devel php-gd php-imap php-ldap php-mysql php-odbc php-pear php-xml php-xmlrpc php-eaccelerator php-mbstring php-mcrypt php-mhash php-mssql php-snmp php-soap php-tidy curl curl-devel perl-libwww-perl ImageMagick libxml2 libxml2-devel mod_fcgid php-cli httpd-devel

Next we open /etc/php.ini

vi /etc/php.ini

… and change the error reporting (so that notices aren’t shown any longer) and add cgi.fix_pathinfo = 1 at the end of the file:

[...]
;error_reporting  =  E_ALL
error_reporting = E_ALL & ~E_NOTICE
[...]
cgi.fix_pathinfo = 1

Next we install suPHP:

cd /tmp
wget http://www.suphp.org/download/suphp-0.7.0.tar.gz
tar xvfz suphp-0.7.0.tar.gz
cd suphp-0.7.0/
./configure –prefix=/usr –sysconfdir=/etc –with-apr=/usr/bin/apr-1-config –with-apxs=/usr/sbin/apxs –with-apache-user=apache –with-setid-mode=owner –with-php=/usr/bin/php-cgi –with-logfile=/var/log/httpd/suphp_log –enable-SUPHP_USE_USERGROUP=yes
make
make install

Then we add the suPHP module to our Apache configuration…

vi /etc/httpd/conf.d/suphp.conf

LoadModule suphp_module modules/mod_suphp.so

… and create the file /etc/suphp.conf as follows:

vi /etc/suphp.conf

[global]
;Path to logfile
logfile=/var/log/httpd/suphp.log

;Loglevel
loglevel=info

;User Apache is running as
webserver_user=apache

;Path all scripts have to be in
docroot=/

;Path to chroot() to before executing script
;chroot=/mychroot

; Security options
allow_file_group_writeable=true
allow_file_others_writeable=false
allow_directory_group_writeable=true
allow_directory_others_writeable=false

;Check wheter script is within DOCUMENT_ROOT
check_vhost_docroot=true

;Send minor error messages to browser
errors_to_browser=false

;PATH environment variable
env_path=/bin:/usr/bin

;Umask to set, specify in octal notation
umask=0077

; Minimum UID
min_uid=100

; Minimum GID
min_gid=100

[handlers]
;Handler for php-scripts
x-httpd-suphp="php:/usr/bin/php-cgi"

;Handler for CGI-scripts
x-suphp-cgi="execute:!self"

Finally we restart Apache:

/etc/init.d/httpd restart

 

17 Install PureFTPd

PureFTPd can be installed with the following command:

yum install pure-ftpd

Then create the system startup links and start PureFTPd:

chkconfig –levels 235 pure-ftpd on
/etc/init.d/pure-ftpd start

 

18 Install MyDNS

We can install MyDNS as follows:

wget http://mydns.bboy.net/download/mydns-mysql-1.1.0-1.i386.rpm
rpm -ivh mydns-mysql-1.1.0-1.i386.rpm

When the system boots, MyDNS must be started after MySQL. The MySQL startup link has the priority 64 on CentOS, so the MyDNS startup link must have a priority between 65 and 99. Therefore we open the MyDNS init script…

vi /etc/init.d/mydns

… and change

[...]
# chkconfig: 345 52 50
[...]

to

[...]
# chkconfig: 345 65 50
[...]

Then we create the startup links:

chkconfig –levels 235 mydns on

We don’t start MyDNS now because it must be configured first – this will be done automatically by the ISPConfig 3 installer later on.

 

19 Install Vlogger And Webalizer

Vlogger and webalizer can be installed as follows:

yum install webalizer perl-DateTime-Format-HTTP perl-DateTime-Format-Builder

cd /tmp
wget http://n0rp.chemlab.org/vlogger/vlogger-1.3.tar.gz
tar xvfz vlogger-1.3.tar.gz
mv vlogger-1.3/vlogger /usr/sbin/
rm -rf vlogger*

 

20 Install Jailkit

Jailkit is needed only if you want to chroot SSH users. It can be installed as follows (important: Jailkit must be installed before ISPConfig – it cannot be installed afterwards!):

cd /tmp
wget http://olivier.sessink.nl/jailkit/jailkit-2.5.tar.gz
tar xvfz jailkit-2.5.tar.gz
cd jailkit-2.5
./configure
make
make install
rm -rf jailkit-2.5*

 

21 Install fail2ban

This is optional but recommended, because the ISPConfig monitor tries to show the log:

yum install fail2ban

chkconfig –levels 235 fail2ban on
/etc/init.d/fail2ban start

 

22 Install rkhunter

rkhunter can be installed as follows:

yum install rkhunter

23 Install SquirrelMail

To install the SquirrelMail webmail client, run…

yum install squirrelmail

… and restart Apache:

/etc/init.d/httpd restart

Then configure SquirrelMail:

/usr/share/squirrelmail/config/conf.pl

We must tell SquirrelMail that we are using Courier-IMAP/-POP3:

SquirrelMail Configuration : Read: config.php (1.4.0)
———————————————————
Main Menu —
1.  Organization Preferences
2.  Server Settings
3.  Folder Defaults
4.  General Options
5.  Themes
6.  Address Books
7.  Message of the Day (MOTD)
8.  Plugins
9.  Database
10. Languages

D.  Set pre-defined settings for specific IMAP servers

C   Turn color off
S   Save data
Q   Quit

Command >> <– D

SquirrelMail Configuration : Read: config.php
———————————————————
While we have been building SquirrelMail, we have discovered some
preferences that work better with some servers that don’t work so
well with others.  If you select your IMAP server, this option will
set some pre-defined settings for that server.

Please note that you will still need to go through and make sure
everything is correct.  This does not change everything.  There are
only a few settings that this will change.

Please select your IMAP server:
bincimap    = Binc IMAP server
courier     = Courier IMAP server
cyrus       = Cyrus IMAP server
dovecot     = Dovecot Secure IMAP server
exchange    = Microsoft Exchange IMAP server
hmailserver = hMailServer
macosx      = Mac OS X Mailserver
mercury32   = Mercury/32
uw          = University of Washington’s IMAP server

quit        = Do not change anything
Command >> <– courier

SquirrelMail Configuration : Read: config.php
———————————————————
While we have been building SquirrelMail, we have discovered some
preferences that work better with some servers that don’t work so
well with others.  If you select your IMAP server, this option will
set some pre-defined settings for that server.

Please note that you will still need to go through and make sure
everything is correct.  This does not change everything.  There are
only a few settings that this will change.

Please select your IMAP server:
bincimap    = Binc IMAP server
courier     = Courier IMAP server
cyrus       = Cyrus IMAP server
dovecot     = Dovecot Secure IMAP server
exchange    = Microsoft Exchange IMAP server
hmailserver = hMailServer
macosx      = Mac OS X Mailserver
mercury32   = Mercury/32
uw          = University of Washington’s IMAP server

quit        = Do not change anything
Command >> courier

imap_server_type = courier
default_folder_prefix = INBOX.
trash_folder = Trash
sent_folder = Sent
draft_folder = Drafts
show_prefix_option = false
default_sub_of_inbox = false
show_contain_subfolders_option = false
optional_delimiter = .
delete_folder = true

Press any key to continue… <– press a key

SquirrelMail Configuration : Read: config.php (1.4.0)
———————————————————
Main Menu —
1.  Organization Preferences
2.  Server Settings
3.  Folder Defaults
4.  General Options
5.  Themes
6.  Address Books
7.  Message of the Day (MOTD)
8.  Plugins
9.  Database
10. Languages

D.  Set pre-defined settings for specific IMAP servers

C   Turn color off
S   Save data
Q   Quit

Command >> <–S

SquirrelMail Configuration : Read: config.php (1.4.0)
———————————————————
Main Menu —
1.  Organization Preferences
2.  Server Settings
3.  Folder Defaults
4.  General Options
5.  Themes
6.  Address Books
7.  Message of the Day (MOTD)
8.  Plugins
9.  Database
10. Languages

D.  Set pre-defined settings for specific IMAP servers

C   Turn color off
S   Save data
Q   Quit

Command >> <–Q

One last thing we need to do is modify the file /etc/squirrelmail/config_local.php and comment out the $default_folder_prefix variable – if you don’t do this, you will see the following error message in SquirrelMail after you’ve logged in: Query: CREATE “Sent” Reason Given: Invalid mailbox name.

vi /etc/squirrelmail/config_local.php

<?php
/**
 * Local config overrides.
 *
 * You can override the config.php settings here.
 * Don't do it unless you know what you're doing.
 * Use standard PHP syntax, see config.php for examples.
 *
 * @copyright &copy; 2002-2006 The SquirrelMail Project Team
 * @license http://opensource.org/licenses/gpl-license.php GNU Public License
 * @version $Id: config_local.php,v 1.2 2006/07/11 03:33:47 wtogami Exp $
 * @package squirrelmail
 * @subpackage config
 */
//$default_folder_prefix                = '';
?>

Now you can type in http://server1.example.com/webmail or http://192.168.0.100/webmail in your browser to access SquirrelMail.

25

24 Install ISPConfig 3

Uninstall BIND and Dovecot so that the ISPConfig installer configures ISPConfig for MyDNS and Courier:

yum remove bind dovecot

To install ISPConfig 3 from the latest released version, do this:

cd /tmp
wget http://downloads.sourceforge.net/ispconfig/ISPConfig-3.0.1.tar.gz?use_mirror=
tar xvfz ISPConfig-3.0.1.tar.gz
cd ispconfig3_install/install/

(Replace ISPConfig-3.0.1.tar.gz with the latest version.)

The next step is to run

php -q install.php

This will start the ISPConfig 3 installer:

[root@server1 install]# php -q install.php

——————————————————————————–
_____ ___________   _____              __ _
|_   _/  ___| ___ \ /  __ \            / _(_)
| | \ `–.| |_/ / | /  \/ ___  _ __ | |_ _  __ _
| |  `–. \  __/  | |    / _ \| ‘_ \|  _| |/ _` |
_| |_/\__/ / |     | \__/\ (_) | | | | | | | (_| |
\___/\____/\_|      \____/\___/|_| |_|_| |_|\__, |
__/ |
|___/
——————————————————————————–

>> Initial configuration

Operating System: CentOS 5.2 or compatible

Following will be a few questions for primary configuration so be careful.
Default values are in [brackets] and can be accepted with <ENTER>.
Tap in “quit” (without the quotes) to stop the installer.

Select language (en,de) [en]:

Installation mode (standard,expert) [standard]: <– ENTER

Full qualified hostname (FQDN) of the server, eg server1.domain.tld  [server1.example.com]: <– ENTER

MySQL server hostname [localhost]: <– ENTER

MySQL root username [root]: <– ENTER

MySQL root password []: <– yourrootsqlpassword

MySQL database to create [dbispconfig]: <– ENTER

MySQL charset [utf8]: <– ENTER

Generating a 2048 bit RSA private key
…………………………………………+++
………………………………………………………………………+++
writing new private key to ‘smtpd.key’
—–
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter ‘.’, the field will be left blank.
—–
Country Name (2 letter code) [GB]:
<– ENTER
State or Province Name (full name) [Berkshire]: <– ENTER
Locality Name (eg, city) [Newbury]: <– ENTER
Organization Name (eg, company) [My Company Ltd]: <– ENTER
Organizational Unit Name (eg, section) []: <– ENTER
Common Name (eg, your name or your server’s hostname) []: <– ENTER
Email Address []: <– ENTER
Configuring Jailkit
Configuring SASL
Configuring PAM
Configuring Courier
Configuring Spamassassin
Configuring Amavisd
Configuring Getmail
Configuring Pureftpd
Configuring MyDNS
Configuring Apache
Configuring Firewall
Installing ISPConfig
ISPConfig Port [8080]:
<– ENTER

Configuring DBServer
Installing Crontab
no crontab for root
no crontab for getmail
Restarting services …
Stopping MySQL:                                            [  OK  ]
Starting MySQL:                                            [  OK  ]
Shutting down postfix:                                     [  OK  ]
Starting postfix:                                          [  OK  ]
Stopping saslauthd:                                        [  OK  ]
Starting saslauthd:                                        [  OK  ]
Shutting down Mail Virus Scanner (amavisd):                [  OK  ]
Starting Mail Virus Scanner (amavisd):                     [  OK  ]
Stopping Clam AntiVirus Daemon:                            [  OK  ]
Starting Clam AntiVirus Daemon:                            [  OK  ]
Stopping Courier authentication services: authdaemond
Starting Courier authentication services: authdaemond
Stopping Courier-IMAP server: imap imap-ssl pop3 pop3-ssl
Starting Courier-IMAP server: imap imap-ssl pop3 pop3-ssl
Stopping httpd:                                            [  OK  ]
Starting httpd:                                            [  OK  ]
Stopping pure-ftpd:                                        [  OK  ]
Starting pure-ftpd:                                        [  OK  ]
Installation completed.
[root@server1 install]#

The installer automatically configures all underlying services, so no manual configuration is needed.

Afterwards you can access ISPConfig 3 under http://server1.example.com:8080/ or http://192.168.0.100:8080/. Log in with the username admin and the password admin (you should change the default password after your first login):

36

37

The system is now ready to be used.

 

24.1 ISPConfig 3 Manual

 

  • CentOS: http://www.centos.org/
  • ISPConfig: http://www.ispconfig.org/

 

 

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