Menambah Quota Kirim File di Postfix Mail Server

Some other parameters you need to change are in file php.ini which is usually located in dir /etc. Set their parameters as above or higher values as below:post_max_size = 20M
upload_max_filesize = 20M

reload or restart postfix when you're done:

service postfix reload

or

service postfix restart

There's also mailbox_size_limit directive. You need to change this if SM can not open mailbox sized more than 10 MB.

Souce : http://muhdzamri.blogspot.com

Setup Mail Server using Postfix, Dovecot and SquirrelMail in CentOS/RHEL/Scientific Linux step by step

Before install postfix, remove sendmail from the server. Because sendmail is the default MTA in Redhat/CentOS.

[root@server ~]# yum remove sendmail

Prerequisites:

• The mail server should contain a valid MX record in the DNS server. Navigate to this link how to setup DNS server.
• Firewall and SELinux should be disabled.

[root@server ~]# service iptables stop
[root@server ~]# service ip6tables stop
[root@server ~]# chkconfig iptables off
[root@server ~]# chkconfig ip6tables off

[root@server ~]# vi /etc/selinux/config
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
SELINUX=disabled# SELINUXTYPE= can take one of these two values:
#     targeted - Targeted processes are protected,
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted

Reboot the server.

Scenario

In this tutorial my test box

Hostname     = server.kasepuhan.net

IP Address    = 192.168.1.200/24

And my server is configured with proper MX record in DNS server.

Installation

Postfix is installed by default. If it is not installed, use the below command to install postfix.

[root@server ~]# yum install postfix

Configuration

Open the postfix config file /etc/postfix/main.cf. Find the below lines and edit them as shown below.

[root@server ~]# vi /etc/postfix/main.cf
myhostname = server.ostechnix.com ##line no 75 - uncomment and enter your host name
mydomain = ostechnix.com  ##line no 83 - uncomment and enter your domain name 
myorigin = $mydomain  ##line no 99 - uncomment
inet_interfaces = all  ##line no 116 - change to all
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain  ##line no 164 - add $domain at the end
mynetworks = 192.168.1.0/24, 127.0.0.0/8  ##line no 264 - uncomment and add your network range
home_mailbox = Maildir/  ##line no 419 - uncomment

Start the postfix service.

[root@server ~]# service postfix start
Starting postfix:                                          [  OK  ]
[root@server ~]# chkconfig postfix on

Test Postfix

The commands shown in bold letters should be entered by the user. 

Note: The dot after the test command is important.

[root@server ~]# telnet localhost smtp
Trying ::1...
Connected to localhost.
Escape character is '^]'.
220 server.ostechnix.com ESMTP Postfix
ehlo localhost
250-server.ostechnix.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
mail from:
250 2.1.0 Ok
rcpt to:
250 2.1.5 Ok
data
354 End data with .
test
.
250 2.0.0 Ok: queued as 117113FF18
quit
221 2.0.0 Bye
Connection closed by foreign host.

Check Mail

Navigate to the user mail directory and check for the new mail.

[root@server ~]# cd /home/user1/Maildir/new/[root@server new]# ls
1360236956.Vfd00I35afM181256.server.ostechnix.com
[root@server new]# cat 1360236956.Vfd00I35afM181256.server.ostechnix.com Return-Path: 
X-Original-To: user1
Delivered-To: user1@ostechnix.com
Received: from localhost (localhost [IPv6:::1])
 by server.ostechnix.com (Postfix) with ESMTP id 117113FF18
 for ; Thu,  7 Feb 2013 17:05:32 +0530 (IST)
Message-Id: <20130207113547 .117113ff18="" server.ostechnix.com="">
Date: Thu,  7 Feb 2013 17:05:32 +0530 (IST)
From: user1@ostechnix.com
To: undisclosed-recipients:;
test

Thats it. Postfix working now.

Install Dovecot

[root@server ~]# yum install dovecot

Configure Dovecot

Open the dovecot config file /etc/dovecot/dovecot.conf. Find and uncomment the line as shown below.

[root@server ~]# vi /etc/dovecot/dovecot.conf
protocols = imap pop3 lmtp

Open the file /etc/dovecot/conf.d/10-mail.conf and uncomment the line as shown below.

[root@server ~]# vi /etc/dovecot/conf.d/10-mail.conf
mail_location = maildir:~/Maildir  ##line no 24 - uncomment

Open the /etc/dovecot/conf.d/10-auth.conf and edit as shown below.

[root@server ~]# vi /etc/dovecot/conf.d/10-auth.conf
disable_plaintext_auth = no  ##line no 9 - uncomment and change from yes to no.
auth_mechanisms = plain login  ##line no 97 - add the text "login"

Open the /etc/dovecot/conf.d/10-master.conf and edit as shown below.

unix_listener auth-userdb {
    #mode = 0600
    user = postfix  ##line no 83 - uncomment and enter postfix
    group = postfix  ##line no 84 - uncomment and enter postfix

Start the dovecot service.

[root@server ~]# service dovecot start
Starting Dovecot Imap:                                     [  OK  ]
[root@server ~]# chkconfig dovecot on 

Test Dovecot

The commands shown in bold should be entered by the user.

[root@server ~]# telnet localhost pop3
Trying ::1...
Connected to localhost.
Escape character is '^]'.
+OK Dovecot ready.
user user1
+OK
pass user1
+OK Logged in.
list
+OK 1 messages:
1 428
.
retr 1
+OK 428 octets
Return-Path: 
X-Original-To: user1
Delivered-To: user1@ostechnix.com
Received: from localhost (localhost [IPv6:::1])
 by server.ostechnix.com (Postfix) with ESMTP id 117113FF18
 for ; Thu,  7 Feb 2013 17:05:32 +0530 (IST)
Message-Id: <20130207113547 .117113ff18="" server.ostechnix.com="">
Date: Thu,  7 Feb 2013 17:05:32 +0530 (IST)
From: user1@ostechnix.com
To: undisclosed-recipients:;
test
.
quit 
+OK Logging out.
Connection closed by foreign host.
[root@server ~]# 

Dovecot is working now.

Install Squirrelmail

Install EPEL repository first. And install SquirrelMail package from EPEL repository.

[root@server ~]# wget http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
[root@server ~]# rpm -ivh epel-release-6-8.noarch.rpm 
[root@server ~]# yum install squirrelmail
[root@server ~]# service httpd start
Starting httpd:                                            [  OK  ]
[root@server ~]# chkconfig httpd on
[root@server ~]# 

Configure Squirrelmail

Go to the squirrelmail config directory and use the command ./conf.pl to start configure as shown below.

[root@server ~]# cd /usr/share/squirrelmail/config/
[root@server config]# ./conf.pl 
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 >>1 

Select option 1 and set organization details.

SquirrelMail Configuration : Read: config.php (1.4.0)
---------------------------------------------------------
Organization Preferences
1.  Organization Name      : kasepuhan
2.  Organization Logo      : ../images/sm_logo.png
3.  Org. Logo Width/Height : (308/111)
4.  Organization Title     : Welcome to kasepuhan webmail
5.  Signout Page           : 
6.  Top Frame              : _top
7.  Provider link          : http://kasepuhan.net
8.  Provider name          : kasepuhan
R   Return to Main Menu
C   Turn color off
S   Save data
Q   Quit
Command >>R 

Press R to return main menu and select option 2. Enter your domain name and select dovecot in the Sendmail or SMTP parameter.

SquirrelMail Configuration : Read: config.php (1.4.0)
---------------------------------------------------------
Server Settings
General
-------
1.  Domain                 : kasepuhan.net
2.  Invert Time            : false
3.  Sendmail or SMTP       : SMTP
A.  Update IMAP Settings   : localhost:143 (uw)
B.  Update SMTP Settings   : localhost:25
R   Return to Main Menu
C   Turn color off
S   Save data
Q   Quit
Command >> S

Once you done, press S to save datas and press Q to exit.

Add the following lines in the httpd.conf file at the end.

[root@server ~]# vi /etc/httpd/conf/httpd.conf
Alias /squirrelmail /usr/share/squirrelmail

    Options Indexes FollowSymLinks
    RewriteEngine On
    AllowOverride All
    DirectoryIndex index.php
    Order allow,deny
    Allow from all

Restart the httpd service. 

[root@server ~]# service httpd restart
Stopping httpd:                                            [  OK  ]
Starting httpd:                                            [  OK  ]
[root@server ~]# 

Create Users

[root@server ~]# useradd user1
[root@server ~]# useradd user2
[root@server ~]# passwd user1
[root@server ~]# passwd user2

Open the browser from any clients. Type the following in the address bar.

http://serveripaddress/webmail

or

http://yourdomainname/webmail

Source  http://ostechnix.wordpress.com

VirtualBox 4.2.16 On Centos

1. Login as Root
su
su -i

2. Install RHEL Repo Files

 wget http://download.virtualbox.org/virtualbox/rpm/rhel/virtualbox.repo

3. Update Lates Package and check your kernel version

yum update

rpm -qa kernel |sort |tail -n 1

uname -r

 Note: If you got kernel update or run older kernel than newest installed then reboot:

reboot

4. Install Following dependency packages

rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm

5. Install Virtual Box Lates Version 4.2

 yum install VirtualBox-4.2

 Rebuild kernel modules with following command:

etc/init.d/vboxdrv setup
## OR ##
service vboxdrv setup

6. Add VirtualBox User(s) to vboxusers Group

 Replace user_name with your own user name or some another real user name.

usermod -a -G vboxusers user_name

7. Start VirtualBox

Go application 

For Troubleshooting

## Current running kernel on CentOS and Red Hat (RHEL) ##
KERN_DIR=/usr/src/kernels/`uname -r`-`uname -m` 

 KERN_DIR=/usr/src/kernels/2.6.18-194.11.1.el5-x86_64

 ## Export KERN_DIR ##
export KERN_DIR

Source :  http://www.if-not-true-then-false.com  (Thanks )

Konfigurasi FTP Server Pada Centos 5.3

1. Instalasi Paket vsftpd
[root@localhost ~]# yum install vsftpd
2. Konfigurasi
[root@localhost ~]# vim /etc/vsftpd/vsftpd.conf
Yang perlu dirubah adalah:
anonymous_enable=NO
local_enable=YES
write_enable=YES
local_umask=022
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
xferlog_std_format=YES
ascii_upload_enable=YES
ascii_download_enable=YES
ftpd_banner=Welcome to FTP Server K-Place.
chroot_list_enable=YES
chroot_list_file=/etc/vsftpd/chroot_list
listen=YES
pam_service_name=vsftpd
userlist_enable=YES
tcp_wrappers=YES

3. Membuat user lokal dengan nama noc
[root@localhost ~]# adduser noc
[root@localhost ~]# passwd noc
Changing password for user noc.
New UNIX password:
BAD PASSWORD: it is too simplistic/systematic
Retype new UNIX password:
passwd: all authentication tokens updated successfully.

4. Membuat file chroot_list
File ini berisi daftar user yang bisa mengakses FTP server.
[root@localhost ~]# vim /etc/vsftpd/chroot_list
Isinya adalah :
noc
5. Restart Service FTP
[root@localhost ~]# service vsftpd restart
[root@localhost ~]# chkconfig vsftpd on

6. Cek konfigurasi FTP
[root@localhost ~]# getsebool -a | grep ftp
allow_ftpd_anon_write --> off
allow_ftpd_full_access --> off
allow_ftpd_use_cifs --> off
allow_ftpd_use_nfs --> off
allow_tftp_anon_write --> off
ftp_home_dir --> off
ftpd_disable_trans --> off
ftpd_is_daemon --> on
httpd_enable_ftp_server --> off
tftpd_disable_trans --> off

Dari hasil diatas bahwa ftp_home_dir masih berstatus off. Supaya FTP jalan maka harus diaktifkan dengan perintah :
[root@localhost]# setsebool -P ftp_home_dir on
[root@localhost]# iptables -F

7. Testing FTP

  Source : http://1100060884.blog.binusian.org

Resetting MySQL Root Password on CentOS

(Don’t forget that you need to login to your server as root in order to achieve this)

1) Start MySQL in safe mode.
2) Reset the root password.
3) Flush privileges.
4) Create a my.cnf file so that you can automatically log-in next time.

1	# service mysqld stop

2	# mysqld_safe --skip-grant-tables &

3	# mysql -u root

4	> update mysql.user set password=PASSWORD("newpass") where User='root';

5	> flush privileges;

6

> exit;

7	# { echo "[client]"; echo "user=root"; echo "password=newpass"; } >> /root/.my.conf

8	# service mysqld restart

Solve #2002 - The server is not responding (or the local MySQL server's socket is not correctly configured)

Just Start your mysql server :

for automaticaly running while restart your system ,

chkconfig mysqld on
and then start your mysql server

service mysqld start

Solve Forbidden You don't have permission to access /phpmyadmin/ on this server.

Edit your httpd.conf file as follows:

# nano /etc/httpd/conf/httpd.conf

Add the following lines here:

    Order allow,deny
    Allow from all

 # service httpd restart

If your problem is not solved then disable your SELinux.

and when got eror need  blowfish secret  just do this thing:
edit file config.inc.php in /usr/share/phpmyadmin
 nano/usr/share/phpmyadmin/config.inc.php

put your password

$cfg['blowfish_secret'] = ‘dfd3kjGj12dfT27665Z‘; /* YOU MUST FILL IN THIS FOR COOKIE AUTH!