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Author Archives: MP
SPAM Whitelisting
Whitelisting can help you to get your emails reach inbox instead of spam folder, i will teach you now how to whitelist your self on some spam filter systems and some email providers. First of all you must have a … Continue reading
Posted in Exim, Mail server, Postfix
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How To Rotate IP Address Pool In Linux (Redhat / Centos / Ubuntu / Debian)
You can rotate your Server IP address pool in Linux server by using iptable NAT Postrouting. I assume you have 8 public IP addresses (x.x.x.1 TO x.x.x.8) configure on Linux postfix server. Now we rotate only SMPT (port no. 25) … Continue reading
Posted in Exim, Linux, Mail server, Plesk, Postfix
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Install FFmpeg on CentOS or RedHat EL 6.x
Install FFmpeg on CentOS or RedHat EL 6.x If you are upgrading from a previous version of Razuna you should always update your ImageMagick, Exiftool and Ffmpeg installation! Install the additional repo Install all necessary packages Install xvid Install LibOgg Install Libvorbis … Continue reading
Posted in Apache, Linux
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HOWTO Virtual Mail Hosting on CentOS 6.x – Postfix MySQL Dovecot PostfixAdmin Amavisd-new Spamassassin Clamav DKIM SPF
Introduction This is an advanced email server configuration. This configuration will allow you to serve multiple domains on one server. This howto will allow you to setup a server that is one of four mail server types: Mail server with … Continue reading
Posted in Apache, DNS, Linux, Mail server, MySQL, PHP, Postfix
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Forwarder zone
If you want a name server to forward queries for certain domain names to another name server, use a zone statement of type forward to tell a BIND server to forward queries for domain names that end in the specified suffix to particular … Continue reading
Posted in DNS, Linux
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Stub zones
Stub zones are a little like slave zones, in that the name server periodically checks with its master server to see if the zone’s serial number has changed. But instead of transferring the whole zone, it retrieves just the zone’s … Continue reading
Posted in DNS, Linux
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Tips to secure your Apache Server
As a sysadmin, you should secure your Apache web server Hide Apache Version and OS Identity Open configuration file with vim editor and search for “ServerSignature“, its by default On. We need to Off these server signature and the second … Continue reading
Posted in Apache
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Linux tools
In order to get the list of sorted folders size with folder name on level 1, I figured out a method which would be helpful all admins. du -h –max-depth=1 <<folder name>>| perl -e ‘sub h{%h=(K=>10,M=>20,G=>30);($n,$u)=shift=~/([0-9.]+)(\D)/; return $n*2**$h{$u}}print sort{h($b)<=>h($a)}<>;’ Note … Continue reading
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Editing users cronjob through ssh
I can see cronjobs owned by root by crontab -l You can use following command to see user’s crons crontab -u username -l User’s cron jobs reside in /var/spool/cron/ you can see them there also. You would have to run … Continue reading
Posted in Linux
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