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Centos: How to fine tune your Apache SSL server

Centos: How to fine tune your Apache SSL server 1
The fine tuning of the SSL server side configuration is slow and tedious but necessary procedure. It’s always good to have your SSL site to conform the most latest security standards. It boosts ego and makes customer happy too. It turns out that all you need for that is already at your disposal the point is to properly configure it.
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Centos: recover MySQL users access after upgrade to MySQL-5.5

I had one of my customers asking me for the MySQL server version upgrade (OS provided MySQL 5.1.73 to something above MySQL 5.5) for one of his dedicated servers. Neither of us expected any problems from that, but we’ve ran into some that we had to resolve quickly because of production web sites running on the same server.
For more modern software versions I usually use excellent IUS reposity which in combination with EPEL repository serves about 87% of my needs in 3rd party packages and updates.
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Wordpress: Database access error of doom

wp-db-error Usually it happens after migration. When there is absolutely nothing that could possibly go wrong:
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sysadmin: cPanel installation script detected MySQL and failed

While trying to install cPanel control panel on just reimaged server I’ve got an interesting error, I’ve never seen before:

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sysadmin: Apache, FastCGI and PHP-FPM working config

apache-php-fpm
I was looking for working config for the combination of apache mod_fastcgi and PHP-FPM and could not find any. I mean there were plenty of examples and discussions but none of them were operational. The closest was the article on server-world.info site.
Based on that information I was able to put together working configuration for multiple virtual hosts.
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Sysadmin: How to see the name of PHP script that sent that e-mail

phplogo SPAM e-mail is the common problem these days and in most cases the cause of this problem is the lack of security on the hosted web sites. Various badly designed PHP scripts expose the hosting server MTA to be used as SPAM e-mails source. First and foremost step in resolving this problem would be to determine the originating PHP script that was used to send e-mails.
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Sysadmin: How to install latest ffmpeg on Centos

Ffmpeg_new_logo
I had a request to install latest ffmpeg on one of our Cnetos 5 servers the other day. Since I’m trying to stick the the proper package management I’ve had to look for the most recent ffmpeg RPM package on the pkgs.org site. As in most cases the search pointed me towards atrpms.net repository. Pkgs.org contains pretty detailed instruction on how to add the repository that contains the package you require but unfortunately it was not all that straightforward with atrpms.net
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Sysadmin: “[warn-phpd] mmap cache can’t open file … ” mystery solved

Sysadmin: "[warn-phpd] mmap cache can't open file ... " mystery solved 2
Yesterday I was asked by one of our old customers to help solving very interesting problem – he put some php files outside of apache DocumentRoot on his server and the apache could not access the files, producing very interesting lines into apache default error_log

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Centos: how to install cpanel

cpanel “Extremely friendly…widely used …de-facto industry standard” cPanel all this and more. And I dislike it as much as it popular (I’ll talk about it later).
What surprised me that cpanel.net web site does not contain the link to the installation instruction on it’s front page which should be only logical.
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Using lsof to find trojan processes on Linux.

In my previous post I was telling about checking for programs using network on Linux using lsof tool.
Here I have “live” example of such backdoor found on one of our servers.
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