Linux System Admins Blog

I noticed lots of email being relayed on one of our shared hosting server, CentOS5 with Cpanel and running Exim, and the strange thing is that the email server (MX) for these accounts are pointing to Google (GoogleApps), and we have correct entries for localdomains and remotedomains for these account. The relayers (‘From’ server/address) [...]

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With the release of Apache 2.2.12, we can now configure multiple SSL sites in one IP address. It is available of you have Server Name Indication (SNI) extension for OpenSSL. Visit TechRepublic’s post on “Configure Apache to support multiple SSL sites on a single IP address” for details and vhost sample configuration. [...]

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A time comes when it makes more business sense to outsource DNS. While one can use a domain registrars to manage and host dns they do not always offer best performance or even offer SLA’s. We will compare a couple of companies that specialize at DNS hosting only.
DynDNS
- comprehensive services offerings
- no downtimes since inception [...]

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The whole hidden IFRAME vulnerability has been going on for some time, only a few of our client have been effected by this. The net is still buzzing with this issue and while some are saying that the injection are results of php insecurities, mysql injection or cross site scripting, while others point to key [...]

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When using cPanel the way to enable allow_url_include directive locally (per user) is to create an Virtual Host include:
First create an include file:
/usr/local/apache/conf/userdata/std/2/username/domain.com/custom.conf
Add directive to custom.conf:

php_admin_flag allow_url_include On

Then run to enable include:
/scripts/ensure_vhost_includes –user=username –verbose
Alternatively, enabling allow_url_include globally (server-wide) is done by editing /usr/local/lib/php.ini and adding “allow_url_include = On” directive to the Fopen wrapper section.
;;;;;;;;;;;;;;;;;;
; [...]

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Looking to rewrite all file requests to index?
location / {
root /var/www/nginx-default;
index index.html;
if (!-e $request_filename) {
rewrite . /index.html last;
}
}

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Ran into an issue today where a php created file was unreadable by other users or services that run under a different user. Since this is a software originated issue the sysadmin would love for the developer to change the code to include the chmod() php function to set permission to 644 after [...]

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Aside from missing coconut trees and hula girls distinguishing our data center from Hawaii was pretty tough this afternoon. It was HOT, so hot in fact that I was sweating while sitting in just a cotton tee-shirt. I kept drifting away into a daydream where that failed 20 ton Liebert A/C unit was running. Soon [...]

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In some cases you would want to have your site use SSL (https://) at all times you can do this by using:
1.) Using Htaccess/mod_rewrite. You only need to create a .htaccess file on your home directory and add the codes below:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteRule ^/(.*) https://%{SERVER_NAME}/$1 [R,L]
</IfModule>

The above codes may not work on [...]

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I am at Drupal Conference attending the Acquia Apache Solr presentation. This integration has a lot of promise in my opinion.  The drupal search is not that useful, we’ve actually replaced drupal search on our implementations with google custom search.
Apache Solr is an open source project:
Solr is an open source enterprise search server based on [...]

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