Tag Archives: linux

How to use iptables to rate-limit packet storms

Posted on June 10, 2012 by richard

Network Probes are part and parcel of being on the Internet, some of them are just “port probes”, some are more malicious, being a constant stream of attempts to login to a service, either way Linux provides a way to … Continue reading →

Posted in Network Presence | Tagged , , | 1 Comment

Speeding up Heavy PHP Sites like Drupal/Joomla

Posted on April 10, 2012 by richard

Here’s a few tips and suggestions to lower the ave. memory usage and increase the efficiency of heavy PHP sites delivered via Apache on Linux VPS platforms. The aim here is to “appropriately scale” both the size of the Apache … Continue reading →

Posted in Network Presence | Tagged , , , | Comments Off on Speeding up Heavy PHP Sites like Drupal/Joomla

How to install cPanel on your VPS

Posted on September 1, 2011 by richard

We’ve done a few of these installs for customers lately & it’s really very simple, so here’s a short step-by-step on it. a) Ensure you have a good amount of disk space available and that your VPS OS is up … Continue reading →

Posted in Network Presence | Tagged , , | 1 Comment

Rolling out Smokeping & Nagios nodes across our Network & out to the Internet

Posted on July 6, 2011 by richard

After a customer had a unique network problem, I’ve created & deployed a few instances in each of our POPs of a “Smokeping & Nagios” Appliance VPS, and this VPS is now available as a service from Network Presence too. … Continue reading →

Posted in Network Presence | Tagged , , , , , | Comments Off on Rolling out Smokeping & Nagios nodes across our Network & out to the Internet

Installing SpamAssassin & ClamAV with Amavisd-milter on Sendmail on CentOS 5

Posted on June 12, 2011 by richard

I’ve previously described the install & setup process for spamass-milter on Sendmail for Anti-Spam processing. This blog post describes a different interface to Sendmail for Anti-Spam & Anti-Virus (AS/AV), using the Amavis daemon (amavisd-new) along with the Milter interface for … Continue reading →

Posted in Network Presence | Tagged , , , , , | 3 Comments

Installing ClamAV & SpamAssassin to CentOS 5 with Sendmail

Posted on June 12, 2011 by richard

Installing these Mail Server open-source software sets to CentOS 5 with Sendmail on a 64-bit CentOS 5.4 (or higher) Linux host. 1. Install RPMForge Repo to get access to more Software Packages for CentOS5 Install (using rpm -Uvh) http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.2-2.el5.rf.x86_64.rpm 2. … Continue reading →

Posted in Network Presence | Tagged , , , | Comments Off on Installing ClamAV & SpamAssassin to CentOS 5 with Sendmail

Upgrading your VPS from Debian 5 to Debian 6

Posted on June 7, 2011 by richard

Recently there’s been released an upgraded version of the popular Debian GNU/Linux distribution, from Debian version 5 to version 6, otherwise known of Debian “Lenny” to “Squeeze”. The following is a step-by-step guide for Network Presence customers on upgrading their … Continue reading →

Posted in Network Presence | Tagged , , | Comments Off on Upgrading your VPS from Debian 5 to Debian 6

Using parted on > 2TB drives to create new partitions for LVM

Posted on June 3, 2011 by richard

On your Linux based hardware with “large” disks (>> 2TB drives to Linux) you may want to use the GNU ‘parted’ disk partition utility to create storage that’s available to the kernel & LVM. As root run ‘parted /dev/sdX’ where … Continue reading →

Posted in Network Presence | Tagged , | Comments Off on Using parted on > 2TB drives to create new partitions for LVM

Securing /tmp & other Linux Webhost “tightening” measures

Posted on May 26, 2011 by richard

As per a post in our Forums, we’ve recently outlined how to get your Linux system a separate /tmp filesystem, which won’t allow executables and has other values to keep ‘nefarious’ content out of /tmp In this post we outline … Continue reading →

Posted in Network Presence | Tagged , | Comments Off on Securing /tmp & other Linux Webhost “tightening” measures

Old School way of viewing Unix Man pages

Posted on May 25, 2011 by richard

“nroff -man /path/to/manpage.man | more”. ie: they’re just nroff formatted text files. The files are often gzip compressed on disk nowadays, so on Linux, the command pipeline to (say) the ls command’s man page from a shell prompt is: zcat … Continue reading →

Posted in Network Presence | Tagged , , , | Comments Off on Old School way of viewing Unix Man pages