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Posts Tagged ‘linux’

Rsync On CentOS 5.6

posted in General, Technical
by on September 9th, 2011 tags: , , , , ,

Just a quick blog about Rsync on A CentOS 5.6 box. I’m currently using Rsync to backup our Samba Server – all 500 Gigs of it!!

It’s going to take a few days but it will have an exact replica of the Samba server on the Rsync server and you don’t have to have any clients installed on other machines for Rsync to work. All you need is administrative credentials on the machine you are going to Rsync with.

Once I’ve figured all of this out, I will be setting my Rsync box to start backing up automatically every night (full backup) and also, when a file is changed on the Samba Server. I’m going to try and figure out the latter as I haven’t figured out how Rsync will be able to detect that a file has changed or been removed, etc. Once I have done so though I’m sure it’s going to be very handy, also I’ll be setting the Rsync box to backup all of the the user areas and profiles held on the DCs and also the users folder on the PCs.

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Using TCPDUMP to Capture and Analyse Packets

posted in General, Technical
by on August 30th, 2009 tags: , , ,

Recently we needed to analyze packet flow through a router which had roughly 1000+ DSL customers running through. Initially we used Wireshark, but Wireshark has a nasty habit of crashing when trying to analyze so many packets and sessions. In fact this bug is a known bug and can be viewed here: http://wiki.wireshark.org/KnownBugs/OutOfMemory

Our capture server was initially running Windows 2003 with only 1GB of ram. This lasted roughly an hour or less capturing before dying. We upgraded the ram to 4GB but the server would still crash, albeit after about 2 hours now.

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Getting Started with TACACS+

posted in Cisco Networking, Technical
by on August 4th, 2009 tags: , , , , ,

Why a mini HOWTO? Well I’m going to explain how I set up a simple TACACS+ server on a Linux box. If you want any sort of AD integration you’ll need to look elsewhere.

I recently got given the project of installing a new linux box with a number of services. One of them was to replace the old TACACS+ server that has been claiming it’s pension already for a number of years.

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