Algorhyme

I think that I shall never see a graph more lovely than a tree. A tree whose crucial property is loop-free connectivity. A tree that must be sure to span so packet can reach every LAN. First, the root must be selected. By ID, it is elected. Least-cost paths from root are traced. In the t...

It’s become a firm fixture of everyday life, loathed by some but essential to nearly all of us, and yet its future is far from certain. Email is forty years old this month, with the first message having been sent in October 1971.

The birth of email

Like many technological innovations, email ha...

It is not ending at all - the series of problems using Cisco OVAs within my VMWare Workstation installation. After solving some minor issues I found out that VMWare got shipped with a pretty old OVF-tool. Hitting to the VMWare site and downloading the new one took me one stop closer.

The OVA can...

How to add extra storage on the fly using LVM. Here are the steps I used to get my 80GB Maxtor(sda) and 60GB Western Digital(sdb) to work together as one logical unit. I am also using ext3 as my filesystem because it supports on-line resizing.

  • Fresh install of Ubuntu Server 8.10
  • Run updates: sud...

uTorrent has no easy nor automated way to activate IP filtering based on BlueTacks IP list. Anyway - it is possible following some easy steps.

  1. Download Blocklist Pro Security filtering list (the newest I found) http://blocklistpro.com/download-center/p2p-ip-filters/
  2. uncompress the file to a fol...

Downloaded a OVA file and tried to import it into my VMWare Workstation and if something can go wrong - it does.

the ova package name does not match the ovf file inside it was the error message, after some searching I found out that a OVA is nothing else than a compressed tar file with another...

After rolling out the proxy settings within my network, there is another nice feature I stumbled upon: "Networks using Windows 2003 and/or 2008 Servers as a DNS do or can block wpad request by default."

Nice if you do not use it - but kinda hard to find if you need it and don't know it.

Window...

I was a fan of WCCP for setting up transparent proxy within a network - it always seemed the easiest way but all together it only seemed like that. A lot of problems came up in the past few month on customer sides and within my installation so I decided to give Proxy Auto-Configuration a try.

Bigg...

Configuring Ciscos CallManager 4.0 and above to use NTP is not as simple as it should be. First at all, CCM 4.0 is using Windows 2000 as a base system and NTP nor SNTP is enabled there per default. Especially Win2000 is using SNTP, therefore CCM 4.0 is installing a separate NTP service which has to...

After a lot of testing and playing around with my PowerMac (which I do not own any more) I found out that Ubuntu 10.10 is working without any problems out of the box. That was the best solution for first time installation and then I upgraded to the newest version. But before I came to this conclusio...