DATAPUISTOKEMISTI

Updated:  http://blog.asiantuntijakaveri.fi/2013/04/handbrake-auto-crop-and-channel-logos.html

After spending way too much time trying to figure out why new HP's can't boot from USB I finally spotted  this .

Install Devel::Trace (libdevel-trace-perl in Ubuntu) and launch your program using "perl -d:Trace ./xx.pl" like syntax. This gives you tracing similar to "set -x" on shell scripts.

Until recently rtorrent didn't support adding new trackers to torrent except by editing actual .torrent. Either manually, with some tool or via online service such as http://www.torrenteditor.com. Recently support to add trackers on the fly to active torrent was added, but documentation seems to be little thin.

"Usual" places on Linux will show wrong CPU frequency for Intel Turbo Boost enabled CPUs. You can check actual frequency used with "i7z". It works with i3, i5 and i7 series processors.

Been bit quiet lately. I might as well document another hack to entertain my very small audience. This time post is about how to add custom entries to Windows 7 start menu. Not under all programs, but directly to same level as other options such as Control Panel, My Computer etc.

This post is closely related to my  previous  one. Big difference is that in this case company we bought had Lotus Notes based email system that had to be kept running concurrently with new common email platform for several months. Well, actually it is still running to some extent over 4 years later but that's another story.

Few hours ago you got called to meeting with your boss. You were told that company you're working for just bought another firm and everything needs to be integrated ASAP starting with unifying email addresses.

Some time ago I wrote about how to make multiple unreliable Internet connections function like single reliable Internet connection. That was done using OpenVPN and some iptables trickery. This time we're going to do same without OpenVPN and without iptables.

Here's another interesting little known feature of Linux kernel GRE support.

Often it's not necessary to encrypt traffic when tunneling L2 network over L3 in corporate environment. I hear, you say use OpenVPN, tinc, gvpe, n2n etc. Now, did you know that there's easy built-in solution that has been part of Linux kernel since 2.6.29? If you need encryption just use IPsec to protect GRE traffic.

These are kind of "last resort" fixes if all normal ways fail to resolve problem. No guarantees. Worked for me...

It turned out to be just like I suspected , Planet WNAP-7300 (at least with firmware "2.0.3(PL)4") is exactly same device as Zcomax ZCN-1523H-5. Atheros AR7240 rev. 2 at 350MHz, Atheros AR9280 rev 2 5GHz radio, 32MB RAM, 8MB Flash and two 10/100 Ethernet ports. Therefore it works with Zcomax OpenWrt firmware. Bridge performance seems acceptable, around 70Mbit/s real world in bridged mode and 60Mbit/s if OpenWrt is doing NAT. With around 25 meters nearly line-of-sight performance is ~40Mbit/s. All tests uni-directional TCP (FTP/HTTP) with no other traffic than ICMP echo going on at the same time.

Didn't see this documented anywhere so here it is. How to use Finnish dy.fi dynamic DNS service with OpenWrt router.

Host system configuration: Intel Core2Duo 6300 w/VT CentOS 5.7 x64 VMware Workstation 8.0.1

For some reason latest Strongswan version for Ubuntu is still 4.5.1. See below how to compile and package latest 4.6.2dr3. Not pretty, but works for me when testing new version.

As OpenWrt Wiki lacks this particular example (there's other L2TPv3 examples) I guess better I document it somewhere.

Instructions were tested with Ubuntu 11.04.

Hi, I'm Troy McClure. You might remember me from such posts as Failure #1 and Failure #2 . Today I'm here to tell you about "OpenVPN inside OpenVPN".

We mirror our hard disks, we mirror RAM on servers. Why not mirror network traffic as well? 

Got packet loss? Got two or more connections? Got server somewhere to route packets thru?

My notes on setting up extroot on USB memory stick with OpenWrt on TP-Link MR3220 v1.