Sunday 19 December 2010

VOIP QoS on Dual-WAN ADSL Cisco 1841

Just now I'm messing about with a Cisco 1841 router with two ADSL cards in it (as outlined in an earlier post to this blog). I'll write in more detail about the IOS settings later, but meanwhile I'd appreciate some pointers if anyone has a suitable IOS config to share...

Monday 6 December 2010

Dual-WAN ADSL with Cisco 1841

I've got a second ADSL line now, so I've just started playing with bonding my two lines together using a Cisco 1841 router with two ADSL cards.  It works pretty nicely out of the box, but as ever, some small lurking matters have emerged...

Wednesday 17 November 2010

Updating FreeBSD 7.3 to 8.1 on Soekris NET5501

Just a quick heads-up if you're updating a FreeBSD server with a serial console.

Thursday 21 October 2010

Ubuntu 10.10 First Impressions

Tried out clean installs of Ubuntu 10.10 (Maverick Meerkat) on two Dell Latitude D620 systems yesterday.

Saturday 16 October 2010

Apple iPad first impressions

I finally got an iPad a few days ago.  Generally, it's a very impressive device - as it should be for the price.  Just some initial observations:

Saturday 9 October 2010

Ubuntu Server virtualisation on Kimsufi hosting

After yesterday's false start with Citrix XenServer, today I'm switching to Ubuntu Server as my VM hosting platform.

Virtualizing my Internet server

I'm about to start work on a new non-profit website using a content management system so that other people can help to edit the content.  I'm hoping that a VMware-type approach will make this easier...

Friday 8 October 2010

IPV6 on Ubuntu 8.04 server

In case anyone else is wondering why /etc/network/interfaces fails to configure a static IPV6 address on Ubuntu 8.04, here's the solution...

Sunday 19 September 2010

IPV6 + Cisco 1841 ADSL + Monowall

Got this combination working today after a bit of a struggle...

Saturday 18 September 2010

Wake-on-LAN workaround for Mac Snow Leopard

This article discusses Wake-on-Demand versus "classic" Wake-on-LAN on Mac Snow Leopard.

Saturday 21 August 2010

Stopping random cut-and-paste errors

Recently I've kept finding random bits of text pasted in at random places in the documents I've been editing under Ubuntu Linux.  Today I realised that my new laptop has a middle mouse button, which pastes the contents of the cut-and-paste buffer.  Time to disable that middle mouse button...

Wednesday 18 August 2010

Herefordshire in the sunshine

Took some photos at the weekend, on a short walk around Marcle Ridge in Herefordshire.  I don't know why this part of the country is so empty, as it's lovely countryside to walk in.   Photos below...  Click for full-size images...

Ubuntu Netbook Edition: Consumer-Friendly Linux

Just a quick note in praise of Ubuntu Linux 10.04 "Lucid Lynx" - more specifically their excellent Netbook edition - with a HOWTO for installing it on the problematic Dell C400 laptop.

Friday 9 July 2010

iPhone 4 Frustrations on T-Mobile UK

Finally got my iPhone 4 (unlocked from Apple). Having sold my iPhone 3G to my sister (who is now using it on T-Mobile), I'd been reduced to using an appalling old Motorola, so I was keen to get going with the new phone, mainly because texting on the Motorola is pretty tedious. Only problem being lack of a Micro SIM....

Thursday 3 June 2010

Ubuntu 10.04 LTS - First Impressions

I've been testing this release ("Lucid Lynx") on a Dell Precision M4400 laptop. Initial impressions very favourable. It boots quickly, even with full-disk encryption (via the Alternate Install CD): around 30 seconds to the login screen. Much quicker than MS Windows on the same hardware.

Saturday 15 May 2010

Traverse Viking PCI ADSL card + MONOWALL

I now have one of these cards in a Soekris net5501, in a nice case supplied by Wim at ...

Thursday 13 May 2010

Askozia PBX 2.0: Fix for IAX trunk not working

I'm running a free Asterisk appliance image on a Soekris NET5501 low-power embedded computer.  So far so good: it's simplicity itself to set up (just copy the image to a Compact Flash card and boot).

Wednesday 12 May 2010

HOWTO: Install Ubuntu Linux via PXE Boot

Here's how to do a network-based installation of Ubuntu Linux, for machines without CDROM drives.  It is very simple.

Tuesday 11 May 2010

HOWTO: Install a Soekris server with PXE Boot

The Soekris NETxxxx boards can't boot from CDROM or USB, so installing an operating system requires PXE booting from the network, unless you want to prepare the hard disk or CF card in another machine first.  Another challenge is that the Soekris boards only have a serial console, so you can't use an operating system that assumes a video display and keyboard.  This article outlines your options.

You can use PXE Boot for a wide variety of purposes. My motivation on this occasion was to write a new image the CF card that my Soekris NET5501 AskoziaPBX Asterisk server boots from, without having to unbolt the server from the rack.

Monday 3 May 2010

No-NAT Firewalling with Monowall

Just a heads up for anyone tearing their hair out over this one.

Wednesday 7 April 2010

Full Disk Encryption & PGP email for the Mac

As a security specialist, my own systems need to be secure, so it's my policy that most of my systems should employ full-disk encryption (FDE).  The only exceptions are servers - since these won't restart after a power failure in they use FDE.   I also want to be able to send PGP-encrypted emails, for example for business correspondence, or for bike club membership administration.

FDE provides protection in two ways.  Firstly, if someone steals your computer, they don't get all your files (unless it was up and running with no screen lock password when they stole it).  Secondly, if someone temporarily gains physical access to your computer, it's harder - although by no means impossible - for them to install a trojan to steal passwords or give them a remote shell.