Chris Wolfe's blog

In praise of IPCop

Here are runPCrun we use a lot of equipment - servers, routers, switches, workstations, if it has a plug then chances are we've opened the box, took a good sniff and installed it.

Since we have a large amount of clients it is good sense for us to standardise on what we use to make our life easier. One of the most important thing to standardise is the firewall. Our choice of firewall needs to have the following features:-

Affordable - it would be hard for us to recommend our SOHO clients to spend £1000's on expensive kit - they'd simply refuse. Also, we have seen firewalls that come with features locked unless you pay extra license fees. One firewall we replaced for a new client actually only had room for 3 port forwarding rules!

Flexible - Every client is different. Some clients have multiple internal machines on non standard RDP ports, some have FTP servers with strict IP lists. Once client wanted to block port 25 from all machines except one. The firewall we choose can do all of these and if not, chances are somebody has written an open source module that can be installed.

Easy to Manage - We have seen some firewalls that can require you to go on a course just to add a simple port forwarding rule. Of course, you do need to know what you're doing when working on any firewall but a easy to understand user-interface goes a long way to help. Our firewall has a simple GUI and if you want to get your hands dirty, a full command line interface.

Stable - You need a firewall that measures it's uptime in months and years not hours and minutes. Our choice has been running in some installations for over 5 years without a single problem. Now that is staying power.

The firewall of our choice is IPCOP  It's free and it's fantastic!!

We use old P3 based Dell's but for our clients we like to use small mini-ITX based units for increased reliability. These cost approx. £300 + VAT which for our clients is reasonable. We have lost track of the number of times we have taken on a new client and found a complex, over specced firewall in place. Firebrick, Watchguard all good products but a nightmare to manage so they quickly find a new life on ebay or we simply chuck them.

Optiplex 745, TPM and Bitlocker

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Installing Vista and Activating TPM with Bitlocker

The Premium version of Vista comes with a new feature called Bitlocker. This encrypts the whole disk partition and offers protection from out of operating system data compromising. For extra security this technology can be enabled with something called TPM, or Trusted Platform Module,  a chip on the motherboard that can securely store and generate encryption keys. Here is how I installed such a set up recently for a security minded client.

Since we are a Dell reseller, I purchased a new Dell OptiPlex 745 desktop which comes with a TPM chip.

TPM & OptiPlex 745

Now, the first issue - To activate BitLocker, the system needs to have it's disk partitions set up in a certain way which the Dell website simply did not offer. The disk needs to have a small unencrpyted boot partition and a large OS partition which will be encrypted.

Rather than worry about how the OS would be delivered, I ordered the PC without an OS and ordered a copy of Vista Ultimate OEM 

Once the PC was unpacked and set up, the first task is to switch the TPM chip on in the system BIOS. This is a two stage process. Once you enter the BIOS, locate the "Security" tab and turn TPM on. There is another setting called "Activation" which must be enabled as well. Save the BIOS and reboot. You should get a warning that the BIOS TPM settings have been modified - this is OK, so select "Modify" and continue. Now, I recommend going back into the BIOS and double checking the TPM chip actually is on as the first time I did, for some reason it wasn't and you will get an error later.

Now reboot with the Vista disk in the DVD drive. Since my harddisk was empty, I was able to create the partitions in the way recommended by Microsoft. A good page to visit and recommended reading for the whole process is the Microsoft technet site  article - Windows BitLocker Drive Encryption Step-by-Step Guide

Cannot install New USB devices

A client asked me to take a look at their new Dell Dimension 3100 computer which was refusing to allow them to transfer their photographs from their camera.

The first thing I tried to do was plug in my generic USB flash drive which contains all of our software toolkit.

Cannot Install SP2? Stuck on "Checking Product Key"

I recently had a Dell D505 laptop in the workshop that refused to install Service Pack 2. Each time, it just stopped on "Checking Product Key"

The product key was correct but it could get no further - the Update process would then use 100% of the CPU and had to be closed manually.

After searching the net, I found a few other users with the same problem and generally the solution was to reinstall Windows with SP2 slipstreamed into it already. Since this was already a fresh install after a hard disk failure, I was not keen on this plan.

0x00000051 after Windows 2003 SP1 upgrade

We recently had a client who applied Windows 2003 Server Service Pack 1 on their Dell Poweredge 420SC server. On reboot, they were greeted with the dreaded blue screen of death (BSOD) with the error message.

STOP 0x00000051 (REGISTRY_ERROR)

The server would then reboot and then do it all again. Safe mode and Last Known good configuration made no difference.

After searching the net, it turns out that this is a known problem on older Dell Poweredges that have had a factory install of Windows on.

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