Security Corner

Oct 30 2009   2:02PM GMT

Updating the Anti Virus Bootable Thumb Drive

Ken Harthun Ken Harthun Profile: Ken Harthun

My recent post, Convert Any Live CD to a Bootable Thumb Drive in Minutes, referred to the Kaspersky rescue CD as one possible way to make an anti virus bootable USB thumb drive. A lot of people over at my Ask the Geek site have done that and had success with it. However, I have been getting a lot of questions about the updating function, most of them along the line of how to force a static IP address. This should clear it all up.

The Question: Hey Geek, As with the other commenters, thank you so much for this guide and utility. It could potentially be a life saver.

I do however have a few questions:

1) I am guessing the networking side of things works via dhcp, i have looked through the files, but am no linux expert so wondered if there is a way of setting a static ip?

2) Where are the virus deffinition updates saved to? I ran the update on my laptop (dhcp) then plugged the usb drive to a machine with no dhcp and it said the deffinitions were out of date, I would have hope it updated them on the usb key?

My answer: 1. Yes, it works via DHCP. Normally, you would be able to set a static ip address by using the procedure below. You’ll want to get into the linux command console. I believe the rescue disk UI has a link for that. You can then assign a static ip address:

ifconfig eth0 <ip address> up netmask
route add default gw <gateway router address>
ifconfig eth0 down
ifconfig eth0 up
route add default gw <gateway router address>

You can verify the ip address by typing ifconfig with no parameters. It
should show the address you set for eth0.

2. The updates are saved to memory, so they go bye-bye when you reboot.
It’s better to update every time you use it anyway, so you always have
the current definitions. I’ll investigate the ../etc/conf file and see
if I can resolve this.

Hope this helps anyone here who has had similar questions.

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