I have v6.1.4.7 running. The firewall is turned off in the toolbox menu, but a new section appeared "Intrusion Detection" with the 6.1 update (although the previous firmware was pretty old) which as yet I don't seem to be able to turn off, seems to do the trick, it lists several things it blocks some of which it has counts against.

If anyone is interested, I have found DSL Depot a good place to get stuff from, it's all refurb stock, the proces are low but everything I have ever had from them has need perfect, but in slightly damaged boxes.

I really feel like I lucked out with this router, I went for it as I figured it would have the Alcatel chipset in it, and my DSLAM card is also Alcatel, I get an extra 1Mbps over the 2wire router I used before. I also find it's rock solid, I never loose sync and my line is a little less than perfect, I really must get around to sorting that out one of these days, I think I have a split pair

Edit - Not sure what you mean about the BT firmware? I downloaded mine from speedtouch.co.uk the only custom firmware BT release these days is for their own routers, and BTW avoid the BT HomeHub (shudder!) if you can.

Cheers

Cris.