Tuesday, November 25, 2008

Bittorrent clients that support IPv6



Wikipedia shows a list of bittorrent clients that support IPv6: ĀµTorrent, Bitflu, BitTornado, BitTorrent 6, Bits on Wheels, Deluge, KTorrent, Opera, qBittorrent, TorrentFlux, Tribler, Vuze (formerly Azureus), TorrentVolve and BitTyrant.

That's quite an impressive list. More elaborate than the Sixxs bittorrent client list here.

IPv6 torrent content is here.
I believe Vuze (formerly Azureus) will discover and use IPv6 peers even if the tracker only does IPv4. I guess Vuze uses it's fantastic DHT to discover the IPv6 peers.

The nice thing about bittorrent over IPv6: no more problems with NAT and (the lack of) port forwarding.

Monday, November 24, 2008

Solution for IPv4 address shortage: IPv4 hijacking



Instead of introducing IPv6 to solve a possible IPv4 address shortage, ISPs could just hijack IPv4 address spaces from others.

For example: the "Department for Work and Pensions of UK" has the Class A address space 51.0.0.0 – 51.255.255.255. In other words: 16.000.000 IPv4 addresses for this organisation. See the wikipedia.

Using this 51.x.x.x address space to get 16 million real users online is probably more useful. If the "Department for Work and Pensions of UK" doesn't want to sell that IPv4 address space, I think a BGP engineer at an ISP can decide to start using this for the ISP's users (see here).

The only downside is that there will some kind of split horizon. But connectivity for 16 million users could more important than reaching the few public sites (if any) of a small organisation.

Sunday, November 23, 2008

OpenWRT on WRT54G with aiccu / sixxs: IPv6 speed limited to 4000 kbps




OpenWRT on WRT54G with aiccu / sixxs takes care of my IPv6 connectivity. I just discovered that the IPv6 download speed is limited to around 4 Mbps (instead of my 12 Mbps linespeed). Root cause seems to be the WRT54G CPU load at 100%.

Shock Media IPv6 web hosting


Shock Media does IPv6 enabled webhosting. That's special. It's even more special that you get a 50 Euro coupon / voucher if you arrive on their site via IPv6.

Windows XP can print over IPv6 to Ubuntu Linux

Nice: Windows XP can print over IPv6 to Ubuntu Linux. See the information I've filled out on https://help.ubuntu.com/community/NetworkPrintingFromWinXP

"Windows XP can print over IPv6 to Ubuntu Linux (tested between Windows XP SP3 and Ubuntu Linux 8.10). Make sure both the Windows and Ubuntu have IPv6 connectivity. You should tick "Allow Printing from the Internet" on the Ubuntu machine. Then use the URL (which resolves to IPv6) of the Ubuntu machine as described above."

The result: you can print accross Internet to printers behind NAT-devices.

Arjan's remark: finally we can get rid of faxing machines. ;-)

Question: should we publish the URLs of our IPv6-enabled printer servers here, or will our printer be abused ... ?


First!

http://ipv6.google.com/ is IPv6 enabled!