Basically, a 6to4 is a system that allows IPv6 packets transmitted over IPv4 network (IPv4 Internet). (see: http://en.wikipedia.org/wiki/6to4)

First, we need to create a tunnel device. You need to install iproute package if you haven’t already

$ sudo aptitude install iproute

Create a tunnel device

$ sudo ip tunnel add tun6to4 mode sit remote any

Calculate your IPv6 address reserved to your IPv4 address. Yes, if you have a public IPv4 address you already have a IPv6 address reserved for you.

$ export MYIP=173.45.232.146
$ printf "2002:%02x%02x:%02x%02x::1\n" $(echo $MYIP | sed -e "s%\.% %g")
2002:ad2d:e892::1

Edit your /etc/network/interfaces file and add your 6to4 device

auto tun6to4
iface tun6to4 inet6 v4tunnel
        address 2002:ad2d:e892::1
        netmask 16
        gateway ::192.88.99.1
        endpoint any
        local 173.45.232.146 #fits address

::192.88.99.1  is a special anycast address that points to the nearest 6to4 router. And assuming that router is working, get your new device up

$ sudo ifconfig tun6to4 up

You may now enjoy your IPv6 connectivity. For example:

$ ping6 -c 4 www6.ulak.net.tr
PING www6.ulak.net.tr(2001:a98:10::36) 56 data bytes
64 bytes from 2001:a98:10::36: icmp_seq=1 ttl=51 time=228 ms
64 bytes from 2001:a98:10::36: icmp_seq=2 ttl=51 time=224 ms
64 bytes from 2001:a98:10::36: icmp_seq=3 ttl=51 time=224 ms
64 bytes from 2001:a98:10::36: icmp_seq=4 ttl=51 time=224 ms
 
--- www6.ulak.net.tr ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3000ms
rtt min/avg/max/mdev = 224.013/225.013/228.013/1.732 ms

References:

• http://en.wikipedia.org/wiki/6to4
• http://tldp.org/HOWTO/Linux+IPv6-HOWTO/configuring-ipv6to4-tunnels.html
• http://wiki.debian.org/DebianIPv6

Related Posts

• Search Your Man Pages: apropos 2009-05-15
• Simple Network Setup On VirtualBox 2.1 2009-03-29
• RHCE oldum 2007-12-01
• Where Is My Ctrl+Alt+Backspace? 2009-05-08
• VirtualBox 2.2 is Announced 2009-05-04

For example:

$ apropos ethernet
ethers (5)           - Ethernet address to IP number database
ethtool (8)          - Display or change ethernet card settings
sk98lin (4)          - Marvell/SysKonnect Gigabit Ethernet driver v6.21

or;

$ man -k ethernet
ethers (5)           - Ethernet address to IP number database
ethtool (8)          - Display or change ethernet card settings
sk98lin (4)          - Marvell/SysKonnect Gigabit Ethernet driver v6.21

The real problem here is (for me at least), “apropos” is real hard word to remember itself and it’s a bit ironic when you think of its purpose. So I think, may be writing a post about it helps me to remember it better.

Related Posts

• Simple Network Setup On VirtualBox 2.1 2009-03-29
• Setting Up a 6to4 Tunnel In Debian 2009-08-24
• Where Is My Ctrl+Alt+Backspace? 2009-05-08
• RHCE oldum 2007-12-01
• VirtualBox 2.2 is Announced 2009-05-04

Ok, there is a logic behind the idea, but what about giving user the freedom of choice?

Long story short, you can re-enable the beloved key combination, just edit your /etc/X11/xorg.conf and add the following lines:

Section "ServerFlags"
	Option "DontZap" "False"
EndSection

Related Posts

• Search Your Man Pages: apropos 2009-05-15
• Simple Network Setup On VirtualBox 2.1 2009-03-29
• Setting Up a 6to4 Tunnel In Debian 2009-08-24
• VirtualBox 2.2 is Announced 2009-05-04
• RHCE oldum 2007-12-01

But, the point is, with 2.2, a new interface type comes: Host-Only Interface (with many other bugfixes and new features, offcourse). And so my post about “Simple Network Setup On VirtualBox 2.1” is obsoleted. Just select the Host-Only Interface option on your virtual machine settings.

PS. By default, virtual box runs a dhcp server serving 192.168.56.0/24 network to host-only interfaces. You can alter the default from VirtualBox Preferences.

Related Posts

• Simple Network Setup On VirtualBox 2.1 2009-03-29
• Setting Up a 6to4 Tunnel In Debian 2009-08-24
• Search Your Man Pages: apropos 2009-05-15
• Where Is My Ctrl+Alt+Backspace? 2009-05-08
• RHCE oldum 2007-12-01

After trying and seeing the mess on setting up network properly on virtualbox-ose, i was a little bit disappointed. But as VirtualBox 2.1, they seem to fix lots of problems with network utilization.

Here is my status;

• I’ve using 64bit Ubuntu Intrepid Ibex on my Thinkpad T61P with 4GB memory
• I’m using my notebook both at work and home, and some other places off course
• At work, I use wired and wireless connection (eth0) but at home I’m using wireless (ath0)
• So there is always different network setups at home, office, etc.
• All my running guests and the host should be able to communicate each other.

So I need static IP utilization on all guests and the host, and all of my guests should access to internet, and all my guests should isolated from lan. So I tried host interface and

• When I use eth0 to bridge, my guests was not reachable at home because eth0 link is not used.
• When I use ath0, there was another problem which I don’t remember now :)
• On both interfaces, my guests were not isolated, and could be reached from lan.

And here is my solution:

On host machine

First I’ve installed bridge-utils

$ sudo aptitude install bridge-utils

I add bridge interface br0

sudo brctl addbr br0

Then I’ve configured my /etc/network/interfaces (at host machine)

auto br0
iface br0 inet static
	address 192.168.5.1
	netmask 255.255.255.0
	bridge_maxwait 0
	bridge_ports lo

Please pay attention to bridge_ports line, I’ve used loop back device so the bridge will be isolated from my lan, and using eth0 or ath0 or anything else will not make any difference as loop back interfaces is will always stay there.

Finally I’ve restart my network and bring br0 up

$ sudo /etc/init.d/network restart

On Guest Machine

Before booting one of my debian guest, I’ve added two interfaces.

• First Interface, which the guest uses to reach to lan:
  • Adapter Type: PCNet-Fast III
  • Attached to: NAT
• Second Interface, which the guests communicate each other and the host
  • Adapter Type: PCNet-Fast III
  • Attached To: Host Interface
  • Host Interface: br0

Then I’ve booted my guest, enter the GUI and edit /etc/network/interfaces file

auto eth0 #This is the NAT'ed interface
iface eth0 inet dhcp
 
auto eth1 #This is the bridged interface
iface eth1 inet static
	address 192.168.5.2
	netmask 255.255.255.0

Restart the network

$ sudo /etc/init.d/network restart

On my other guest, I make the same and gave 192.168.5.3 as IP address.

At the end:

• All my guests can reach each other and the host in 192.168.5.0/24 network
• I do not need any special configuration on host boot.
• I have also a Windows XP guest which I configured the network on same basis and work flawlesly.

Good luck.

Related Posts

• VirtualBox 2.2 is Announced 2009-05-04
• Search Your Man Pages: apropos 2009-05-15
• Setting Up a 6to4 Tunnel In Debian 2009-08-24
• Where Is My Ctrl+Alt+Backspace? 2009-05-08
• RHCE oldum 2007-12-01

Umarım yazacak o kadar şey varken ben yazmamaya devam etmem.

Not: İstatistiklere göre yıl aşırı yazıyorum. E bu yıl benim yılım o zaman.

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debian sen bizim herşeyimizsin.

Elbette benim için ileride fayda sağlayabilecek bir şey bu ne olursa olsun. Bu nedenle eğitim isteğimi sorgusuz sualsiz kabul eden ve karşılayan Parkyeri‘ne de tekrar teşekkürler.

Related Posts

• Setting Up a 6to4 Tunnel In Debian 2009-08-24
• Search Your Man Pages: apropos 2009-05-15
• Simple Network Setup On VirtualBox 2.1 2009-03-29
• Where Is My Ctrl+Alt+Backspace? 2009-05-08
• VirtualBox 2.2 is Announced 2009-05-04

Click here to view the embedded video.

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Şimdi ise sadece arşivlerde görebiliyoruz bu güzide siteyi. Ne diyelim, umarım bir an önce online olur da nimetlerinden faydalanmaya devam edebiliriz.

Eskiyi yad etmek isteyenler; buyurun buradan yakın:

• http://web.archive.org/w….112/http://www.googleityoumoron.com/

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Ne ola ki acep diye biraz kurcalayınca Peter Ryan, Alex Gorbatchev‘in %100 javascript tabanlı syntax highlighter’ını almış, wordpress plugin’i yapmış ve ben henüz aradığımın bile farkında değilken karşıma çıkarmış.

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