21Oct/130

Ubuntu 13.10 available

Ubuntu logoSince today you are free to install Ubuntu 13.10 on your VPS or Dedicated Server by using our Customer Control Panel. The main focus on this release was set on improvements for mobile devices. For server environments, it offers the Kernel 3.11 and updated packages.

More information can be found here:

DistroWatch - Ubuntu

Posted by: Paul | Tagged as: , , No Comments
9Oct/130

ASI News

Attention Windows Server users: We released a new installation method for Windows Server operating systems today. It is already available for all VPS and Dedicated Server customers with Windows Server. The first thing you will notice is a much shorter installation time. Our Dedicated Server X with 1 Gbit/s port only took five minutes to finish. Further technical improvements facilitate our administrative work.

We still provide all existing advantages of our automated system installation (ASI) as a matter of course. There will not be any user interaction necessary. Your server will be automatically deployed with the assigned IPv4 and IPv6 address. RDP will be accessible right after the installation. Important security updates will be downloaded and installed over night.

We are now perfectly prepared for future Windows versions. Windows Server 2012 R2 should be available very soon on our servers after its official release.

Posted by: Tino | Tagged as: , , No Comments
7Oct/130

IPv6 now available for all our customers

IPv6We are happy to announce the introduction of IPv6 in our network. IPv6 is the successor to IPv4. Normally, when talking about an ip address, one means an IPv4 address.

An example for an IPv4 address would be 79.143.183.251. An example for an IPv6 address would be 2a02:c200:0000:0010:0000:0000:1231:0001.

IPv6 is entirely optional, meaning you can use it, but you do not have to. For your server, nothing changes - but if you want to, you can activate IPv6 in addition to your existing IPv4 addresses from now on.

Each VPS, each dedicated server and each colocation server has received 65535 (!) IPv6 addresses from Contabo, an entire /112 network. With IPv4, the address space is very limited, considering today's requirements. IPv6 does not have this problem, an enormous amount of addresses exists. We pass this advantage on to our customers: All IPv6 adresses are completely free of charge!

Further details and instructions on how to enable IPv6 on your server have been published in a blog article: http://blog.contabo.com/tutorials/adding-ipv6-connectivity-to-your-server/

Important: You can only reach your server's IPv6 addresses from your local computer if IPv6 is enabled in your local network and with your Internet connection. Otherwise you will not be able to reach them from your computer, even if you have configured everything correctly on your server.

We wish you much success with IPv6!

Posted by: Katharina | Tagged as: , , , , , , No Comments
7Oct/137

Adding IPv6 connectivity to your server

With the recent deployment of IPv6 in our data centre network, newly installed servers should be configured with an IPv6 address out of the box. For existing installations that you do not want to reinstall or colocation devices not installed with our operating system deployment solution, the necessary information needs to be added to your system manually. This guide should give you enough information to get IPv6 up and running on your server.

Obtaining the necessary information

We have already assigned an IPv6 address to every one of your services where applicable. You can find this address in your customer control panel, which should look like this:

ipv6ccp

Do not use the address space shown in the image, "2a02:c200:0:10:3:0:7:1". Use your own IPv6 address space from your customer control panel instead.

At this time, the following additional information is valid for every IPv6 enabled server:

netmask / prefix length: 64
gateway address: fe80::1

For servers with a /64 network starting with "2a02:c205", please use the following IP addresses as resolving name servers:

Resolver/DNS server 1: 2a02:c205::1:53
Resolver/DNS server 1: 2a02:c205::2:53

For servers with a /64 network starting with "2a02:c207", please use the following IP addresses as resolving name servers:

Resolver/DNS server 1: 2a02:c207::1:53
Resolver/DNS server 1: 2a02:c207::2:53

Initial configuration (Linux-based operating systems)

Before adding this IPv6 address to your configuration files and thus making the changes persist after a server reboot, you might want to configure it manually. I will use the IPv6 address 2001:db8::1 in this example. Please replace it with the appropriate address assigned to the server in question. If your network card is not eth0, you will have to replace "eth0" with the appropriate value, too.

Add the address to the server's network interface in the format /:

ip addr add 2001:db8::1/64 dev eth0

You can validate that the address has been enabled by running

ip -6 addr show

which should show, among others, the following lines:

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 2001:db8::1/64 scope global valid_lft forever preferred_lft forever

In order to reach everyone else in the ever growing IPv6 world, add a default route to the server's configuration:

ip route add default via fe80::1 dev eth0

Again, you can verify the setting by running

ip -6 route show

which should show the following output:

default via fe80::1 dev eth0 metric 1024 mtu 1500 advmss 1440 hoplimit 4294967295

You can now check your IPv6 connectivity by using the ping6 command:

ping6 2a02:c205:0:5001::1

Making things persist (Linux-based operating systems)

Different operating systems have different ways of setting up the network configuration. If in doubt, please search the documentation for your operating system. Sample configurations for Debian/Ubuntu and CentOS/Fedora/RedHat will be provided here. Please be very careful when applying these changes. Errors may result in your server no longer responding to any network traffic at all!

Debian / Ubuntu

Edit the file /etc/network/interfaces and add the following lines:

iface eth0 inet6 static
address 2001:db8::1
netmask 64
gateway fe80::1
accept_ra 0
autoconf 0
privext 0

CentOS / Fedora / RedHat

Make sure IPv6 networking is enabled at all by editing /etc/sysconfig/network. Add the following line to this file:

NETWORKING_IPV6=yes

Then add the IP configuration to the file /etc/sysconfig/network-scripts/ifcfg-eth0

IPV6INIT=yes
IPV6ADDR=2001:db8::1/64
IPV6_DEFAULTGW=fe80::1
IPV6_DEFAULTDEV=eth0

This should make sure the IPv6 address gets enabled again after your server reboots.

Configuration steps for Windows Server operating systems

After you have connected to your server using RDP, click on "Start" > "Control Panel" > "Network and Internet" > "Network and Sharing Center". Click on "Change Adapter Settings" on the left side of the window. Right-click the icon for the network connection, select "Properties" from the menu:

IPv6-Windows-1

Highlight the entry "Internet Protocol Version 6 (TCP/IP)" on the list, make sure that the checkbox is ticked and click on "Properties" again. Enter the information you gathered from step one as shown below:

IPv6-Windows-2

Click on "OK", to close the dialogues and save the changes.

Still cannot reach your server via IPv6?

If you have made the changes as described above and if the ping6 command did return a response but you nevertheless cannot reach your server via IPv6 from your local computer, chances are that IPv6 might not yet be enabled in your local network. Your local ISP can help in this case.

Posted by: Markus | Tagged as: , , , , , 7 Comments
4Oct/130

Wiesn 2013

As every year Contabo took part in the annual Oktoberfest. It is nearly a must for a Munich company to join the biggest fair of the world.
Dressed in traditional clothes we left our office towards the Hofbräu-Festzelt (one of the big tents).

The atmosphere was great. Besides beer (one of the main reasons to join the Oktoberfest) delicious food has been served.

In the following you will find some impressions of our funny evening (our faces has been made unrecognizable):
Contabo WiesnContabo WiesnContabo Wiesn Contabo WiesnContabo WiesnContabo WiesnContabo WiesnAs a thank you for the great evening we bought a gingerbreadheart for one of our managing director. In the name of all Contabo employees we say thank you again.
Contabo WiesnOur boss - always in action 🙂
Contabo Wiesn

Posted by: Katharina | Tagged as: , , , , No Comments