Entradas etiquetadas como networking

Basic network bridge configuration for a laptop running Debian


In many different situations, mainly related to virtualization or containers, a basic linux bridge configuration is needed, typically defining br0 connected to the first Ethernet interface, eth0 (no, I don’t like predictable network interface names ;) ). In such a case, a basic configuration of “/etc/network/interfaces” must be similar to:

auto lo 
iface lo inet loopback

iface eth0 inet manual

auto br0
iface br0 inet dhcp
  bridge_ports eth0

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Playing around with OpenStack: Using an instance as a router


Neutron is an OpenStack project to provide “Networking as a Service” to other OpenStack components, mainly to nova. Neutron allow users to define or use networks, subnetworks, routers, DHCP servers, etc. in a very powerful and easy way.

Neutron routers are linux network namespaces, allowing multiple isolated environments defined in the same network node. These routers are managed via neutron API and the users don’t have direct access to them. This is fine for most cases but there can be others where deeper control is needed, in this post we’re going to show how to use an OpenStack GNU/Linux instance as a router, which initially it’s not allowed.

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