Archive for 'Networking' Category

Ganeti 2.6.2

By jbayer - Last updated: Friday, December 21, 2012

RPMs for RHEL6/CentOS6/SL6 are available here:     Also, I’ve uploaded my set of scripts which I wrote and use in administering Ganeti. They are available at: I’d appreciate any feedback.  Suggestions, patches, etc are welcome. This is a description of the scripts: The following are additional shell scripts to support the use of […]


Adding a bridge interface to Linux

By jbayer - Last updated: Thursday, March 1, 2012

A bridge is a way to connect two Ethernet segments together in a protocol independent way. Packets are forwarded based on Ethernet address, rather than IP address (like a router). Since forwarding is done at Layer 2, all protocols can go transparently through a bridge. Among other reasons, if you are running KVM or Xen, and you […]


Simple port redirection

By jbayer - Last updated: Wednesday, August 3, 2011

The mail provider where I work is an Exchange-only provider, and refuses to have anything to do with anything else.  What this means from a security perspective is that they have none, at least in regards to IMAP or SMTP.  From a practical point, in addition to the Exchange ports, they only have the standard […]


How to setup a bridge on Redhat, CentOS, or Scientific Linux

By jbayer - Last updated: Thursday, July 14, 2011

This has been tested on a RHEL 5.6 system.  These instructions should work on any clone.  While not tested, they should work on any 6.0 system as well.   These instructions are taken from the following page, with some additions:     Assuming that the NIC the bridge is to connect to is eth0: […]