Category Archives: Networking

Port Forwarding with xinetd

In some network environments, where for example administration lans or some private lans are deployed, it might still be necessary to access a specific port of a machine inside that lan from the outside. Commonly, you would have to access … Continue reading

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Persistent IUCV Network Devices

On mainframes, Inter User Communication Vehicle provides a means to exchange data between two guests in z/VM. Some time ago, this has been one of the preferred networking methods between two Users (virtual machines) on z/VM. From a linux perspective, … Continue reading

Posted in Mainframe, Networking, udev, z Linux | Tagged , , | Leave a comment

DRBD and Network Restarts

Using drbd as a simple and reliable alternative to distributed block devices is quite common. Especially in primary/primary mode, it provides the possibility to host block devices for virtual machines on two different hosts. However, there is one annoyance that … Continue reading

Posted in block devices, DRBD, Networking | Tagged | 1 Comment

Xen or KVM

Since little more than half a year, I am in the process of installing a new virtualization Platform. One of the hardest decisions to make was if we should use Xen or go with KVM. We already have Xen in … Continue reading

Posted in block devices, KVM, Networking, openSUSE, Xen | 1 Comment

Xen Networking with VLAN

When deploying virtual machines in network environments that are setup with several VLANs, it may be a good idea to provide the virtual Host with the necessary tagged VLANs. It is possible to untag the respective vlans in the controlling … Continue reading

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