Technical Resources for Technical People

Author Archives: techblog

If you’re virtualizing DirectAdmin on a XenServer installation, you may wish to add additional ip addresses to the xenserver hypervisor as a gateway before proceeding. However, adding an additional IP to DirectAdmin from a different subnet gateway is also quite similar. Using the DirectAdmin control panel to add a new ip address only works if the …
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Adding different subnet IP’s to Xenserver

January 5th, 2012 | Posted by techblog in Linux | Virtualization - (1 Comments)

Depending on your datacenter allotment of IP addresses, you may be required to use the xenserver hypervisor as a gateway in order to provide different IP subnets to your underlying virtual machines. Our particular installation uses our datacenter “gateway/primary” IP as the xenserver management interface IP address on xenbr0. All other datacenter IP allotments will …
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Manage a Dynamic Remote IP in iptables firewall automatically

November 22nd, 2011 | Posted by techblog in Linux - (1 Comments)

Having a backup server (or any other server) behind a dynamic IP is quite common; and for us it’s no different. Which of course we treat this off-site server like any other – it must communicate with our master servers through a strict set of firewall rules. (We can’t put enough emphasis on the importance …
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Openfiler rsync over SSH

July 13th, 2011 | Posted by techblog in Linux - (1 Comments)

Openfiler is a nice bit of software for a NAS box, but when it comes to setup and configuration you’re pretty much left on your own. There’s no good documentation (even the paid user manual is quite vague – it only describes the various checkboxes and fields and how to navigate the UI). The openfiler …
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SATA Direct Local Disk Access on Xenserver

July 8th, 2011 | Posted by techblog in Linux | Virtualization - (43 Comments)

There are several reasons why you may wish to attach a physical disk to your existing Xenserver installation, in our case we use it for both a permanent storage solution as well as moving large sets of data around (such as copying out virtual disks or data intensive backups). It’ll treat the SATA (or better yet eSATA) …
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