Create a Snapshot of a vApp with vCenter and PowerCLI

To my surprise the ability to snapshot an entire vApp is only available in vCloud Director, the feature is not in vCenter (as of 5.5). While not a perfect solution, a similar result can be achieved using PowerCLI. Initially I suspected the parameter would need to be specified…

Creating a HTTP CallerID Lookup Source for FreePBX

PBX in a Flash / FreePBX (and I’m sure most other PBX builds) allow for a Caller ID Lookup Source to be specified. This takes inbound caller IDs, passes them to a service which then returns a meaningful name. Such a system can be implemented extremely quickly using the…

CentOS networking failure following a VM clone

Cloning a CentOS VMware virtual machine will result in the eth0 interface refusing to come up with the following error This is due to the cloned VM being assigned a new MAC address, to resolve the issue the following files need to be updated with the new MAC address and interface…

Using Named ACLs for VTY access

Cisco allows use of extended and named access lists for filtering access to VTY lines. However, still unsupported is the ability to specify destination addresses (ie, the ability to limit VTY access to specific management IP addresses). The destination portion of the ACL needs to…

Services to return text-only public IP

The following sites return the source IP of web requests in plain text with no HTML or other formatting. icanhazip.com ifconfig.me/ip Examples Linux: PowerShell Python Be aware if there are http/s proxies in place the above may not be a true representation of the external IP…

vSphere Web Client Default URL

The vSphere Web Client default port is 9443 Default URL is https://[vcenter_server_fqdn]:9443/vsphere-client/

Detecting Active Windows XP Computers with PowerShell and dsquery

With support for XP ending, the following are two ways to list currently active XP workstations. For Server 2008 R2 and later, using the ActiveDirectory PowerShell module provides nicer output with more detail. For DCs pre Server 2008 R2, similar results can be retrieved with…

Cisco Policy Based Routing

The following can be used to split traffic between two WAN links. It is typically used to provide a mechanism to route based on source rather than destination or to split different types of traffic across different links. Example Network The above diagram illustrates the network…