Yealink IP Phones: contents of LCD via webpage
by lunarg on November 20th 2018, at 12:23

A nifty little feature of the Yealink IP Phones the ability to display the contents of the LCD via the management page.

Access the web management page, and after authenticating, change your browser URL to http://IP_of_phone/screencapture. Refresh the browser to update the capture.

This works on the following models: SIP-T48G, SIP-T46G, SIP-T42G, SIP-T41P, SIP-T29G, SIP-T28P, SIP-T27P, SIP-T26P, SIP-T23G, SIP-T23P, SIP-T22P, SIP-T21P E2.

 
HP 3PAR default passwords
by lunarg on November 19th 2018, at 11:07

The following default passwords are used for HP 3PAR storage systems:

UsernamePasswordUsed for
3paradm3pardataManagement port (MGMT) for admin control
Setupusr / root(blank)SP initial default credentials (before config)
Spvar3V#rparSP default credentials (after config)
3parcust3parInServSP default credentials, meant for customers to use
 
Updating the vCenter Server Appliance via ISO and CLI
by lunarg on October 26th 2018, at 13:29

You can easily update your vCenter Server Appliance (VCSA) offline by downloading a product patch ISO and via the CLI.

Download the latest patch from VMware Patch Download Center. Select VC from the Search by Product drop-down menu, then select the correct version (i.e. 6.0 or 6.5). Download the patch ISO and attach it to the VCSA.

Log in to the shell (using SSH or VMRC) and initiate the update:

  1. Stage the ISO updates:
    software-packages stage --iso --acceptEulas
  2. Optionally, you can view the list of packages to be updated:
    software-packages list --staged
  3. To install the updates, run:
    software-packages install --staged

After the update has finished, you will have to reboot the VCSA.

 
Barracuda NG Firewall: exclude Apple Appstore from AV scanning
by lunarg on October 22nd 2018, at 10:35
Barracuda NG Firewall has a comprehensive anti-malware and anti-virus scanning engine. Unfortunately, this clashes with the Apple Appstore: downloading apps and updates get blocked by the AV scanning engine. In order to resolve this, the URLs from Apple need to be excluded.

Using NGAdmin, log on to the firewall (or Control Center), navigate to the Virus-Scanner service of the firewall, and open the Virus Scanner Settings configuration node.

Click on Content Scanning and under the HTTP Multimedia Streaming section, add a new Scan Exception.

Enter a name for the exclusion, then enter these values:

Allowed MIME-Types: add the value *

Domain: *.apple.*

Setting the allowed MIME-type to * is  ...
 
VMWare: mark all optical drives as client
by lunarg on September 27th 2018, at 11:38
It is best practice not to have an ISO mounted on a VM if it is not necessary. This is especially the case with VDI: if you forget to set the optical drive back to client, each of your desktops will have the ISO mounted as well, which can create a hassle with dependencies on the datastore where the ISO is located.

With PowerCLI, you can quickly resolve the matter with this one-liner:

Get-VM | Get-CDDrive | Where {$_.ISOPath -ne $null} | Set-CDDrive -NoMedia -Confirm:$false

For VDI, note that this will not work for replicas and master images containing snapshots, as the dependency remains intact if a snapshot exists where the ISO was still mounted. In that case, it is better to clone the m  ...
 
Add/remove network routes in macOS
by lunarg on September 27th 2018, at 10:35

Similar as on FreeBSD and Linux, you can add/remove static network routes through the command line with the route command. The syntax somewhat differs from Linux, though.

To add a route (e.g. subnet 192.168.3.0/24 to gateway 192.168.1.254):

sudo route -n add -net 192.168.3.0/24 192.168.1.254

To remove a route:

sudo route -n delete -net 192.168.3.0/24

To show the current route table, you can use netstat:

netstat -nr
 
macOS: reset folder view for all folders
by lunarg on September 27th 2018, at 10:15
Folder view preferences are stored separately in a hidden file called .DS_Store in each folder. If you want to reset the folder view options to the default settings, you can use Terminal to do a search for those files and remove them.

To remove them in your home folder, you can run this:

find ~ -name ".DS_Store" -delete

Note that you can also do this on network shares. Just adjust the search path accordingly.

Suppose you have a share mapped to smb://server/data, then you would type:

find /Volumes/data -name "*.DS_Store" -delete

Caution
Be very careful with this command. It will not ask for confirmation!Making a typo (like forgetting to add the -name parameter) could result in permanent  ...
 
Backup switch configuration to TFTP (CLI reference)
by lunarg on August 24th 2018, at 15:14
In case of disaster, it is usually a very good idea to periodically back up the configuration of your network switches. This article lists syntax for backing up configuration to a TFTP server for different vendors.

In the syntax examples below, the IP for the TFTP is 1.2.3.4, and we're writing to the file switch.cfg.

Note that this article is definitely not complete. If you have additions to this article, please post them in the comments.

The syntax for Dell and Cisco switches is mostly the same. For N-series and PowerConnect, a summary is displayed which needs to be confirmed, which is not the case for Cisco and Dell S-series.

For Cisco Small Business (SF- and SG-series), the CLI ne  ...
 
 
 
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