Archive for January, 2011

While testing something earlier I needed to create a symbolic link on my laptop which is running Windows 7 Ultimate 64-bit. I first was going to use cygwin to create the symbolic link with ln however cygwin complained about it which is noted below in more detail. After receiving the error from cygwin I decided to look at the possible Windows commands and located mklink which is described in more detail below and will easily allow you to create symbolic links on a Windows 7 computer.

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Earlier today while working with a friend at our offices we were playing around with a large NMAP scan of the anoNet network. His computer would not open the network topology in Zenmap because of a lack of RAM so we were looking at it on another laptop with much more RAM. After discussing it for a little bit we were curious how many hosts had been discovered on anoNet but initially I didn’t see an easy way to get this information. Use the information below for a quick count of hosts in Zenmap discovered via a NMAP scan.

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I don’t know why I have never configured Trillian to block ICQ authorization requests before considering I get a couple every single day however I decided today was the day. ICQ authorization requests pop up when someone has requested to add you to their contact list which for me never happens unless I send someone my ICQ number via email or another form of media. Anyhow below are instructions on how to block those authorization requests from popping up all the time.

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Another task I recently completed for a client of mine was to modify the background image for Polycom SoundPoint SIP phones connecting to the companies VoIP network externally. Depending on the model of the Polycom SoundPoint you can modify the background image that displays on the LCD panel using a URL. In this case the phone type was a Polycom SoundPoint 550 and he phones connecting via an external network were not displaying the background image that was set for phones on the internal network. Below is information on where you can find where the background image is set and an example configuration file that explains what could be changed to have different phones locate the background image on the Polycom SoundPoint SIP phones also known as the home display.

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While working on various things in a Asterisk VoIP deployment earlier I needed to override the DHCP NTP settings for a specific phone because this particular user was remote. The configuration file for their phone was actually using a different outbound proxy and SIP registration server address so they could operate remotely. One of the issues pointed out to me was the fact that the phone’s time was never correct and after some basic investigation I was able to locate the issue which is described below as well as how to override the DHCP NTP address settings via the Polycom SountPoint CFG (configuration) files.

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