12/8/2005

Bret McDanel lead a talk on what is asterisk, differences between VoIP and TDM networks.

He started with an overview of the various efforts and products for routing and processing phone calls. The discussion then focused on the various flavors and ways to obtain asterisk. The bulk of the discussion centered on how to configure a phone network to use the various capabilities of asterisk: to screen and process calls, as an answering machine, and as a call router. How VOIP works and how it interfaces with POTS was also covered.

The slides/power point used for the talk can be seen at:

http://www.sacaug.org/system/files?file=what%20is%20asterisk.ppt http://www.sacaug.org/system/files?file=Difference%20between%20TDM%20and %20VoIP.ppt

11/10/2005

The meeting had an open agenda.

We started by exploring the pwd command. It should be pretty straightforward, but there can be some twist. For example, how symbolic links are handled. We looked at the difference between running pwd and /bin/pwd.

Then, we did some reverse engineering on my internet cam. We found, by using the browser, tcpdump, file, emacs and a few other tools, that it generates a nonstandard stream of jpegs with headers that are read and stripped off by a java applet.

9/8/2005

Sean Perry, Brian Lavendar

Comments

It was a good presentation and I learned quite a bit about the uses and limitation of Xen. The discussion of the Perl vs. Java mind set was interesting.

Agenda July 2005

Thurs, June 9, 2005

Agenda June 2005

 Thurs, April 14, 2005
Time: 7-9 PM
Location: ExitCertified

Announcement Presentation
Comments The group found that the documentation provided in the references was incomplete. It didn't state or describe that the encryption algorithm either needs to be compiled into the kernel or loaded as a module. After doing this, encryption other than XOR, in this case serpent, could be used to encrypt the files. The fact that the files could not be read without providing the password during the mounting process was demonstrated.

Thurs, March 17, 2005
Time: 7-9 PM
Location: ExitCertified

Presentation
Comments There were quite a few errors in some of the scripts. The group was able to fix them all, execpt for a line doubleing problem. One of the scripts to find content or keywords in the man pages, was really unnecessary. There are existing functions, apropos and man -k, that do the same thing.

Thurs, Feb 10, 2005
Second Thursday

The agenda is open

Location: ExitCertified
Time: 7 - 9pm

I'll talk a little about the server move/change and mail/lists and changes to the web page.

~Gary

Thurs, Jan 13, 2005
Second Thursday

EtherDrive Storage Blades and the History of Networks and Storage
by brantley@coraid.com

Location: ExitCertified
Time: 7 - 9pm

This talk covers some of the history of disks and networking and how they came together. It also shows how the EtherDrive storage blades are the next step in the evolution of storage. Starting with the work at IBM in the 50's, the development of disk storage technology has advanced non-stop. The advent of Ethernet networking in the 1970's ushered in a new era of storage: keeping disk on one network node and doing the computation on another. This talk will show how IBM channels, fibre channel, SCSI, SMD, ST506 and ATA all fit into history, and how Ethernet continues to affect storage, first with NFS, and iSCSI and now AoE.

Brantley Coile is the CTO of Coraid Inc and along with Sam Hopkins developed the AoE protocol. Brantley has been doing Unix stuff for over 20 years, first with Seventh Edition Unix. Brantley did pioneering work in embedding Unix in the 1980s, and was the first to develop a disk caddy for SCSI disk in 1986. Brantley is also known for the invention of stateful packet inspection and tcp based load sharing network applicance. His products include the Cisco PIX and the Cisco LocalDirector.

Coraid is a new startup founded to provide the most affordable and flexible storage possible to the Open Source community. Coraid's products includes the EtherDrive storage blade, and the RAIDblade RAID front end.

http://www.coraid.com

~brian