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3rd thursday - 7pm @ f5 Networks

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Next Meeting

Meetings have been cancelled until further notice.

Interested in presenting? Let us know.

When and Where

Meetings are held at 7 p.m. on the third Thursday of the month.

Location: F5 Networks on Seattle. The address is 401 Elliott Avenue West.

Use the NORTH entrance of the building off the courtyard, look for f5 and SeaBUG signs. The building is secured (locked) so do not hesitate to knock loudly to gain entrance.

Important newcomer tip...

Neither the SOUTH entrance nor the parking garage at f5 should be used. Be sure and come around to the NORTH entrance off the courtyard and knock loudly to gain entry.

On-street parking is free and (usually) plentiful on Elliott and the adjacent side streets east of the building.

Detailed directions are available.

Typical Agenda

6:30 - early setup for machines and speakers.
7:00 - 7:20 announcements and introductions
7:20 - 8:20 main presentation or group discussion of chosen topic(s)
8:20 - 8:45 talk amongst yourselves
8:45 - meeting over please exit the building

Past Meetings

May 19, 2005

Network Security Monitoring -by- James Affeld
Monitoring your network for security issues is a must in the modern virus and worm filled world. James will discuss 4 sources of indicators and warnings of hostile network traffic and some tools to collect and analyze them. He'll also introduce a console setup that ties them together.

March 17, 2005

Advanced SSH Usage -by- Brooks Davis
Theory and operation of SSH including protocol basics, password-less authentication, port forwarding, and proxy connections.

January 20, 2005

Unix Documentation Formats -by- Jeremy Reed

November 18, 2004

Applied DNS -by- Mark Foster
This presentation was about operating a DNS server running BIND 8 or 9, with emphasis on the topics of recursion, delegation, security, best-practices and troubleshooting.

Mark is a system engineer for VeriSign Naming and Directory Services, and since 2000 has been a primary caretaker for the .CC, .SR and .TV domain name registries.

October 21, 2004

A Technical Introduction to Mac OS X -by- Leon Towns-von Stauber
This talk provides a technical overview of Mac OS X, including its open-source Darwin core and Mac OS X Server. It examines the differences between OS X and other UNIX variants, particularly FreeBSD, and how it came to be that way.

Leon has been using and administering UNIX systems since 1990. He has contributed to "Mac OS X in a Nutshell", "Mac OS X for Unix Geeks", and "Using Samba", and is currently working as a full-time system admin.

September 16, 2004

X Window Managers
Short informal demonstrations of various window managers were given.

August 19, 2004

Firewalling with IPFilter -by- Mark Rosnick
This talk was an overview of IPFilter capabilities and tools, installation issues and system tweeks, rule processing including advanced features, and an example rule set for a fully functional yet extremely secure DMZ network.

Mark is a Unix Systems Administrator in Seattle, WA. He previously worked for Widevine Technologies where he was responsible for installing and managing numerous different firewalls and packet filtering bridge nodes, including rewriting the entire corporate rule sets for Check Point's Firewall 1.

July 15, 2004

Grid Computing With FreeBSD
After years of development by the High Performance Computing (HPC) community, grid computing has become one of the hottest buzzwords in technology today. This talk will discuss what a HPC grid is, some of the technologies in involved in building one, and how one can be built in a FreeBSD environment. The challanges in porting Globus to FreeBSD will also be discussed (the issues should apply to most other packaging systems).

Brooks Davis is a researcher and system administrator focusing on high-performance computing and high-performance networking. He is also a FreeBSD src and ports committer.

June 17, 2004

Jeremy C. Reed, a NetBSD developer, showed us some of the features of pkgsrc. pkgsrc is a portable package building system for Linux, NetBSD, Darwin, Mac OS X, Irix, SunOS/Solaris, AIX, HPUX, BSD/OS, FreeBSD, Windows and other operating systems for managing nearly 5000 software suites. It provides:
1) a categorized collection of specifications that help automate fetching, checking checksums, patching, configuring, building, installing and packaging software suites;
2) package installation and maintenance tools (like pkg_add, pkg_info, pkg_delete and others).

May 20th, 2004


April 15th, 2004

Jonathan Mini, a FreeBSD developer, discussed how the Perforce software-configuration management (SCM) / version control system "helps alleviate problems with sub-projects that are larger than a few simple changes (e.g. weeks or months of work that remains uncommitted to the main tree and is the collaborative work of more than one developer) and how it improves the efficiency of the equivalents of 'cvs update'."

March 18th, 2004

Mark Foster gave a presentation on Exim which covered installation, configuration and using various mechanisms like DNSBL, spam & virus filtering and STARTTLS. The slides are available here

Douglas Kirkland presented on SpamAssassin. The talk covered how to create custom rules and scoring.

February 19th, 2004

Informal discussion. No presentation.

January 15th, 2004

Phil Nelson spoke about Coda and demonstrated its use.

December 18th, 2003

Brooks Davis gave a presentation about building a high-performance computing cluster using FreeBSD. The paper the presentation is based on and the presentation itself are available at:

November 20th, 2003

FreeBSD committer Jeff Roberson gave an excellent off-the-cuff presentation on the FreeBSD kernel, including architecture and some of the design roadmap. FreeBSD committer Jonathan Mini also made contributions to the presentation.

October 16th, 2003

At long last, we finally recommenced organized meetings in Seattle, at f5 Networks. Thanks to everyone who made it happen! The meeting was informal, with introductions by everyone, pizza and some lively discussion.

The Catacombs

Our first meeting was held on February 2nd, 1999.

Here are some photos of one of the first meetings in April of 1999.

Here are photos from the bbq held in September of 2000.

The last known meeting prior to 2003 was at the SpeakEasy Cafe in November 2000. Six months later, a fire broke out that torched the Cafe

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