Monday, 1. August 2011
Some of the early groups of articles I penned on this blog, were comparisons of Open Source Groupware projects. At that time, the only one I could really recommend was eGroupware. Although I still believe eGroupware is a valid contender for your Groupware server, I have discovered a project, that in my opinion is leaps and bounds ahead of the pack. The project is called SOGo.
Thursday, 3. February 2011
At a ceremony today, February 3, 2011, the last five /8s were delegated to RIRs. For most people, this has little meaning, but to us that make our livings from the IPv4 protocol, and who have spent countless years learning the tricks of the trade, this marks an end of an era.
As for me, I’m ready for the ‘big switch’ to IPv6. But I know many of my friends and colleagues that have procrastinated, claiming this day would never come, or are waiting for a vendor to swoop in and save the day. Well, to those I say, WAKE UP! The companies you work for, and the customers you service will be greatly effected by the IPv4 shortage and the logical adoption of IPv6. The day is at hand, and vendors stand to make their money by just selling the upgrades to their equipment to handle IPv6, so I don’t think a magic bullet is in the cards. As of now, the best solution for your company to look at is dual stack. In as short a time as a year, you could have customers that are unable to reach your web based services, or only able to connect at modem speeds to them, due to overloaded proxies. I strongly suggest you start working on this now, especially if you have outward facing services such as a web server or email server.
That’s it for now, I’m busy preparing for the Southern California Linux Expo. This year it will be held at the Hilton LAX on February 25-27, 2011. Look forward to seeing you all there!
– Stu
Monday, 1. November 2010
Looks like the bad guys were up to no good again this weekend. SIP based PBX operators reported a huge increase in bogus registration attempts against their systems over the Halloween weekend. Our hosted PBX farm experienced this increase first hand. Logs showed an attack from a new and unique IP address about every minute. At the end of the weekend, over 1300 unique IP addresses were logged.
Friday, 2. July 2010
Back in December `09, my company ACT USA, began testing IPv6. These tests quickly advanced to our production environment. Over the last six months, I have been in the process of setting up native IPv6 connectivity for all our data centers. This connectivity is based on the dual stack model. This article attempts to cover the technology available, and the choices I made based on that technology.
Monday, 7. June 2010
I recently was asked to put together a brief web presentation on the different methods of creating redundant networks. I couldn’t think of a better place to put it, then right here on my blog. After all, I was overdue for a post anyways…
A redundant network is two or more distinct paths for data to travel to and from an upstream network. In it’s simplest form, it can be a piece of equipment that can be manually placed into service easily upon a failure. More often though it is set up so that any single device or connection can fail, and without user intervention, a backup system or connection will automatically step in and take over the job of the failed device, or connection. A redundant network does not mean that no mater what happens, your data will still be reachable. There are many factors that need to be considered, ranging anywhere from your providers, to your applications, that can cause a failure.
Monday, 19. April 2010
Shortly After my “SIP Brute Force Attack Originating From Amazon EC2 Hosts” post, Dave Michels interviewed me for an article Dark Side of the Cloud. This is that interview:
Dave:Â Â What do you believe the intent was of the attacks? Free long distance?
Stu: Certainly free long distance would be one reason… But there are many other reasons to hijack a SIP account. I’m sure that organized crime would pay for a block of active SIP logins. They could use them to circumvent surveillance, or possibly use them for fraudulent boiler room calls about extended warranties and such.
Remember, most folks still believe that the Telephone System is secure… They tend to believe someone who is calling them.
Sunday, 11. April 2010
I woke up Saturday morning to find strangely high network activity on some of our inbound connections. After a quick review, it turned out that most of the traffic was going into several of our hosted PBX systems. After a little more digging, I discovered that several systems on the Amazon EC2 network were preforming brute force attacks, against our VoIP servers. They were attempting to guess user names and passwords for our SIP clients. I immediately blocked all traffic from the attacking IPs and examined the logs. Thankfully, I found that non of the attacks had succeeded in guessing passwords.
Monday, 22. February 2010
Every February in Los Angeles CA, a group of dedicated volunteers get together to put on what many believe to be the largest all volunteer organized open source technology conventions in the US. This three day event features talks and exhibits specifically targeted at Open Source users, programmers, and system administrators.
Tuesday, 28. July 2009
There are tons of hosted and installable software packages out there that do web content management. Some good, some not so good. Only one thing is certain, you’ll have your work cut out for you if you choose the wrong one.
I’m going to talk about a few of the most popular open source packages that are out in the wild. Each are different, and do things differently. The one that’s right for you, depends on what your endgame is.
Thursday, 16. July 2009
When I was a kid, I could walk down Las Tunas Blvd. and not go more then 3 store fronts without knowing the the business owner’s names. Well, at least their family names, because back then you called people by their last name, usually preceded by a Mr., Mrs. or Miss.
That’s not to say that there weren’t Super Markets and Department Stores. But you still went down to the corner drug store to get your prescriptions, paper and office supplies were purchased from the local stationary store, and small toy stores and hobby shops were where I would go and dream of all the fun I could have for the price of a months allowance.
