Untangle Directory Connector Download ((LINK))
Aline Lanosga
I'm very impressed with Untangle and would recommend it to others.With its very robust set of free features, many users won't need to payin order to meet their needs. For more information and a free download,check out www.untangle.com.
Untangle is open-source software. So, you can get it for free. That has been a benefit, especially for the residential users because it is free. The license costs start at $25 a month for some additional features, including higher tiers of security intrusion prevention. The free version comes with intrusion detection, and then the license version has intrusion prevention. It also has some additional things for active directory connectors, etc. It starts at $25 a month to cover 12 devices. Then it goes up from $25 to $50 a month for 12 to 25 devices. That's where it really doesn't scale out per site. If you have a site that has more than 50 devices on it, then Untangle quickly becomes cost prohibitive in comparison to several other competitors. They have a weird per-device licensing model, whereas most firewall vendors simply tell you that this is how many devices we expect you to cover and this is what your licensing costs. They don't tier it by the device. Firewalls have different costs and different licensing. So, in a way, it is the same, but Untangle is more upfront about it. They tell you that if you have X amount of devices, this is what your licensing cost is, whereas other firewall vendors tell you that if you're covering this amount of devices, you need this type of firewall that they make, and it's going to cost you this amount a month, which is going to be more, but the price comparison is definitely not favorable for Untangle once you go over 50 devices. There is an additional cost of the hardware, which you can purchase upfront. You can pay for hardware as a service, or you can deploy it to your own hardware at no additional charge. We can deploy this for free, completely and utterly free and clear, just by simply running a VM and installing the free version of the software on it. So, there are literally no costs to it. The additional costs are basically just completely optional, except in the cases of industries where certain of these other security features are a requirement, but the only costs that you have to pay are the licensing costs. You can choose not to buy their hardware at all and just deploy it in a VM.
We actually have 30 staff, that's why I have 50 licenses. The modules are licensed on a yearly basis, and it's not really expensive. But the only problem is they sell it in a modular form. If you want the web filter, it has its own cost. If you want the captive portal, they sell that too. If you want the active directory connector, it has its own cost. So, if you were to bundle all the modules, it will end up being very expensive.
Welcome to Altium. My name's Chris Carlson, I'm one of the engineers here at Altium. And in this session, I'm going to be talking about system development with a multi-board project. All right. So first we'll talk a little bit about why multi-board, then we'll go through some of the design concerns and I'll give you my take on PCD partitioning and we'll cover connectivity management and connectors and form factors, and then I'll follow up with a detailed demonstration, an Altium designer doing a multi-board project from start to finish.
The electrical interface standards generally support both signal and power on the same connector and many of these standards support high speed signaling. The board form factor templates can be downloaded for custom hardware defined with pre-defined board outlines, pre-positioned connectors and mounting holes and often these are designed to create a nice clean stackable product.
This is something that you need to work out and agree upon early in the design. And then this needs to somehow be documented and maintained as the design evolves. Each subsystem undergoes pin swaps on connectors or signals are added and removed. This has to be communicated across the team and in a well-managed way so you don't end up with crisscrossed or missing signals in the final product.
It's hard enough to get an acceptable signal integrity solution on a single board, let alone from a driver across the PCB through a connector, through another connector on the adjacent board, then across that board to the receiver and the entire signal path has to be considered and analyzed. Connectors often play an important role in signal integrity and the connector manufacturers often provide S-parameter data and analysis tools to simulate the signal path through their connector offerings. Seek out these tools when available.
This image is from an analysis I ran on Samtec's website using their tool Channelyzer. Basically what you do is browse for various families of connectors, which are intended for your specific application then you use this tool to run the analysis with the specific Samtec part number. So this is the result of the analysis I ran with the Samtec tool just right off their website. This will give you some useful insight into the insertion effects of specific connectors.
This is, again, something you should consider in the early stages of the design. Iterating the analysis with different connector options to find the right device to meet your signal integrity needs will drive other areas of the design from 3D modeling to simply the board real estate considerations. So look into signal integrity requirements early on. And Samtec's not the only connector manufacturer with these tools available.
Power integrity. Since most likely be providing the power through the interface, it's another important consideration. Understanding the shielding on connectors you'll be using in the design is critical as well. Return signal and return power pads may impart flow through these shields. And knowing this upfront will give you some guidance to avoid those. Current flowing through the shields can lead to EMI crosstalk and ground loops. So return path currents flowing through shields is something to be avoided.
PDN analyzer. If you're using the Altium power distribution network analyzer and power is being supplied through a connector like an edge connector on a board, that connector becomes this source to the analysis to properly parameterize the connector as a source, you need to know the ampacity of the connector pins, as well as their series resistance, something you can get generally right out of a data sheet.
Then given the loads to the power rails, the tool will reveal to you if you've reserved enough connector pins to source the current required for proper operation of your module or if the connector pins are going to become a giant fuse. Okay. So let's talk about partitioning the board. So there are a lot of reasons to partition the design into a multi-board system.
And it can also allow for low cost customization for the end user. It makes it real easy to come up with a custom product for your customer. Just redesign one module and you've got a new product. So when not to partition. This is pretty easy. When cost reduction is a primary goal, you're reducing connectors, protection circuitry, et cetera. And sometimes just a single board with everything on the board in a reasonable form factor is just the right solution. It just can be a real quick engineering call. And then there's sometimes when the form factor just demands that you don't.
Okay, connectivity management. Now, when you're defining the electrical interfaces, if you can, stick to standards. The standards are there to ensure success. If custom interfaces are required, keep it simple and use mechanical interfaces, connectors which provide the proper signal integrity, impedance requirements. Additionally, some other basic rules of thumb will help drive the system to a successful completion, things like keep signals and processing on the same boards. This'll help with crosstalk and EMI and ground loops.
Consider any high speed and impedance driven design characteristics upfront to make sure the proper interfaces and connectors are used throughout the signal paths. Shorter routing paths are always better. And when it comes to return paths through the interface, more ground pins is always better. More ground pins than you think are necessary probably are.
Now when considering your interfaces, simpler is always better when you can get away with it. Fewer signals crossing the barrier between boards reduces the pin count on connectors hence cost and increased reliability. Fewer signals can come with a trade though in signal integrity. High speed signal interfaces like PCIE will result in fewer signals to manage. However, it will take some consideration on the layout.
PCIE can however utilize edge connectors. So sometimes this comes with a cost advantage because then you only need a real costly connector on one side of the interface. Another really important consideration is where your return paths flow. Not managing your return path can result in EMI, crosstalk and ground loop issues. Cost is always a big consideration. How many signals do I really need? What kind of performance do I need on the interface and what connectors are available and at what cost?
If you can get away with it, also consider rigid flex. This will reduce a potential number of connectors and there can be a potential cost advantage there. So managing the return path across the interface is critical. Keeping the power and signal return path separate is important to minimize the impact of any power supply ripple on the signals, as well as again, reducing crosstalk and EMI issues.
So this is a DDR edge card connector pin out, and we can see an implementation of this methodology. When examining the bus structure, notice there is a ground pin on each side of every signal pin and differential pair and then this is what the layout would look like. Again, you can see a ground pin on each side of every signal and differential pair on the entire interface.
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