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Comment: Re:Avoid the wall-mount, and here's how I did it. (Score 3, Interesting) 402

by Alan Evans (#39852943) Attached to: Ask Slashdot: Building A Server Rack Into a New Home?
Here here on avoiding the wall mount rack. I didn't run quite as many cables as this poster but I did run 2xCAT6, 2xCAT3 and 2xCOAX to each location.

In the basement I hung a piece of 2'x4' x 3/4" plywood on the wall with some cement screws and then got a surface mount CAT6 12 port punch block. A 8 way coax splitter with terminator caps. A signal amplifier and a small unmanaged gigabit switch. I haven't actually terminated the phone lines as I don't have "land line" phones anyway. I just ran the CAT3 since I was already in the walls. To hold up a "server" (purpose built PC) I bought (from a big box home improvement store) a set of "heavy duty" adjustable shelf brackets and 2x9" deep shelf.

My motivation for going all "PC" grade stuff was that I did not want the power consumption of enterprise/datacenter class equipment. My "server" has a 300W PSU in it which is enough to drive the CPU, Mobo, drives and a few other accessories but it should be operating at about 80% capacity which is where most PSUs run most efficient. As for the switch I just bought a little 8port d-link gigabit switch which uses a 5v 1.0A wall wart. My next endevor is to plug each device in to a Kill-A-Watt to how much power each actually uses.

"Server" specs:
Mobo: Gigabyte GA-Z68X-UD3H-B3
CPU: i5-2500k (No OC)
RAM: 16G DDR3
HDD: 4x (1x Samsung 7200.12, 3x Samsung 7200.11) (Had to RMA one of my 7200.11s and got a 7200.12 as replacement.)

Links (for references, not endorsements)
Cat6 12 port punch block: http://www.amazon.com/Tripp-Lite-N250-012-Mount-Feedthrough/dp/B000HZES42
8 Way Splitter: http://www.amazon.com/Philips-PH61046-8-WAY-Cable-Splitter/dp/B0009A3IXW
Terminator Caps http://www.computercablestore.com/Coaxial_Termination_Cap_catID3984.aspx

My 2c.
-Alan

Comment: Re:partimage? (Score 1) 133

by Alan Evans (#37658110) Attached to: Ask Slashdot: Create Custom Recovery Partitions With FOSS?
I have not used partimage in a long time either but I had great results when I did. I imaged a couple hundred WindowsXP boxes without problems. The biggest thing I ran into was having to set the sector offset in the bootloader when a partition moved from one place on a box to another. Another that I had a lot of luck with though not as 'pretty' as partimage is ntfsclone which is part of ntfsprogs. -Alan

Comment: Rules and Rapid Net (Score 1) 374

by Alan Evans (#37453416) Attached to: Ask Slashdot: Clever Cable Management?
Some rules and technologies my company has adopted:

Between racks
1. Raised floor for air only, high ceilings for air buffer and room for overhead wiring, hot and cold aisle partitioning including doors at the end of aisles
2. Power in conduit immediately above racks
3. Cable ladders above power for Cat6, cable bundles are zip tied to ladders every second or third cross rung
4. Fiber trays above cable trays for fiber
5. Run cables from the rack to a row of 2 post rack w/ patch panels in a network cage
6. Run cables from devices in another parallel row(high density line cards etc) to more 2 post racks in the first row via ladders running parallel and perpendicular to rows
7. Use horizontal runs between rack and device patch panels to patch racks to infrastructure
8. Dedicated 2 post racks for telco DMARC gear in another row again, perpendicular cable ladders between rows
9. Clearly label everything using wire wrap labeler

In the racks
1. Use appropriate lengths for everything, fiber, patch and power
2. Label everything using wire wrap labeler
3. Use velcro straps as in rack cabling can change more frequently

In specific we use RapidNet, you order pre terminated modules that you clip into 19" panels, they come terminated, tested and strapped in bundles of 6. Once your cable ladders and trays are up you know how long your runs are.
http://www.hellermanntyton.us/rapidnet
Some good pictures in: http://www.hellermanntyton.us/media/documents/LITPDDCS.pdf
Check out page 9 for some similar to what I described above w/ different racks/cross connects.

Comment: Re:It's a scanner people can use (Score 3, Insightful) 835

by Alan Evans (#37323532) Attached to: Why the Fax Machine Refuses To Die
This is exactly right. Try teaching a 55+ yr old accountant or bookkeeper when he/she should use black&white vs color, 150 vs 300 vs 600 dpi and the difference between JPEG, TIFF and PDF. Then teach them how to enter their email address on the network scanner printer using only the number keys then how to forward that email without sending it to 500 other people accidentally and without blowing up email quotas. - OR - you can teach them to put the original in the feeder, punch in a phone number, press send.

The truth is even many fax machines have different photo/text settings, contrast settings, quality settings but no one other than us IT types ever considers those.

Comment: Possible Solution (Score 1) 97

by Alan Evans (#37257724) Attached to: Mac OS X Lion LDAP Vulnerability Emerges

My company uses OpenLDAP for user authentication in the datacenter and ran across a strange problem that seems very similar to this. It was present in at least OpenLDAP 2.4.16. We tracked it down to a weird problem in the password policy overlay. If I recall right it was the password policy overlay was returning a successful response to updating the last failed login time attribute but that was being passed up and causing binds to return true also. Our solution was to remove the password policy overlay and we have not gone back to revisit it.

I do not know if OpenLDAP in Lion uses the password policy overlay but if it does it would be an easy test to disable it and see if the problem persists. I post here because I don't really feel like registering to a Mac related forum that I will only post once on. I hope someone finds this and finds it useful.

Comment: Multiple Layers (Score 1) 497

by Alan Evans (#31386900) Attached to: Coping With 1 Million SSH Authentication Failures?
1. Worry about securing Drupal, Joomla and Wordpress first...
- or -
2. Use a VPN and hardware firewall
- or -
3. Use iptables 'recent' or 'limit' modules
- or -
4. SSH keys
- or -
5. Find a managed service provider to do 1-4 so you can worry about managing the sites (check out Secure-24.com maybe)

Comment: ISP's, Online song Purchases - Not the solution (Score 1) 818

by Alan Evans (#12214702) Attached to: Music Industry Drafts Code of Conduct for ISPs
The solution to the problem is not offering legal ways of getting digital music nor is it to force ISPs to prevent it. Much research goes to show that the harder you close your fist the more that slips through your fingers so to speak. Those who disagree will rebel!

The problem is the way the music industry is run. The result is a prisoner's dilemma[wikipedia] where the consumers and the artists are on the losing end of the equation.

I would assert that most people who download music are not against the artists making money off of their works. I would put forth that the problem is disdain for the system by which the recording industry makes most of the profit.

If the music (and for that matter movie industry) were structured so that everyone involved made a fair share of money and fair prices were offered everyone would benefit. No more prisoner's dilemma. Consumers get variety of music at a reasonable price, the recording industry makes money and so do the artists. But alas capitalism at work...

Just an aside, I criticize capitalism but only in its practiced form. I am not a communist, fascist or anything the like. I simply believe that capitalism can be run in a way where everyone gets a good deal.

It's been a business doing pleasure with you.

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