Re: "Hypothetical" Datacenter Overheating

2024-01-18 Thread Lamar Owen
On 1/15/24 10:14, sro...@ronan-online.com wrote: I’m more interested in how you lose six chillers all at once. According to a post on a support forum for one of the clients in that space: "We understand the issue is due to snow on the roof affecting the cooling equipment." Never overlook the

Re: "Hypothetical" Datacenter Overheating

2024-01-18 Thread Lamar Owen
On 1/17/24 20:06, Tom Beecher wrote: If these chillers are connected to BACnet or similar network, then I wouldn't rule out the possibility of an attack. Don't insinuate something like this without evidence. Completely unreasonable and inappropriate. I wasn't meaning to insinuate an

Re: "Hypothetical" Datacenter Overheating

2024-01-17 Thread Lamar Owen
>This sort of mass failure seems to point >towards either design issues (like equipment >selection/configuration vs >temperature range for the location), systemic maintenance issues, or >some sort of single failure point that could take all the chillers out, >none of which I'd be happy to see in

Re: "Hypothetical" Datacenter Overheating

2024-01-15 Thread Lamar Owen
On Mon, Jan 15, 2024 at 7:14 AM wrote: >> I’m more interested in how you lose six chillers all at once. >Extreme cold. If the transfer temperature is too low, they can reach a >state where the refrigerant liquifies too soon, damaging the compressor. >Regards, >Bill Herrin Our 70-ton Tranes here h

Re: Reminder: Never connect a generator to home wiring without transfer switch

2021-08-30 Thread Lamar Owen
On 8/25/21 11:26 AM, Dave wrote: Back feed is a significant problem but bringing a generator that is not synchronized to the grid can have dramatic results, typically only once This, IMO, is a great thread, lots of good reading here. My $dayjob is at a site where the previous occupants did i

Re: Impacts of Encryption Everywhere (any solution?)

2018-05-29 Thread Lamar Owen
On 05/28/2018 06:13 PM, Matthew Petach wrote: Your 200mbit/sec link that costs you $300 in hardware is going to cost you $4960/month to actually get IP traffic across, in Nairobi. Yes, that's about $60,000/year. I live in the US of A, and this is what 200Mb/s roughly would cost me as well here

Re: Best practices for telcoflex -48VDC cabling & other power OSI layer 1

2016-08-10 Thread Lamar Owen
On 07/18/2016 12:12 PM, Eric Kuhnke wrote: I'm looking for a document or set of photos/presentation on best practices for telcoflex/-48VDC power cabling installation. Labeling, routing, organization and termination, etc. Or a recommendation on a printed book that covers this topic. I apologize fo

Re: Cost-effectivenesss of highly-accurate clocks for NTP

2016-05-16 Thread Lamar Owen
On 05/15/2016 03:16 PM, Måns Nilsson wrote: ...If you think the IP implementations in IoT devices are naîve, wait until you've seen what passes for broadcast quality network engineering. Shoving digital audio samples in raw Ethernet frames is at least 20 years old, but the last perhaps 5 years

Re: Cost-effectivenesss of highly-accurate clocks for NTP

2016-05-16 Thread Lamar Owen
On 05/15/2016 01:05 PM, Eric S. Raymond wrote: I'm not used to thinking of IT as a relatively low-challenge environment! I actually changed careers from broadcast engineering to IT to lower my stress level and 'personal bandwidth challenge.' And, yes, it worked. In my case, I'm doing IT for

Re: Cost-effectivenesss of highly-accurate clocks for NTP

2016-05-14 Thread Lamar Owen
On 05/13/2016 03:39 PM, Eric S. Raymond wrote: Traditionally dedicated time-source hardware like rubidium-oscillator GPSDOs is sold on accuracy, but for WAN time service their real draw is long holdover time with lower frequency drift that you get from the cheap, non-temperature-compensated qua

Re: NIST NTP servers

2016-05-14 Thread Lamar Owen
On 05/13/2016 04:38 PM, Mel Beckman wrote: But another key consideration beyond accuracy is the reliability of a server's GPS constellation view. If you can lose GPS sync for an hour or more (not uncommon in terrain-locked locations), the NTP time will go free-running and could drift quite a b

Re: NIST NTP servers

2016-05-13 Thread Lamar Owen
On 05/13/2016 10:38 AM, Mel Beckman wrote: You make it sound like TXCOs are rare, but they're actually quite common in most single board computers. True, you're probably not gonna find them in the $35 cellular-based SBCs, but since these temperature compensated oscillators cost less than a dol

Re: NIST NTP servers

2016-05-13 Thread Lamar Owen
On 05/11/2016 09:46 PM, Josh Reynolds wrote: maybe try [setting up an NTP server] with an odroid? ... I have several ODroid C2's, and the first thing to note about them is that there is no RTC at all. Also, the oscillator is just a garden-variety non-temperature-compensated quartz crystal,

Re: NIST NTP servers

2016-05-11 Thread Lamar Owen
On 05/11/2016 07:46 AM, Baldur Norddahl wrote: But would you not need to actually spend three times $300 to get a good redundant solution? While we are there, why not go all the way and get a rubidium standard with GPS sync? Anyone know of a (relatively) cheap solution with NTP output? Ebay

Re: NIST NTP servers

2016-05-11 Thread Lamar Owen
On 05/11/2016 12:05 AM, Joe Klein wrote: Is this group aware of the incident with tock.usno.navy.mil & tick.usno.navy.mil on November 19. 2012 2107 UTC, when the systems lost 12 years for the period of one hour, then return? ... I remember it like it was only four years ago oh, wait W

Re: NANOG list attack

2015-10-29 Thread Lamar Owen
On 10/26/2015 03:17 PM, Larry Blunk wrote: As Job Snijders (a fellow Communications Committee member) noted in an earlier post, we will be implementing some additional protection mechanisms to prevent this style of incident from happening again. We will be more aggressively moderating posts fr

Re: Ear protection

2015-09-23 Thread Lamar Owen
On 09/23/2015 10:09 AM, Keith Stokes wrote: Since I’m in our colo facility this morning, I decided to put some numbers on it in my little isolated corner with lots of blowers running. According to my iPhone SPL meter, average SPL is 81 - 82 dB with peaks 88 - 89 dB. With SPL that close to th

Re: Rasberry pi - high density

2015-05-13 Thread Lamar Owen
On 05/11/2015 06:50 PM, Brandon Martin wrote: 8kW/rack is something it seems many a typical computing oriented datacenter would be used to dealing with, no? Formfactor within the rack is just a little different which may complicate how you can deliver the cooling - might need unusually force

Re: Thousands of hosts on a gigabit LAN, maybe not

2015-05-09 Thread Lamar Owen
On 05/08/2015 02:53 PM, John Levine wrote: ... Most of the traffic will be from one node to another, with considerably less to the outside. Physical distance shouldn't be a problem since everything's in the same room, maybe the same rack. What's the rule of thumb for number of hosts per switch,

Re: FCC releases Open Internet document

2015-03-12 Thread Lamar Owen
On 03/12/2015 02:02 PM, Rob McEwen wrote: Nevertheless, in such a circumstance, 47 USC 230(c)(2) should prevail and trump any such interpretation of this! (If anyone thinks that 47 USC 230(c)(2) might not prevail over such an interpretation, please let me know... and let me know why?) Found

Re: Unlawful transfers of content and transfers of unlawful content

2015-03-12 Thread Lamar Owen
On 03/12/2015 04:58 PM, Donald Kasper wrote: More then website blocking I've been wondering what this means for spam prevention? That's a pretty interesting thought, and it is pretty well addressed by paragraphs 376, 377, and 378. Basically, the FCC found that spam blocking is a separate

Unlawful transfers of content and transfers of unlawful content (was:Re: Verizon Policy Statement on Net Neutrality)

2015-03-12 Thread Lamar Owen
On 02/27/2015 02:14 PM, Jim Richardson wrote: What's a "lawful" web site? Paragraphs 304 and 305 in today's released R&O address some of this. The wording 'Unlawful transfers of content and transfers of unlawful content' is pretty good, and covers what the Commission wanted to cover.

Re: FCC releases Open Internet document

2015-03-12 Thread Lamar Owen
On 03/12/2015 02:02 PM, Rob McEwen wrote: On 3/12/2015 1:30 PM, William Kenny wrote: NO BLOCKING: A person engaged in the provision of broadband Internet access service, insofar as such person is so engaged, shall not block lawful content, applications, services, or nonharmful devices, subject t

Re: FCC releases Open Internet document

2015-03-12 Thread Lamar Owen
On 03/12/2015 01:28 PM, Lamar Owen wrote: On 03/12/2015 12:13 PM, Bryan Tong wrote: I read through the introduction. This document seems like a good thing for everyone. I'm about 50 pages in, reading a little bit at a time. Paragraph 31 is one that anyone who does peering or exch

Re: FCC releases Open Internet document

2015-03-12 Thread Lamar Owen
On 03/12/2015 12:13 PM, Bryan Tong wrote: I read through the introduction. This document seems like a good thing for everyone. I'm about 50 pages in, reading a little bit at a time. Paragraph 31 is one that anyone who does peering or exchanges should read and understand. I take it to mean

Re: FCC releases Open Internet document

2015-03-12 Thread Lamar Owen
On 03/12/2015 10:58 AM, Ca By wrote: For the first time to the public http://transition.fcc.gov/Daily_Releases/Daily_Business/2015/db0312/FCC-15-24A1.pdf The actual final rules are in Appendix A, pages 283 through 290 (8 pages), although that's a bit misleading, as the existing Part 8 is not

Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality]

2015-03-04 Thread Lamar Owen
On 03/03/2015 08:07 AM, Scott Helms wrote: For consumers to care about symmetrical upload speeds as much as you're saying why have they been choosing to use technologies that don't deliver that in WiFi and LTE? For consumers to have choice, there must be an available alternative that is affordab

Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality]

2015-03-02 Thread Lamar Owen
On 03/02/2015 03:31 PM, Owen DeLong wrote: On Mar 2, 2015, at 08:28 , Lamar Owen wrote: ...it would be really nice to have 7Mb/s up for just a minute or ten so I can shut the machine down and go to bed. How much of your downstream bandwidth are you willing to give up in order to get that

Re: content regulation, was Verizon Policy Statement on Net Neutrality

2015-03-02 Thread Lamar Owen
On 02/28/2015 07:33 PM, Jimmy Hess wrote: On Sat, Feb 28, 2015 at 8:34 AM, John R. Levine wrote: [...] Until yesterday, there were no network neutrality rules, not for spam or for anything else. There still aren't any network neutrality rules, until the FCC makes the documents public, which th

Re: symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality]

2015-03-02 Thread Lamar Owen
On 02/28/2015 05:46 PM, Mark Andrews wrote: Home users should be able to upload a content in the same amount of time it takes to download content. This. Once a week I upload a 100MB+ MP3 (that I produced myself, and for which I own the copyright) to a cloud server. I have a reasonable ADSL c

Re: Verizon Policy Statement on Net Neutrality

2015-02-28 Thread Lamar Owen
On 02/28/2015 02:29 PM, Rob McEwen wrote: For roughly two decades of having a widely-publicly-used Internet, nobody realized that they already had this authority... until suddenly just now... we were just too stupid to see the obvious all those years, right? Having authority and choosing to

Re: Verizon Policy Statement on Net Neutrality

2015-02-28 Thread Lamar Owen
On 02/27/2015 02:58 PM, Rob McEwen wrote: On 2/27/2015 1:28 PM, Lamar Owen wrote: You really should read 47CFR§8. It won't take you more than an hour or so, as it's only about 8 pages. The bigger picture is (a) HOW they got this authority--self-defining it in, and (b) the poten

Re: One FCC neutrality elephant: disabilities compliance

2015-02-28 Thread Lamar Owen
On 02/27/2015 03:12 PM, Mel Beckman wrote: Two pages? Read the news, man. I'd rather read the actual regulations, from the source, in 47CFR§8. They're public. The enforcement won't come from what the news said. You say you haven't read the actual R&O. Nobody in the public sector, or even

Re: content regulation, was Verizon Policy Statement on Net Neutrality

2015-02-28 Thread Lamar Owen
On 02/28/2015 09:53 AM, Rich Kulawiec wrote: ...Spam, the slang term for unsolicited bulk email (UBE), is a form of denial-of-service attack and may/should be treated in the same way as other DoS attacks. ---rsk 47CFR§8.11(d) Reasonable network management. A network management practice is reas

Re: Verizon Policy Statement on Net Neutrality

2015-02-28 Thread Lamar Owen
On 02/27/2015 04:49 PM, Stephen Satchell wrote: So did I. Also, do you recall that the FCC changed the definition of "broadband" to require 25 Mbps downstream? Does this mean that all these rules on "broadband" don't apply to people providing Internet access service on classic ADSL? The FCC reg

Re: Verizon Policy Statement on Net Neutrality

2015-02-28 Thread Lamar Owen
On 02/27/2015 02:14 PM, Jim Richardson wrote: From 47CFR§8.5b (b) A person engaged in the provision of mobile broadband Internet access service, insofar as such person is so engaged, shall not block consumers from accessing lawful Web sites, subject to reasonable network management; nor shall su

Re: One FCC neutrality elephant: disabilities compliance

2015-02-27 Thread Lamar Owen
On 02/27/2015 01:06 PM, Mel Beckman wrote: Section 255 of Title II applies to Internet providers now, as does section 225 of the Americans with Disabilities Act (ADA). These regulations are found in 47CFR§6, not 47CFR§8, which is the subject of docket 14-28. Not having read the actual R&O in

Re: Verizon Policy Statement on Net Neutrality

2015-02-27 Thread Lamar Owen
On 02/27/2015 01:19 PM, Rob McEwen wrote: We're solving an almost non-existing problem.. by over-empowering an already out of control US government, with powers that we can't even begin to understand the extend of how they could be abused... to "fix" an industry that has done amazingly good thi

Re: Verizon Policy Statement on Net Neutrality

2015-02-27 Thread Lamar Owen
On 02/27/2015 09:50 AM, Rob McEwen wrote: btw - does anyone know if that thick book of regulations, you know... those hundreds of pages we weren't allowed to see before the vote... anyone know if that is available to the public now? If so, where? You were allowed to see the proposed rules in the

Re: Verizon Policy Statement on Net Neutrality

2015-02-27 Thread Lamar Owen
On 02/27/2015 09:05 AM, Larry Sheldon wrote: http://publicpolicy.verizon.com/blog/entry/fccs-throwback-thursday-move-imposes-1930s-rules-on-the-internet Cute. Obviously they never watched the Leno segment where a pair of amateur radio ops using Morse code outperformed a couple of teens using

Re: Linux: concerns over systemd [OT]

2014-10-27 Thread Lamar Owen
On 10/27/2014 11:35 AM, Jay Ashworth wrote: I will counter with "you wouldn't be running a "real" distro in that case anyway; you'd be running something super trimmed down, and possibly custom built, or based on something like CoreOS, that only does one job. Well. Hmm, now this one I wasn't

Re: Linux: concerns over systemd adoption and Debian's decision to switch [OT]

2014-10-27 Thread Lamar Owen
On 10/25/2014 04:55 PM, Matthew Petach wrote: Completely agree on this point--but I fail to see why it has to be one or the other? Why can't systemd have a --text flag to tell it to output in ascii text mode for those of us who prefer it that way? It still logs to syslog, and syslog can still l

Re: Linux: concerns over systemd adoption and Debian's decision to switch [OT]

2014-10-24 Thread Lamar Owen
On 10/24/2014 03:35 AM, Tei wrote: I pled the Linux people to stay inside the unix philosophy to use text files. You do realize that the systemd config files are still text, right? As to the binary journal, well, by default RHEL 7 (and rebuilds) do at least mirror the journal output to syslog

Re: Linux: concerns over systemd adoption and Debian's decision to switch [OT]

2014-10-23 Thread Lamar Owen
On 10/23/2014 02:22 PM, valdis.kletni...@vt.edu wrote: On Thu, 23 Oct 2014 13:43:03 -0400, Lamar Owen said: Now, I've read the arguments, and I am squarely in the 'do one thing and do it well' camp. But, let's turn that on its head, shall we? Why oh why do we want eve

Re: Linux: concerns over systemd adoption and Debian's decision to switch [OT]

2014-10-23 Thread Lamar Owen
On 10/22/2014 03:51 PM, Barry Shein wrote: I wish I had a nickel for every time I started to implement something in bash/sh, used it a while, and quickly realized I needed something like perl and had to rewrite the whole thing. Barry, you've been around a long time, and these words are pearls o

Re: The FCC is planning new net neutrality rules. And they could enshrine pay-for-play. - The Washington Post

2014-04-28 Thread Lamar Owen
On 04/28/2014 02:23 PM, Jack Bates wrote: On 4/28/2014 12:05 PM, Lamar Owen wrote: Now, I can either think of it as double dipping, or I can think of it as getting a piece of the action However, as a cable company, comcast must pay content providers for video. In addition, they may be

Re: The FCC is planning new net neutrality rules. And they could enshrine pay-for-play. - The Washington Post

2014-04-28 Thread Lamar Owen
On 04/27/2014 06:18 PM, Jay Ashworth wrote: - Original Message - From: "Hugo Slabbert" I guess that's the question here: If additional transport directly been POPs of the two parties was needed, somebody has to pay for the links. And the answer is: at whose instance (to use an old Bell

Re: Heartbleed Bug Found in Cisco Routers, Juniper Gear

2014-04-12 Thread Lamar Owen
On 04/11/2014 07:16 AM, Glen Kent wrote: VPN, on the other hand, is a totally different world of pain for this issue. What about VPNs? SSL VPN's could possibly be vulnerable.

Re: IPv6 isn't SMTP

2014-03-27 Thread Lamar Owen
On 03/26/2014 08:12 PM, Jimmy Hess wrote: As far as i'm concerned if you can force the spammer to use their own IP range, that they can setup RDNS for, then you have practically won, for all intents and purposes, as it makes blacklisting feasible, once again! Spammers can jump through

Re: why IPv6 isn't ready for prime time, SMTP edition

2014-03-26 Thread Lamar Owen
On 03/26/2014 03:56 PM, Lamar Owen wrote: Most of the phishing e-mails I've sent don't have a valid reply-to, from, or return-path; replying to them is effectively impossible, and the linked/attached/inlined payload is the attack vector. Blasted spellcheck Now that everybody

Re: why IPv6 isn't ready for prime time, SMTP edition

2014-03-26 Thread Lamar Owen
On 03/26/2014 02:59 PM, valdis.kletni...@vt.edu wrote: You *do* realize that the OS vendor can't really do much about users who click on stuff they shouldn't, or reply to phishing emails, or most of the other ways people *actually* get pwned these days? Hint: Microsoft *tried* to fix this with

Re: why IPv6 isn't ready for prime time, SMTP edition

2014-03-26 Thread Lamar Owen
On 03/26/2014 01:42 PM, John Levine wrote: And I also remember thinking at the time that you missed one very important angle, and that is that the typical ISP has the technical capability to bill based on volume of traffic already, and could easily bill per-byte for any traffic with 'e-mail prope

Re: why IPv6 isn't ready for prime time, SMTP edition

2014-03-26 Thread Lamar Owen
On 03/26/2014 01:38 PM, Tony Finch wrote: Who do I send the bill to for mail traffic from 41.0.0.0/8 ? Tony. You don't. Their upstream(s) in South Africa would bill them for outgoing e-mail. Postage, at least for physical mail, is paid by the sender at the point of ingress to the postal ne

Re: misunderstanding scale, SMTP edition

2014-03-26 Thread Lamar Owen
On 03/26/2014 01:09 PM, John Levine wrote: Quite right. If I were a spammer or an ESP who wanted to listwash, I could easily use a different IP addres for every single message I sent. R's, John Week before last I saw this in great detail, with nearly 100,000 messages sent to our users per day

Re: why IPv6 isn't ready for prime time, SMTP edition

2014-03-26 Thread Lamar Owen
On 03/26/2014 12:59 PM, John Levine wrote: That way? Make e-mail cost; have e-postage. Gee, I wondered how long it would take for this famous bad idea to reappear. I wrote a white paper ten years ago explaining why e-postage is a bad idea, and there is no way to make it work. Nothing of any i

Re: why IPv6 isn't ready for prime time, SMTP edition

2014-03-26 Thread Lamar Owen
On 03/25/2014 10:51 PM, Jimmy Hess wrote: [snip] I would suggest the formation of an "IPv6 SMTP Server operator's club," with a system for enrolling certain IP address source ranges as "Active mail servers", active IP addresses and SMTP domain names under the authority of a member. ... As h

Re: IPv6 Security [Was: Re: misunderstanding scale]

2014-03-25 Thread Lamar Owen
On 03/24/2014 09:39 PM, Paul Ferguson wrote: I'll leave it as an exercise for the remainder of... everywhere to figure out why there is resistance to v6 migration, and it isn't "just because" people can't be bothered. I'm sure there are numerous enterprises in the same shape I am in, with signif

Re: Level 3 blames Internet slowdowns on Technica

2014-03-24 Thread Lamar Owen
On 03/23/2014 11:08 PM, Frank Bulk wrote: Not sure which rural LECs are exempt from competition. This is a quagmire;but it boils down to "if the FCC says they're exempt, then they're exempt and have a 'rural monopoly'" (there's a lot of caselaw and a number of FCC Report and Orders (and further

Re: L6-20P -> L6-30R

2014-03-20 Thread Lamar Owen
On 03/20/2014 12:27 PM, Gary Buhrmaster wrote: "Think of the children!" I hear the 2017 edition of NFPA 70 (aka NEC) may require one to turn off the power to the entire household in order to plug in a coffee maker to minimize potential arc flash hazard (just kidding). Gary ROTFL. No

Re: L6-20P -> L6-30R

2014-03-20 Thread Lamar Owen
On 03/19/2014 06:33 PM, Rob Seastrom wrote: It's not the conductor that you're derating; it's the breaker. Per NEC Table 310.16, ampacity of #12 copper THHN/THWN2 (which is almost certainly what you're pulling) with 3 conductors in a conduit is 30 amps. Refer to Table 310.15(B)(2)(a) for derati

Re: L6-20P -> L6-30R

2014-03-19 Thread Lamar Owen
On 03/19/2014 02:05 PM, William Herrin wrote: 50 watts DC. It won't electrocute you (that's AC) but it's the same power that makes a 40 watt bulb burning hot. 802.3af is limited to 15.4W, and 802.3at to 25.5W. The limits for Class 2 and 3 circuits are found in Chapter 9, Table 11 (A and B), of

Re: L6-20P -> L6-30R

2014-03-19 Thread Lamar Owen
[Whee. This discussion is good for me, as I need to refresh my memory on the relevant code sections for some new data center clients.thanks, Bill, you're a great help!] On 03/19/2014 12:24 PM, William Herrin wrote: Yet an 18 awg PC power cable is perfectly safe when plugged in to a 5-20R

Re: Fusion Splicer

2014-03-19 Thread Lamar Owen
On 03/19/2014 09:20 AM, Eric Dugas wrote: We have the 70S, it's pretty awesome. We paid around $15K CAD new. You might want to look for the 12S or 19S if the price is an issue. I believe you can also find them refurbished. We have a 17S, and are very happy with it. We paid a little more than

Re: L6-20P -> L6-30R

2014-03-19 Thread Lamar Owen
On 03/19/2014 09:51 AM, William Herrin wrote: Nobody is talking about putting an L6-20R on a 30 amp circuit. OP was talking about putting an L6-30P on a 20 amp appliance: a PDU that has its own 20 amp breaker. Big difference. If the PDU isn't listed for 30A then it's the essentially the same

Re: L6-20P -> L6-30R

2014-03-19 Thread Lamar Owen
On 03/18/2014 09:39 PM, William Herrin wrote: Meh. It depends. Plug that 30 amp power strip into a 20 amp circuit. Try to use more than 20 amps and the main breaker trips. No problem. Plug that 20 amp power strip into a 30 amp circuit. Try to use more than 20 amps and the strip's breaker trips.

Re: GPS attack vector

2013-01-17 Thread Lamar Owen
On 01/16/2013 08:06 PM, Jay Ashworth wrote: Do you use GPS to provide any mission critical services (like time of day) in your network? Have you already see this? (I hadn't) http://arstechnica.com/security/2012/12/how-to-bring-down-mission-critical-gps-networks-with-2500/ Hi, Jay, Yes, s

Re: Fiber terminations -- UPC vs APC

2012-11-19 Thread Lamar Owen
On Nov 19, 2012, at 4:37 PM, Jeff Kell wrote: Looking for some guidance/references on the use of UPC versus APC terminations on fiber cabling. Traditionally we have done all of our fiber plant targeting data usage with UPC connectors. We are also looking at proposals for fiber distributi

Re: Attack on the DNS ?

2012-03-31 Thread Lamar Owen
On Saturday, March 31, 2012 04:28:17 PM sth...@nethelp.no wrote: > ANY queries for isc.org and ripe.net are popular (ietf.org has also been > seen), since they give a potentially large amplification factor. FWIW, saw ANY queries at a rate of 10 per second from one IP to a DNS server today, all fo

Re: Programmers with network engineering skills

2012-03-08 Thread Lamar Owen
On Monday, March 05, 2012 09:36:41 PM Jimmy Hess wrote: > > Other common, but misguided assumptions (even in 2012): > > 1. You will be using IPv4. We have no idea what this IPv6 nonsense is. > > Looks complicated and scary. > > 2. 255.255.255.0 is the only valid netmask. ... >(16) The default

Re: Programmers with network engineering skills

2012-02-28 Thread Lamar Owen
On Tuesday, February 28, 2012 09:03:33 AM John Mitchell wrote: > One of the tests I give all interviewees is write a very short program > in a language they have never ever used before I typically recommend either Intercal, or one of various assembler languages that are out of date (well, not r

Re: Programmers with network engineering skills

2012-02-28 Thread Lamar Owen
On Monday, February 27, 2012 05:14:00 PM Owen DeLong wrote: > Who is a strong network engineer > Who has been a professional software engineer (though many years ago and my > skills are rusty > and out of date) Owen, you nailed it here. Even the ACM recognizes that a 'Software Engineer' a

Re: Programmers with network engineering skills

2012-02-28 Thread Lamar Owen
On Monday, February 27, 2012 07:53:07 PM William Herrin wrote: > .../SCI clearance. > > The clearance is killing me. The two generalists didn't have a > clearance and the cleared applicants are programmers or admins but > never both. I just about spewed my chai tea seeing 'SCI' and 'generalist' i

Re: Most energy efficient (home) setup

2012-02-23 Thread Lamar Owen
On Thursday, February 23, 2012 04:53:06 PM Joe Greco wrote: > So, good group to ask, probably... anyone have suggestions for a low- > noise, low-power GigE switch in the 24-port range ... managed, with SFP? > That doesn't require constant rebooting? I can't comment to the rebooting, but a couple

Re: common time-management mistake: rack & stack

2012-02-23 Thread Lamar Owen
On Wednesday, February 22, 2012 03:37:57 PM Dan Golding wrote: > I disagree. The best model is - gasp - engineering, a profession which > many in "networking" claim to be a part of, but few actually are. In the > engineering world (not CS, not development - think ME and EE), there is > a strongly d

Re: Most energy efficient (home) setup

2012-02-23 Thread Lamar Owen
On Wednesday, February 22, 2012 04:13:47 PM Jeroen van Aart wrote: > Any suggestions and ideas appreciated of course. :-) www.aleutia.com DC-powered everything, including a 12VDC LCD monitor. We're getting one of their D2 Pro dual core Atoms (they have other options for more money) for a solar

Re: Common operational misconceptions

2012-02-21 Thread Lamar Owen
On Monday, February 20, 2012 09:07:20 PM Jimmy Hess wrote: > RJ45 is really an example of what was originally a misconception > became so widespread, so universal, that reality has actually shifted > so the misconception became reality. When was the last time you ever > heard anyone say "8P8C con

Re: WW: Colo Vending Machine

2012-02-20 Thread Lamar Owen
On Friday, February 17, 2012 01:44:57 PM Jay Ashworth wrote: > 2) Power cords: C19 to L6-15, C19 to C20, C13 to C20 (latter 2 for 208V PDUs) > (If you don't have your own C13 to L6-15 cords, you're in the wrong biz) An interesting thread. I'd say if you had, instead of a C13 on one end, a

Re: Common operational misconceptions

2012-02-17 Thread Lamar Owen
On Friday, February 17, 2012 01:30:30 AM Carsten Bormann wrote: > Ah, one of the greatest misconceptions still around in 2012: > -- OSI Layer numbers mean something. > or > -- Somewhere in the sky, there is an exact definition of what is layer 2, > layer 3, layer 4, layer 5 (!), layer 7 Misconce

Re: XBOX 720: possible digital download mass service.

2012-01-28 Thread Lamar Owen
On Friday, January 27, 2012 05:56:19 AM Randy Bush wrote: > > Can internet in USA support that? Call of Duty 15 releases may 2014 > > and 30 million gamers start downloading a 20 GB files. Would the > > internet collapse like a house of cards?. > not a problem. the vast majority of the states

Re: DC wiring standards

2012-01-26 Thread Lamar Owen
On Thursday, January 26, 2012 11:29:03 AM Jay Ashworth wrote: > > 'DC Power System Design for Telecommunications" by Whitham D. Reeve, > > published by Wiley, ISBN (print) 97680471681618 and is available in > > the Wiley online library. > > Disappointingly, that book does *not* appear to be in Saf

Re: DC wiring standards

2012-01-26 Thread Lamar Owen
[Digging up an older post; I let a couple of thousand NANOG posts pile up in my NANOG folder] On Tuesday, January 03, 2012 02:40:39 PM Leigh Porter wrote: > Does anybody know where I can find standards for DC cabling for -48v systems? Book Resource that anyone dealing with telecom DC power syste

Re: Steve Jobs has died

2011-10-11 Thread Lamar Owen
On Tuesday, October 11, 2011 04:00:44 PM Douglas Otis wrote: > On 10/6/11 7:26 PM, Paul Graydon wrote: > > On 10/6/2011 4:02 PM, Wayne E Bouchard wrote: > >> In some circles, he's being compared to Thomas Edison. > > It's probably not a bad analogy, like Ford and many other champions of > > indu

Re: Were A record domain names ever limited to 23 characters?

2011-10-07 Thread Lamar Owen
On Friday, September 30, 2011 05:54:38 PM steve pirk [egrep] wrote: > I seem to recollect back the 1999 or 2000 times that I was unable to > register a domain name that was 24 characters long. Shortly after that, I > heard that the character limit had been increased to like 128 characters, > and we

Re: East Coast Earthquake 8-23-2011

2011-08-23 Thread Lamar Owen
On Tuesday, August 23, 2011 06:13:02 PM William Herrin wrote: > B. The crust on the east coast is much more solid than on the west > coast, so the seismic waves propagate much further. Los Angeles > doesn't feel an earthquake north of San Francisco unless it's huge. > New York City felt this earthq

Re: Japan electrical power?

2011-05-11 Thread Lamar Owen
On Wednesday, May 11, 2011 10:08:00 AM Robert Boyle wrote: > I know voltage varies > from town to town and prefecture to prefecture. It seems most is > 90V-110V. Also, part of the country is 50Hz and part is 60Hz.

Re: Cent OS migration

2011-05-09 Thread Lamar Owen
On Monday, May 09, 2011 04:45:36 PM Kevin Oberman wrote: > Depends on what he is doing. BSDs tend to be far more mature than any > Linux. They are poor systems for desktops or anything like that. They > are heavily used as servers by many vary large providers and as the > basis for many products li

Re: [c-nsp] 7600 SXF and IPv6

2011-05-04 Thread Lamar Owen
On Tuesday, May 03, 2011 01:54:00 PM Jay Ford wrote: > On Tue, 3 May 2011, vince anton wrote: > > Anyone has experiemces to share or known v6 issues with SXF (or v4 issues > > with v6 enabled for that matter), or should I be looking at SRC/SRD/SRE for > > 7600 ? > I have 9 6500+SUP720-3BXL boxes w

Re: How do you put a TV station on the Mbone? (was: Royal Wedding...)

2011-04-30 Thread Lamar Owen
On Friday, April 29, 2011 05:16:51 PM George Bonser wrote: > But if "broadcast" events over the internet are treated the same as > "broadcast" events over RF, who cares? They're not; that's the problem. For the US, at least, the Copyright Office of the Library of Congress has statutory authori

Re: How do you put a TV station on the Mbone? (was: Royal Wedding...)

2011-04-30 Thread Lamar Owen
On Friday, April 29, 2011 03:37:04 PM Jay Ashworth wrote: > You've conflated my two points. That would tell the *carriers* who's watching > what, but they probably don't care. I was talking about *the providers* > knowing (think DRM and "3096 viewers online"). And then if there's music, the Sou

Re: quietly....

2011-02-18 Thread Lamar Owen
On Tuesday, February 15, 2011 11:57:46 pm Jay Ashworth wrote: > > From: "Michael Dillon" > > This sounds a lot like bellhead speak. > As a long time fan of David Isen, I almost fell off my chair laughing at > that, Michael: Bell *wanted* things -- specifically the network -- smart > and complic

Re: ISDN BRI

2011-02-17 Thread Lamar Owen
On Thursday, February 17, 2011 10:21:18 am Santino Codispoti wrote: > Is it possible to order a ISDN BRI line from the LEC and have them > look at the design of a DS1 and have them if possible design the ISDN > BRI lineon a devurse path or at lest different equipment within the > CO? As I understa

Re: ISDN BRI

2011-02-17 Thread Lamar Owen
On Thursday, February 17, 2011 10:30:12 am Jay Ashworth wrote: > Off hand, I wouldn't expect a carrier to do any special engineering on > a BRI -- can you even *order* a BRI these days? :-) Seems to still be in NECA Tariff5, at least the last copy I looked at. So the rurals still are tariffed f

Re: IPv6 mistakes, was: Re: Looking for an IPv6 naysayer...

2011-02-12 Thread Lamar Owen
On Friday, February 11, 2011 05:33:37 pm valdis.kletni...@vt.edu wrote: > So riddle me this - what CPE stuff were they giving out in 2009 that was > already v6-able? (and actually *tested* as being v6-able, rather than "It's > supposed to work but since we don't do v6 on the live net, nobody's ever

Re: Failure modes: NAT vs SPI

2011-02-10 Thread Lamar Owen
On Monday, February 07, 2011 04:33:23 am Owen DeLong wrote: > 1.Scanning even an entire /64 at 1,000 pps will take > 18,446,744,073,709,551 seconds > which is 213,503,982,334 days or 584,542,000 years. > > I would posit that since most networks cannot absorb a 1,000 pps attack >

Re: Weekend Gedankenexperiment - The Kill Switch

2011-02-07 Thread Lamar Owen
On Saturday, February 05, 2011 11:29:44 pm Fred Baker wrote: > To survive an EMP, electronics needs some fancy circuitry. I've never worked > with a bit of equipment that had it. It would therefore have to have been > through path redundancy. Surviving EMP is similar to surviving several (dozen)

Re: quietly....

2011-02-04 Thread Lamar Owen
On Friday, February 04, 2011 09:05:09 am Derek J. Balling wrote: > I think they'll eventually notice a difference. How will an IPv4-only > internal host know what to do with an IPv6 record it gets from a DNS > lookup? If the CPE is doing DNS proxy (most do) then it can map the record t

Re: quietly....

2011-02-03 Thread Lamar Owen
On Thursday, February 03, 2011 05:47:44 pm valdis.kletni...@vt.edu wrote: > ETRN (RFC1985) FTW. POP (RFC918), and the current version, POP3 (RFC1081) both predate the ETRN RFC: by 12 and 8 years, respectively. By 1996, POP3 was so thoroughly entrenched that ETRN really didn't have a chance to r

Re: quietly....

2011-02-03 Thread Lamar Owen
On Thursday, February 03, 2011 05:30:15 pm Jay Ashworth wrote: > C'mon; this isn't *your* first rodeo, either. From the viewpoint of > The Internet, *my edge router* is The Node Isn't that where this thing all started, with ARPAnet 'routers' on those leased lines? End-to-end is in reality, th

Re: quietly....

2011-02-03 Thread Lamar Owen
On Thursday, February 03, 2011 03:59:56 pm Matthew Palmer wrote: > On Thu, Feb 03, 2011 at 03:20:25PM -0500, Lamar Owen wrote: > > FTP is a in essence a peer-to-peer protocol, as both ends initiate TCP > > streams. I know that's nitpicking, but it is true. > So is SMTP, by

Re: quietly....

2011-02-03 Thread Lamar Owen
On Thursday, February 03, 2011 02:55:39 pm Jack Bates wrote: > Do you think we have to have a standard for them to implement it? > > If they can ignore the CPE router rules, they can implement NAT66 on > their own, too. See the map66 Sourceforge.net project. Already happening.

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