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Delay Distribution of Links
by tarun nanog 27 Apr '02

27 Apr '02

Hello, Can anyone tell where can I find delay distribution characteristics of internet links ( for ex. End To End links - West-East Coast). Thanks Tarun _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx

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Re: If you were in a government Cyber-warning center
by Ukyo Kuonji 27 Apr '02

27 Apr '02

>From: Joel Baker <lucifer(a)lightbearer.com> > > C) How deep do you want it? ATT put their #5 TCC cable down 4'; > > no easy task. {But then, we paid for it...}. Will that help > > when a locomotive lands on it? If it doesn't... it's much harder > > to fix. > >The average locomotive is something above 100 tons. > >It's also relatively boxy, nearly flat. Flip it over, cause the front bit >to go do into the dirt, and it will make a *lovely* plow. When I was working for a company that was majorly laying fiber, I had to attend rail safety courses for each rail line that we would be working on. I learned a couple interesting things that I thought I'd share... 1) fiber can not be laid in the rail bed. The bed can not be disturbed. If you think about it, those plows or diggerd disturb the earth, and never compact the earth back to the way it was previously. If this was done in the bed, it would weaken it, and cause the rail line to be undermined (literally) and possible cause a derailment. I forget the exact distance it had to be from teh outer-most rail, but I believe it was in excess of 20 feet. 2) train derailments rarely are the direct cause of fiber cuts. When a train derails, it will only distrub the surface of the ground, but rarely anything over 6 inches to a foot of soil will be distrubed. 3) fiber cuts are usually a result of the cleanup of a derailment. If the train was carrying chemicals, ot the engine's fuel contaminated the ground, the EPA requires that this soil be removed and disposed of in a special facility. Since this can go as far as 6 feet in depth to get all the soil, this is where the fiber is usually cut. If the fiber is not located and marked correctly, or the fiber company is not allowed in to mark it (dangerous spill), the cleanup crew is likely to dig it up with their backhoes. (gas lines suffer fron the same problems as the fiber) 4) Pole mounted fiber is usually disturbed as a direct result of the derailment. Trin hits the pole, pole goes down. Not much can be done about this. After taking these courses, I decided that I was not going to volunteer to go to any sites located on railways. Not because of the fiber cuts, but the other safety issues. Luckially, since I was not on the fiber team, or the sonet (OC192/DWDM) team, it was not required that I go there. YMMV _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp.

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RE: CIA Warns of Chinese Plans for Cyber-Attacks on U.S.
by Rowland, Alan D 27 Apr '02

27 Apr '02

Someone in the CIA is looking for funding... Just my 2¢. -Al -----Original Message----- From: Steve Goldstein [mailto:sgoldste@nsf.gov] Sent: Thursday, April 25, 2002 5:40 AM To: nanog(a)merit.edu Subject: CIA Warns of Chinese Plans for Cyber-Attacks on U.S. I have no idea how real the implied threat may be. Just passing this along. --SG ---------------------------------------------------------------------------- ------------------------------------------------------ Defense: Analysts fear government and private efforts to sabotage federal Internet sites. By ERIC LICHTBLAU Times Staff Writer April 25 2002 WASHINGTON -- U.S. intelligence officials believe the Chinese military is working to launch wide-scale cyber-attacks on American and Taiwanese computer networks, including Internet-linked military systems considered vulnerable to sabotage, according to a classified CIA report. The complete article can be viewed at: http://www.latimes.com/la-042502china.story

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North American: Train Derailment - West of Winnipeg
by Sean Donelan 27 Apr '02

27 Apr '02

>From the "other" part of North America, and country hosting the next NANOG meeting. Fairly major Train Derailment East of Winnipeg. Many Canadian carriers affected, (This is a major 360 condo build) although most have fiber route diversity.

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RE: If you were in a government Cyber-warning center
by Randy Neals 27 Apr '02

27 Apr '02

>Conduit? What's THAT ;-? Only exposed (bridge crossing, etc) >parts are in conduit. Conduit is typically used along the entire length of most railway builds I have seen. Most recent railway builds have been multi conduit projects with up to 12 x 1.5 inch HDPE conduits plowed in by rail mounted cable plow. Your correct that steel conduit is used at bridge crossing or other exposed locations. I understand that when railway routes became popular some years ago for telecom that some railway/telecom companies did some research to understand where to place the cable with respect to the rail to minimize damage in a derailment. Apparently by placing the conduit 3-4' down and relatively close to the rail (ie: 2-3' from the rail) the steel rail will act somewhat as a shield to minimize exposure of the cable in a derailment. (ie: the car has to rip up the trackage and move the dirt to get to the cable) -Randy

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Fwd: [ISN] Hackers exploit Korea to attack global systems
by blitz 27 Apr '02

27 Apr '02

Hmm speaking of the Asian rim: >http://www.koreaherald.co.kr/SITE/data/html_dir/2002/04/26/200204260031.asp > >By Yang Sung-jin Staff reporter >2002.04.26 > >Hackers are increasingly using South Korea as an entry point to attack >computer systems in other countries, a serious situation that could >undermine the country's image ahead of the World Cup finals, experts >and industry sources said yesterday. > >Major international studies show that a large percentage of computer >attacks can be traced to Korea, suggesting that the country's cyber >security system needs an urgent upgrade or overhaul. > >According to New York-based Predictive Systems Inc., Pacific Rim >countries were involved in 91 percent of attacks that weren't traced >to the U.S., which continued to be the leading source of attacks and >target for them. Korea accounted for 34 percent, followed by 29 >percent for China, 10 percent for Japan and 7 percent for Taiwan. > >The National Policy Agency's Cyber Center said the number of hacking >incidents is rising steadily with the World Cup just around the >corner. > >Some foreign servers block access attempts whose origins are traced to >Korea, implying that the country's leadership in the broadband >Internet business may be marred by its negligence in upgrading lame >security protection systems, the center said. > >The center, in charge of cracking down on cyber crime and hacker >attacks, estimated that 22 international hackers broke into 11,222 >server systems around the world between August last year and March >this year. Of 6,287 sites with identifiable origins, 39 percent were >traced to Korea, the center said. > >It said about 4,376 systems in Korea have been the targets of hacking >attempts during the period and the actual damage might have affected >more than 40,000 systems nationwide. > >The police cyber center said Korea was most vulnerable to hacker >attacks, followed by the United States, China, Taiwan, Romania and >India. > >The victims ranged from a major Internet portals to state-run research >agencies to security solutions providers. > >Even a government organization armed with the latest security >solutions was a victim of an attack by sophisticated foreign hackers, >police said. > >According to the center, the average number of hacking incidents in >the year to March was 614, up 20.2 percent from the year-earlier >period. More importantly, a large number of victims did not know their >systems had been attacked. > >Police said its cyber team is chasing 22 suspects whose origins are >outside of Korea in connection with the latest hacking incidents. >Police are tracking hackers' IP (Internet Protocol) addresses and >working with investigators in other countries. > >Police said 18 of the 22 suspects are Romanian and others come from >Australia, Brazil, Germany and Russia. > >"Schools have turned out to be most vulnerable to hackers' attacks >since they care little about their network security and international >hackers are exploiting such school systems," the Cyber Center said. > >Hackers use a variety of techniques to hop from one computer to >another to disguise their location, making it hard for investigators >to trace the criminal activities. > >The reason for the frequent attacks on Korean systems is the country's >fast-growing broadband network. More than half of the nation's >households are now wired to the high-speed Internet network and tens >of thousands of local PC salons are crowded with multi-user network >game users and online stock traders. > >Although the broadband network has advanced by leaps and bounds, Korea >is required to strengthen its security level by adopting advanced >software and solutions to block hacking attempts.

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Re: The Myth of Five 9's Reliability (fwd)
by Jim Hickstein 26 Apr '02

26 Apr '02

> The gap between the rhetoric of five-nines and actual > network performance leads to the conclusion that five-nines > may not be a realistic or even necessary goal. In my experience, the biggest problem is the mismatched expectation: Marketing (getting their data from Engineering) proudly trumpets this performance, but defines it as an AVERAGE over the entire installed base. Each customer, however, assumes it means a guarantee for himself alone. You can't have it both ways. In fact, my employer has analyzed such data from that part of the installed base that reports back home, and in fact they claim 99.999% overall. (I wasn't privy to the definition and selection of outliers, but I'll bet there are some.) Not a network, just a bunch of boxen, but still. And remember: half the population[1] has an IQ below 100. :-) [1] Yes, I know the difference between mean and median, but that's not funny.

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RE: Google doing regional preferencing on results?
by Randy Neals 26 Apr '02

26 Apr '02

Google appears to have the capability to georeference their index by country and possibly with even finer geographic granularity. I noticed that they are now redirecting users to country specific versions of their web page which appears to be done through the various IP address to location tools. Given that Google *seems to know* where the user is, and where the web pages are, perhaps they are now including geographic relevance in the search engine relevancy metrics. Or maybe not! These are only my observations. (I've also noticed that I have had more connection errors recently in initially connecting to the google site and this coincidently started about the time that we began being automatically redirected from the www.google.com to www.google.ca) -Randy -----Original Message----- From: Steve Goldstein [mailto:sgoldste@nsf.gov] Sent: April 26, 2002 12:52 PM To: Avleen Vig Cc: nanog(a)merit.edu Subject: Re: Google doing regional preferencing on results? **If** they cache and replicate, it could be that the caches are not always identical in different places. If they are replicated, perhaps a replication cycle lagged in one of the two locations. --Steve At 5:36 PM +0100 4/26/02, Avleen Vig wrote: >it gives you different >results depending on where in the world you search from.

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Re: root zone file
by Simon Higgs 26 Apr '02

26 Apr '02

At 05:04 PM 4/26/2002 -0400, you wrote: >Anyone know where I can obtain the latest and greatest? I just tried >ftp.icann.org to no avail (host not found.) which is where I used to get >them. >Thanks in advance >Curtis For the USG/ICANN/IANA legacy root, try here: ftp://rs.internic.net/domain/named.ca For the ORSC root, try here: ftp://dns.vrx.net/pub/db.root http://dns.vrx.net/tech/rootzone/db.root Best Regards, Simon -- ###

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root zone file
by Curtis Maurand 26 Apr '02

26 Apr '02

Anyone know where I can obtain the latest and greatest? I just tried ftp.icann.org to no avail (host not found.) which is where I used to get them. Thanks in advance Curtis

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