July 2004 - Test - lists.nanog.org

RE: Campus size Wireless LAN
by Eric Brown 21 Jul '04

21 Jul '04

Thanks for the info! That's exactly what I need. -----Original Message----- From: owner-nanog(a)merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Scott Blomquist Sent: Wednesday, July 21, 2004 4:22 PM To: nanog(a)merit.edu Subject: Re: Campus size Wireless LAN > On Jul 21, 2004, at 2:01 PM, Eric Brown wrote: > >> >> Anyone have experience with Proxim's tsunami quickbridge for wireless >> connectivity between buildings at line of site distances under 1 mile? >> It's cheaper than Cisco and looks good on paper. Looking for the good >> bad and ugly. Thanks in advance! >> >> -Eric Just a quick note, I'm running the Proxim AP600 units (Tsunami baby brothers) with great results. 48-54Mb/s for .5 mile shot. Easily remote configurable, quick setup and much cheaper than the Tsunami if all your doing is a quick P2P. my $.02 Scott -- Scott V. Blomquist,A-SA-CN-NRK TINLC(tm) #2598 ITI/Bear&Co Rochester, VT 802-767-3174(v) 802-767-3726(f) "Any technology sufficiently advanced is indistinguishable from Magic." A. C. Clarke

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RE: T1 short-haul vs. long-haul
by Burton, Chris 21 Jul '04

21 Jul '04

I would watch out on the ADSL lines; most carriers I have dealt with in the past on these types of circuits fall under the residential category and there for do not have the same type of SLA's (24x7 support or response window) that say an SDSL business account would. Depending on the required uptime you may want to stick with SDSL (Usually 2.0Mbs Up/Down) if you go with any of the xDSL types of circuits and verify with the Telco that their SLA fit your business needs. Of course if cost is not a object and you require a strong SLA for the circuit I would stick with a T1 or even a reasonably priced Fractional T3 assuming you have or can get the equipment. Chris Burton Network Engineer Walt Disney Internet Group: Network Services The information contained in this e-mail message is confidential, intended only for the use of the individual or entity named above. If the reader of this e-mail is not the intended recipient, or the employee or agent responsible to deliver it to the intended recipient, you are hereby notified that any review, dissemination, distribution or copying of this communication is strictly prohibited. If you have received this e-mail in error, please contact Walt Disney Internet Group at 206-664-4000. -----Original Message----- From: owner-nanog(a)merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Jon R. Kibler Sent: Wednesday, July 21, 2004 9:45 AM To: Andre Oppermann Cc: nanog(a)merit.edu Subject: Re: T1 short-haul vs. long-haul Andre: If your distance for the short-haul is less than 10 miles or so (line-of-sight), I would go wireless. Reasons: a) you can get 10-30MBps on wireless vs. 1.4Mbps for T1. b) if you already have an antenna or other high-point, you can own the wireless network for about what the Telco would charge for a T-1 over about a year. If you really want a wire circuit, for long-haul or short-haul, consider multiple xDSL connections. For example, under the current pricing we are seeing, we can install 8 ADSL circuits for about what one T-1 would cost. With 8 ADSLs, you would be getting >10 Mbps inbound and 2.8Mbps outbound -- equivalent to 8 inbound T-1s and 2 outbound T-1s for the same price as a single T-1. Just some thoughts. Jon Kibler -- Jon R. Kibler Chief Technical Officer A.S.E.T., Inc. Charleston, SC USA (843) 849-8214 ================================================== Filtered by: TRUSTEM.COM's Email Filtering Service http://www.trustem.com/ No Spam. No Viruses. Just Good Clean Email.

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RE: T1 short-haul vs. long-haul
by Hannigan, Martin 21 Jul '04

21 Jul '04

Actually, it has little to do with the techs day. It's all provisioning. At the local mom and pop CLEC, it actually may be the techs day. YMMV. :) DSX indicates a cross connect in the loop. A cross connect is a dumb mechanical device that does nothing except put access points in the "long haul" circuit so that you can troubleshoot in case of an error or failure. The X connect, depending upon interconnect or full cross connect capability, determines how much test, add, drop, or move capability you have. All the cross connect equipment I am aware of is capable of E1/T1. A smartjack is a dumb device as well, just creating a loop when you disconnect from it which enables the telco to test facing themselves. That's why you want one in your cabinet facing them. If you want to insure you are not a TYPE 2 powered drop from the CO or remote, find out what the CLLI code of providers net is and use that as the Z end when ordering. If they don't have equipment and are going to buy a tail circuit, the last mile, give them someone elses mux CLLI and tell them it's a "preferred provider". The CLLI code is almost always printed/taped/labeled on the front of the device. As far as distance goes, I can cover a 150,000 s/f collocation space from one end to the other with shielded ABAM and wire wrap termination blocks. For this purpose, an ethernet cable should be fine for a long ways. :) You can tweak out the LBO if necessary, but you want to do this only if you have to. Messing with the dB levels could be problematic and should be done in conjuction with the provider. -M -- Martin Hannigan (c) 617-388-2663 VeriSign, Inc. (w) 703-948-7018 Network Engineer IV Operations & Infrastructure hannigan(a)verisign.com > -----Original Message----- > From: owner-nanog(a)merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of > Mark Kent > Sent: Wednesday, July 21, 2004 12:40 PM > To: nanog(a)merit.edu > Subject: Re: T1 short-haul vs. long-haul > > > > >> o SmartJack with demarcation point in the office (or same > floor) instead > >> of the building entrance point > > You are not likely going to be able to control that, > it depends on how the install tech's day is going. > Strictly speaking, I believe they are supposed to put > it at the MPOE. > > >> If I am unlucky the T1 gets delivered either directly or > via repeaters as > > You are worrying about this too much. > > Order the T1 (ESF, B8ZS). As you order the circuit specify where you > want it to end up ("server room, 2nd floor") and that you > want an extended > demarc (will cost extra). > > AT install time, make sure someone is around to cajole the installer > into getting the NIU as close as you can to where your router will be. > The installer should test from the extended demarc (make sure > they do). > > Get a standard built-in T1 dsu like as been mentioned in > previous posts. > Plug it into the extended demarc with an ethernet patch cable. > > Now, even though I say to not worry, it is important to remember the > #1 lesson when dealing with telephone companies. I figure it is the > same all over the world, but just in case it isn't, I'll > repeat it here: > > The telco is not your friend. > > -mark >

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DLS Service Simulator
by miyazawa＠brasiltelecom.com.br 21 Jul '04

21 Jul '04

We would like to make a system setup capable to automatically test several points of our network (different BRAS, different DNS Servers, etc), mainly using PPPoE Does anyone have or heard about this kind of "DSL simulator"? -Hamilton DDD para todo o Brasil e DDI para o mundo inteiro. Pense 14, Fale 14, Ligue 14

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Re: T1 short-haul vs. long-haul
by Mark Kent 21 Jul '04

21 Jul '04

>> I don't think standard ethernet pinouts are correct. You want a cable >> with pins 1&2 on one twisted pair and 4&5 on another (7&8 for DDS 56K). Correct has nothing to do with it. Any straight-through cable will work just fine. It's just from the jack to the equipment... and it's already been specified that the extended demarc has been made to the place specified by the customer (i.e., near the router). If you're only going 14 feet (up a wall, across a ladder, down a rack) then you can use silver satin, or just about any straight-through cable you find on the floor or under the tiles or in the trunk of your car. -mark

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Follow the money - Extortion gang caught
by Sean Donelan 21 Jul '04

21 Jul '04

Its easier to follow the money. DDOS gang arrested in Russia. http://news.bbc.co.uk/2/hi/business/3914363.stm The National High-Tech Crime Unit, which led the investigation, tracked down the racketeers by tracing money transfers between the three men and ten gang members who had been arrested in Latvia in November.

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Inexpensive Telephone Conference Bridge System
by Robert A. Hayden 21 Jul '04

21 Jul '04

While this isn't directly networking related, I thought any followups might be of interest so I'm posting here. I'm looking to find a fairly inexpensive piece of hardware that will allow me to set up a easy permanent telephone conference bridge. The purpose would be to allow engineers and managers to call into a fixed rotary number to communicate during network outages. In my perfect world, this widget would simply take some quantity of POTs lines in to the back (maybe 12 to 24) or less-optimum but still workable a channelized T1 or PRI that we could figure out how to mux together ourselves) and bridge everyone together. A password and other things is nice but honestly not important. We use CENTREX systems here so getting POTs drops is easy while channelized services are much more difficult. I'm trying not to do this without a super fancy (and expensive) PBX system. The more turn-key the better. Just set it up and go. We have ideas for hacking something up with a linux box, but I'd prefer something a little more designed for the task. Any ideas? Robert Hayden University of Wisconsin Madison

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Whois/RWhois Server - what is everyone running..?
by Richard J. Sears 21 Jul '04

21 Jul '04

We are looking into the possibility of implementing our own RWhois server as opposed to continuing to provide information via SWIP. I am looking for any advice as to what people are currently running for their whois/rwhois server. I have seen http://www.rwhois.net and actually have it installed and running, but it utilized flat files instead of a backend database, and we have looked at the RIPE whois server as well. Searching Google does not seem to produce a variety of whois/rwhois server software. TIA ! ****************************************** Richard J. Sears

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Network-based Security Solutions
by Josh Fleishman 20 Jul '04

20 Jul '04

I'm currently researching security solutions for the service provider environment and figured I'd query the list for recommendations and real world experiences. I know network security is a rather large topic, so let me try to narrow down my area of interest some.. Network infrastructure protection seems to be the topic of most of the security presentations given at previous meetings, however there's not much information out there regarding host and subscriber protection via the network. Specifically my interests are focused on the netflow based solutions, network appliances (IPS, etc..) and traffic scrubbers. I'm finding it increasingly difficult to weed through all the vendors out there who upon closer evaluation are truly only suited for enterprise/small service provider deployments (less than 1Gbs). Any help in narrowing down my focus along with real world experiences is greatly appreciated. A discussion of router configuration, black-holing, sink-holing, and other types of holing isn't necessary. Also, I'm also interested in hearing any suggested testing methodologies or publications that might assist with the overall selection process. Thanks, Josh

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Script Injection Makes Phishing Harder to Catch
by Henry Linneweh 20 Jul '04

20 Jul '04

A new twise on phishing... http://www.eweek.com/article2/0,1759,1624905,00.asp -Henry

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