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Thank you
by Pete Kruckenberg 04 Jun '03

04 Jun '03

Thank you to everyone who attended NANOG 28 in Salt Lake City. We enjoyed hosting the conference and hope you enjoyed your time in Salt Lake. See you in October. Pete.

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SUMMARY: BGP Analytics
by Timothy Brown 04 Jun '03

04 Jun '03

I want to thank everyone for the volume of responses I received on this topic. I was already aware of the work the Akamai and Sockeye keiretsus were doing with BGP analysis, but thanks for the pointers. I was also familiar with CAIDA's efforts. Nick Feamster and Dave Andersen (lcs.mit.edu) had input on a system they are involved with at http://bgp.lcs.mit.edu/. Zebra is used, with dumps of BGP data in MRTd format. This data is collected and stuffed into a database, which can be plotted or viewed as appropriate. This was, by far, the most common solution presented (with only minor variations). There appear to be several already prebuilt tools designed for dealing with data in MRTd format, both by lcs as well as other groups. Tim Rand (ohsu.edu) suggested Juniper's source- and destination-class-utilization features as effective methods for traffic coming from specific autonomous system paths. Our network isn't Juniper-based, but this is good information. Andre Gironda (eBay) suggested a dump of the BGP update messages using a tool like tcpdump, then replaying them to zebra, presumably to avoid zebra interaction directly with the core network. Several papers were suggested indirectly or directly discussing BGP analysis: http://citeseer.nj.nec.com/andersen02topology.html http://citeseer.nj.nec.com/wang02observation.html http://citeseer.nj.nec.com/pei02improving.html http://citeseer.nj.nec.com/463603.html For those with questions about what I sought to do, I was looking to perform some arbitrary plots of regular expressions over time; show me paths that look like ^AS(x)_AS(y)$ [that are defined as best path] as opposed to ^AS(y)$ [that are not defined as best path] and graph the acceptance of those paths based on other factors (local preference, etc). For instance, if I was choosing transit via AS(x) for destination AS(y), even though I was directly connected to AS(y), i'd want to know for how many paths I was doing that for. In an ideal world, this data would be available via SNMP (for easy integration with existing toolsets). There are, of course, a ton of other analyses people want to do with BGP (some of which are even getting done). I've decided to build my own toolset for these purposes, building on the work of the concepts presented above. If you are an interested developer or would like to contribute some time to developing such an open-source toolset, please contact me off-list. Thanks again for all the input. Best regards, Tim

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AC/AC power conversion for datacenters
by Matthew Zito 04 Jun '03

04 Jun '03

Hello, This is marginally related to the power discussions earlier, but does anyone know of a product that steps up 120V AC to 220V AC and is reasonably datacenter-friendly? We're looking at an environment where there's no 220V available - but we only need ~7 amps so conversion could be possible to my high-school-physics mind. I've found some products that seem to be appropriate, but they're geared towards a more industrial purpose. Is there a rackmount 120->220V converter that people out there have used and would recommend? Thanks, Matt -- Matthew Zito GridApp Systems Email: mzito(a)gridapp.com Cell: 646-220-3551 Phone: 212-358-8211 x 359

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Pesky spammers are using my mailbox
by Stephen J. Wilcox 03 Jun '03

03 Jun '03

Hi, seems some spammers are using one of my personal domains as the from field in their emails, the local-part being random so I cant easily block it. Has anyone any advice on tracking them down and making them stop? All I get are the bounces, some include the original headers but that usually gives an open relay as the origin. I think I know the answer (you cant do anything) but I wanted to ask as its very annoying and I'm not happy! PS Anyone around at the Sheraton today.. I cant spot anyone looking nanogish! Steve

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Re: AC/AC power conversion for datacenters
by neil＠DOMINO.ORG 03 Jun '03

03 Jun '03

Have a look at www.baytechdcd.com - they +might+ have something. Neil

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Re: pool.ntp.org NTP servers
by wayne 03 Jun '03

03 Jun '03

In <20030603160008.GA15027(a)OZoNE.TZoNE.ORG> Phillip Vandry <vandry(a)TZoNE.ORG> writes: > On Sun, Jun 01, 2003 at 09:41:39AM -0500, wayne wrote: >> >> This seems like a good time to put in a plug for the pool.ntp.org NTP >> servers. This is collection of public ntp servers provided by >> individuals and ISP's placed in a round-robin DNS system. The goal is > > Following other advice earlier in this thread, wouldn't it be better to > hand pick NTP servers that you know you have a symmetric route to? Hi. I've gotten a fair amount of response to my plug for the pool.ntp.org project, however, it appears that I wasn't very clear about what the project is. First off, I'm not in charge of the pool.ntp.org project, so I can't add any servers to the pool. The admin email address you should contact if you can provide a server is: clockmaster(a)fortytwo.ch Secondly, the pool.ntp.org servers aren't all stratum-1, some are even stratum-3 or so. The goal here isn't to provide everyone with the absolute best time standard, but to provide everyone with a good enough time standard that you can just plop pool.ntp.org in without thinking too much about it. Actually, this project started out as a way to try and keep people from abusing stratum-1 time sources by plopping in a fixed list as a default. For example, the Debian Linux distribution now comes with three pool.ntp.org servers picked at random from the round-robin DNS as a default. Since you don't know where in the world or on what networks these Linux installations will be placed, picking three random NTP sites is far better than picking a fixed list or picking nothing at all. People who care about sub 10ms accuracy will go find better time sources, but most people just want sub 1min accuracy. Again, if you can either provide a public ntp server, or you can influence people to use the pool.ntp.org servers instead of abusing other servers, please check out: http://fortytwo.ch/time/ Of course, your users should be using ISP or company specific NTP servers if they can, if they can't, using pool.ntp.org is better. -wayne

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Re: BFD preso
by Susan Harris 03 Jun '03

03 Jun '03

> Will the Bidirectional Forwarding Plane presentation be put online? This > is really valuable stuff but it's hard to see on the video. Sorry - it's there now!

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AS1880 - AS1883 - What are they?
by william＠elan.net 03 Jun '03

03 Jun '03

While we're on the subject of RIPE AS## & whois, could somebody tell me what are 1880-1883, which http://www.cidr-report.org/autnums.html lists as: AS1880 AS1880 Stupi, house man's policy AS1881 AS1881 Stupi, toaster network AS1882 AS1882 Stupi, house woman's policy AS1883 AS1883 Stupi, backboone test network These ASNs regularly announce ip blocks not otherwise present in whois and I wanted to know this is all about? -- William Leibzon Elan Communications Inc. william(a)elan.net

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OT: Next NANOG conference
by Hank Nussbacher 03 Jun '03

03 Jun '03

Please don't schedule the next NANOG for the week of Nov 7 since many of us will want to attend - "The 3rd Annual Nigerian EMail Conference": http://j-walk.com/blog/docs/conference.htm Couldn't help myself, Hank

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Unified table of AS names?
by Mike Leber 03 Jun '03

03 Jun '03

I'm looking for a unified table of AS names or a tool that could be used to generate such a table. The table at ftp://ftp.arin.net/info/asn.txt only provides ARIN registered AS names, using dig NNNN.rdi.int txt only provides ARIN registered AS names as well, using the geektools whois proxy produces things like: Checking server [whois.arin.net] Results: OrgName: RIPE Network Coordination Centre OrgID: RIPE Address: Singel 258 Address: 1016 AB City: Amsterdam StateProv: PostalCode: Country: NL ASNumber: 3154 - 3353 ASName: RIPE-ASNBLOCK4 ASHandle: AS3154 Comment: These addresses have been further assigned to users in Comment: the RIPE NCC region. Contact information can be found in Comment: the RIPE database at http://www.ripe.net/whois RegDate: 1993-12-10 Updated: 2003-04-25 When a check of RIPE shows: # whois AS3320 -h whois.ripe.net % This is the RIPE Whois server. % The objects are in RPSL format. % % Rights restricted by copyright. % See http://www.ripe.net/ripencc/pub-services/db/copyright.html as-block: AS3154 - AS3353 descr: RIPE NCC ASN block remarks: These AS numbers are further assigned by RIPE NCC remarks: to LIRs and end-users in the RIPE NCC region remarks: Please refer to these documents remarks: <http://www.ripe.net/ripe/docs/ir-policies-procedures.html> <http://www.ripe.net/ripe/docs/asnrequestform.html> <http://www.ripe.net/ripe/docs/asnsupport.html> admin-c: CREW-RIPE tech-c: OPS4-RIPE mnt-by: RIPE-NCC-HM-MNT mnt-lower: RIPE-NCC-HM-MNT changed: hostmaster(a)ripe.net 20010423 changed: hostmaster(a)ripe.net 20011024 changed: hostmaster(a)ripe.net 20011120 changed: hostmaster(a)ripe.net 20020408 source: RIPE aut-num: AS3320 as-name: UNSPECIFIED descr: Deutsche Telekom AG descr: Internet service provider operations ...more stuff... Which while you could write a hacked up script that scans for the first description line after finding an aut-num line that was an exact match, leave you wondering questions like is the as-name field unused in the RIPE database (unlike the ARIN database)? I figure there are several people out that that all must have solved this problem independently, perhaps one of them would share? :) :) :) Mike. +----------------- H U R R I C A N E - E L E C T R I C -----------------+ | Mike Leber Direct Internet Connections Voice 510 580 4100 | | Hurricane Electric Web Hosting Colocation Fax 510 580 4151 | | mleber(a)he.net http://www.he.net | +-----------------------------------------------------------------------+

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