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2916 discussions

Re: [swinog] Has Bluewin a DNS Problem
by Tonnerre Lombard 27 Mar '08

27 Mar '08

Salut, Kurt, On Wed, 26 Mar 2008 15:03:40 +0100, Kurt A. Schumacher wrote: > What about the most stupid wanabe Spam-fighter which are very unhappy > as in place (e.g. the third-party service provider systems acting > with some SC subsidiaries...) which high rate valid messages if > certain brain-dead conditions like PTR not matching MX don't match? 2 points about this. 1. it is highly unlikely that these stupid wannabe SPAM filters get the response containing so many PTR records right. It is most likely that either the software blows up or that it only ever considers the entry it receives first. (Most likely the software blowing up will not even be remarked but instead the mail will be rejected silently.) 2. Since a lot of people use personalized domains now in their mail addresses (me(a)first.lastname.ch, bla(a)pascual.garnier.name, whatever), the people who use such a setup will be strongly discouraged very quickly and be forced to drop it, since they want to still be able to send mail, most likely. We should not make such stupid moves just to encourage them to adopt such a setup. > Under the line, it is likely not a DNS issue, but the inability by > some mail or AS systems resolving lists. Suspect my servers will > fail, too. Xaver, pls send private reply for a test from that system, > anytime. It is also a DNS issue, depending on the number of results returned; the size of a DNS/UDP response is limited to 1 UDP packet, which again is limited in size. Not everyone uses DNS over TCP, and it is unlikely to be adapted just because of such a stupid and useless SPAM filtering measure. Tonnerre

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Cisco Security Advisory: Vulnerability in Cisco IOS withOSPF, MPLS VPN, and Supervisor 32, Supervisor 720, or Route Switch Processor 720
by Christian Jouas 27 Mar '08

27 Mar '08

FYI http://www.cisco.com/warp/public/707/cisco-sa-20080326-queue.shtml <http://www.cisco.com/warp/public/707/cisco-sa-20080326-queue.shtml> Seems that some of Swinoggers will have long upgrade nights soon. Chris

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Anyone else lost traffic around 15:10?
by Matthias Hertzog 27 Mar '08

27 Mar '08

Situation is back to normal again, but we saw decreased incoming traffic here. Anyone else? Best wishes, Matthias _________________________________________ mhs @ internet AG Zürcherstrasse 204, CH - 9014 St. Gallen Phone +41 71 274 93 93, Fax +41 71 274 93 94 http://www.mhs.ch _________________________________________

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Has Bluewin a DNS Problem
by Xaver Aerni 27 Mar '08

27 Mar '08

Our System receive ex. This MSG The original message was received at Tue, 25 Mar 2008 16:20:47 +0100 from localhost [127.0.0.1] ----- Transcript of session follows ----- ... while talking to mxbw.bluewin.ch.: <<< 451 No thanks. (How about PTR records?) ... while talking to mxzhh.bluewin.ch.: >>> QUIT <<< 451 No thanks. (How about PTR records?) ... while talking to mxzhb.bluewin.ch.: >>> QUIT <<< 451 No thanks. (How about PTR records?) <niesen18(a)bluewin.ch>... Deferred: 451 No thanks. (How about PTR records?) Warning: message still undelivered after 4 hours Will keep trying until message is 5 days old ********************************************** Xaver Aerni Zürichstrasse 10a 8340 Hinwil Tel. 001 707 361 68 39

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RE: [swinog] Has Bluewin a DNS Problem
by Per Jessen 26 Mar '08

26 Mar '08

Kurt A. Schumacher wrote: > ... >> This is a silly reverse setup. A reverse lookup should only return >> one hostname, not 20. > ... > > Well, tend to agree. > > What about the most stupid wanabe Spam-fighter which are very unhappy > as in place (e.g. the third-party service provider systems acting with > some SC subsidiaries...) which high rate valid messages if certain > brain-dead conditions like PTR not matching MX don't match? Trying to work around them with a dodgy DNS setup is not the right course of action, IMHO. > If this approach works out, it could be considered. It is not illegal. Correct - it's just silly and it doesn't work as expected. 1) a properly working resolver library will return multiple records rotated once for every lookup, so you're never guaranteed to get the same answer to a reverse lookup. 2) most applications, e.g. mail-servers, that do reverse lookups do not expect more than one reply, and will always only process the first one. > It's just against what we are used to over the last 20+ years. Plus it doesn't work. /Per Jessen, Herrliberg -- http://www.spamchek.com/ - your spam is our business.

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Re: [swinog] Has Bluewin a DNS Problem
by Tobias Göller 26 Mar '08

26 Mar '08

Hi Kurt, On 26.03.2008, at 15:03, Kurt A. Schumacher wrote: > ... >> This is a silly reverse setup. A reverse lookup should only return >> one >> hostname, not 20. > ... > What about the most stupid wanabe Spam-fighter which are very > unhappy as in place (e.g. the third-party service provider systems > acting with some SC subsidiaries...) which high rate valid messages > if certain brain-dead conditions like PTR not matching MX > don't match? There are a lot of E-Mail Providers (i.e. gmx) behaving like this already. If A, PTR, MX and HELO are not exactly the same (all four) the message is marked as SPAM. There are pro's and cons for this... I would not rate E-Mails solely because of those four points, but that's only me.... CU Tobias

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chzrh01 opens - first Swiss based SixXS PoP
by Jeroen Massar 25 Mar '08

25 Mar '08

Hi folks, I would just like to spam here also that, with thanks to the nice folks from IP-Man, we have setup and now also opened the first Swiss based SixXS PoP: chzrh01.sixxs.net. It is located at the TIX in Zurich and should have really nice low latencies to most people in Switzerland. For the folks who already have a SixXS account, they have been spammed already with an offer they can't refuse, for everybody else, maybe it is time to start peeking at this when you don't have IPv6 connectivity yet? http://www.sixxs.net/ of course, and for questions don't hesitate to contact info(a)sixxs.net (see also /contact/ on the website). For the folks who didn't gotten the word yet: http://ipv6.google.com exists and works, and also, the Great IPv6 Experiment's testing phase has already begun and it will soon go live, also with non-adult material so that it can reach a much wider audience. Greets, Jeroen

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Yahoo! is looking for a Senior Manager Production operations Europe
by Christian Jouas 25 Mar '08

25 Mar '08

Yahoo! is looking for a Senior Manager Production operations Europe: Yahoo! is looking for a senior manager to oversee the European production operations network, systems and storage (NSS) team. The NSS team is a key part of the larger European productions operations team which has overall responsibility for the commissioning and operation of Yahoo!'s European Datacenter, Server, Storage (online and offline) and Network infrastructure. Full job description on request. Please note this position is based in London ! Thanks Chris -------------------------------------- Christian Jouas Yahoo! Network Engineer Av. Louis Casai 18 1209 Geneva Switzerland cjouas(a)yahoo-inc.com Y!M: cjouas77 P: +41 22 747 7557 F: +41 22 747 7610 M: +41 79 508 2810

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Delayed mail delivery from swissptt.ch ?
by Per Jessen 20 Mar '08

20 Mar '08

On inbound delivery from swissptt.ch, we're seeing an increasing number of of timeouts (both mrz.swissptt.ch and mrp.swissptt.ch) - anyone else seeing the same thing? /Per Jessen, Herrliberg -- http://www.spamchek.com/ - your spam is our business.

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VDSL/Zyxel P2802 HWL not "strong" enough for a small company LAN?
by Olivier Mueller 19 Mar '08

19 Mar '08

Hello, bonjour, I'm not sure it is the right place to ask this, but as most the members of this list are working for companies selling *DSL services, maybe there will be a match :) The network of one of the companies I'm working for is connected to internet simply via a green.ch VDSL line, over a Zyxel P2802. Everything was fine until a few weeks ago, and now I'm getting more and more "Timeout, server not responding." messages in my (even active) terminals connected via ssh to remote hosts, and jabber/imap/etc. connections are getting randomly disconnected too after a few minutes or hours. I guess it's a problem related to the company size: it grew during the last months, and now there are about 20 employee, which makes about 40-50 terminals (PC + VoIP Phones + a few internal servers) connected to the LAN. Is it possible that the Zyxel device is not the proper one anymore for this case? Rebooting doesn't really help, and there are no special messages in the logs, CPU Usage ~ 13%, Memory Usage ~ 60%. Feedback from Studerus Support was to upgrade the Firmware, but it was already up to date... I have the same Router @home and never got this kind of issue. What would you try next? If you think I should get some more hardware (and use the Zyxel as a bridge), what would you then recommend ? Thanks for your attention & a nice end of week to you :-) Olivier

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