Prev-20 Home Next-20 1 msg BGP issues qwest in Burbank, CA 1 msg Looking for Yahoo-SOC contact 1 msg Cachefly Contact 2 msg auth*.ns.uu.net 1 msg auth00/auth100.ns.uu.net down ? 3 msg PCH BGP Archive down? 1 msg Looking for Flickr contacts 2 msg Charter - Southern Oregon routing issues 1 msg Google Contact 1 msg Bob Crooks/SaskTel/CA is out of the office. Microsoft.com PMTUD black hole? \ Nathan Anderson/FSR (6 May 2008) . \ Brandon Butterworth (6 May 2008) . . \ Iljitsch van Beijnum (6 May 2008) . . . \ Nathan Anderson/FSR (6 May 2008) . . . . \ Nathan Anderson/FSR (6 May 2008) . . . . \ Iljitsch van Beijnum (7 May 2008) . . . . . \ Nathan Anderson/FSR (7 May 2008) . . . \ Bjørn Mork (7 May 2008) . . \ Nathan Anderson/FSR (6 May 2008) . \ Robert Bonomi (6 May 2008) . . \ Tomas L. Byrnes (7 May 2008) . . . \ Marshall Eubanks (7 May 2008) . . . \ Nathan Anderson/FSR (7 May 2008) . . \ Nathan Anderson/FSR (7 May 2008) . . . \ Randy Bush (7 May 2008) . . . \ Glen Turner (7 May 2008) . . . . \ Mark Newton (7 May 2008) . . . . \ Patrick Giagnocavo (7 May 2008) . . . \ Rich Kulawiec (7 May 2008) . . . . \ Nathan Anderson/FSR (7 May 2008) . . . . . \ Michael Sinatra (7 May 2008) . . . . . . \ Iljitsch van Beijnum (7 May 2008) . . . . . . . \ Tomas L. Byrnes (7 May 2008) . . . . . . . . \ Nathan Anderson/FSR (7 May 2008) . . . . . . . . . \ Iljitsch van Beijnum (7 May 2008) . . . . . . . . . . \ Nathan Anderson/FSR (7 May 2008) . . . . . . . . . \ Tomas L. Byrnes (7 May 2008) . . . . . . . . . . \ Iljitsch van Beijnum (7 May 2008) . . . . . . . . . . . \ Tomas L. Byrnes (7 May 2008) . . . . . . . . . . \ Nathan Anderson/FSR (7 May 2008) . . . . . . . \ Tomas L. Byrnes (7 May 2008) . . . . . . . . \ Nathan Anderson/FSR (7 May 2008) . . . . . . . \ Bjørn Mork (8 May 2008) . . . . . . . . \ Joel Jaeggli (8 May 2008) . . . . . . . . . \ Iljitsch van Beijnum (8 May 2008) . . . . . . . . . . \ Smith, Donald (8 May 2008) . . . . . . \ Hank Nussbacher (8 May 2008) . . . . . \ Deepak Jain (7 May 2008) . . . . . . \ SML (7 May 2008) . . . . . . \ Tony Finch (8 May 2008) . . . . . . . \ Blaine Christian (8 May 2008) . . \ Stephen Sprunk (7 May 2008) . \ Iljitsch van Beijnum (7 May 2008) . \ Nathan Anderson/FSR (7 May 2008) . . \ Tomas L. Byrnes (7 May 2008) . . . \ Nathan Anderson/FSR (7 May 2008) . . . \ Matthew Petach (12 May 2008) . \ Michael Sinatra (7 May 2008) . \ Scott Weeks (8 May 2008) . \ Janet Sullivan (8 May 2008) . . \ Niels Bakker (8 May 2008) 4 msg Strange network behaviour 1 msg Was Burma off the air due to the Cyclone ? 17 msg OSPF minutia, and, technote publication venues 2 msg Deadline Extension UBICOMM 2008, September 29 -... 1 msg [Fwd: Re: outages] 2 msg outages 21 msg Did Youtube not pay their domain bill? 9 msg Introducing latency for testing? 33 msg fair warning: less than 1000 days left to IPv4 ... Prev-20 Home Next-20

Prev-Msg Prev-Thread Nanog May-2008 Next-Thread Next-Msg Subject: Re: Microsoft.com PMTUD black hole? Group: Nanog From: Nathan Anderson/FSR Date: 7 May 2008 Here is a brief update on the situation: I have been in contact with someone at Microsoft's service operations center, who has confirmed for me that MS does in fact block _all_ ICMP at the edge of their network, that they are aware that this will in fact break PMTUD, and that they have no current plans to change this practice which they have implemented in the interest of security. Nevertheless, the person I have been in contact with is naturally not the final decision-maker on this issue and is going to continue to pass the issue on up the chain of command for me. So although this issue is not over and I do not have a final verdict from MS yet, I felt that, given that I don't know how much time to expect to pass between now and when that final verdict is rendered, it would be appropriate to let everybody here know what I have learned thus far. Hopefully public dissemination of this information factoid will prevent others in a position similar to mine from having to helplessly beat their heads into their keyboards. I, naturally, voiced my strong objection over this security policy, and attempted to make a reasoned argument with the contact I have over there. We will see what comes of this. Some have asked me to post copies of my private communication with my Microsoft contact here. I don't think it is appropriate for me to post copies of private communication without the other party's consent, so I will have to decline unless he first gives me said consent. Others have asked for valid contact information for the Microsoft NOC, since the ARIN records for their 207.46.0.0/16 do not appear to be up to date. I eventually found a working e-mail address from somebody off-list who pointed to the WHOIS lookup from TUCOWS for microsoft.comosoft.com (which I'm still not clear on what exactly this is...). The e-mail address that was gleaned from this lookup was msnhst, which goes to the Microsoft Corporate Domains Team. They, in turn, forwarded my message on to msnalerts, which generated a ticket # for me and is, as I understand it, the e-mail address I was looking for in the first place (leads to their network/system people). I hope this is helpful to others. Regards, -- Nathan Anderson First Step Internet, LLC nathana _______________________________________________ NANOG mailing list NANOG http://mailman.nanog.org/mailman/listinfo/nanog Prev-Msg Prev-Thread Nanog May-2008 Next-Thread Next-Msg

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