[outages] TcpDump.org ? Cogent ? Something else ?

Daniel Staal DStaal at usa.net
Sun May 20 10:05:18 EDT 2012


--As of May 20, 2012 9:26:52 AM -0400, Paul Stewart is alleged to have said:

> I can pull up the site no problem today and was able to yesterday as well
> - and my DNS was resolving to 132.213.238.6
>
> The original poster simply asked "anyone seen this before?" - there was no
> indication of WHAT the problem was and how it's operationally impacting
> (therefore appropriate for this list as I would understand it).
>
> Just because you are seeing "host unreachable" doesn't mean that the
> content *behind* it won't be served.  Someone is doing some filtering on
> their router/firewall - pretty common stuff.
>
> Am I missing something here? ;)

--As for the rest, it is mine.

Just that a 50% loss rate and a *4 second* ping time aren't considered 
'normal' for most networks.  ;)  (And are usually a sign of something 
seriously wrong someplace...)  Oh: and 'host unreachable' isn't the same as 
'filtered from the host': It means the previous hop doesn't know how to 
send the packet on.  (Traceroute would normally show a filtered/lost ping 
as a splat.  H! means it got back a reply saying that the host was 
unreachable.)

I'm seeing the same thing here, from a Comcast 'business' connection:

 2  73.235.158.1 (73.235.158.1)  10.086 ms  10.514 ms  9.888 ms
 3  ge-2-14-ur01.martinsburg.wv.bad.comcast.net (68.87.130.25)  9.381 ms 
9.584 ms  9.882 ms
 4  po-100-ur01.catharpin.va.bad.comcast.net (68.87.128.5)  12.888 ms 
12.174 ms  12.488 ms
 5  ae-5-0-ar04.manassascc.va.bad.comcast.net (68.85.67.117)  11.588 ms 
11.782 ms  11.987 ms
 6  so-7-1-0-0-ar04.capitolhghts.md.bad.comcast.net (69.139.175.121) 
13.788 ms  17.581 ms
    69.139.175.129 (69.139.175.129)  14.591 ms
 7  pos-5-3-0-0-cr01.ashburn.va.ibone.comcast.net (68.86.93.137)  17.950 ms
    pos-3-3-0-0-cr01.newyork.ny.ibone.comcast.net (68.86.90.193)  24.597 ms
    pos-3-5-0-0-cr01.newyork.ny.ibone.comcast.net (68.86.91.181)  19.568 ms
 8  pos-1-5-0-0-pe01.111eighthave.ny.ibone.comcast.net (68.86.87.98) 
19.494 ms
    be-11-pe04.ashburn.va.ibone.comcast.net (68.86.84.206)  16.502 ms
    pos-1-5-0-0-pe01.111eighthave.ny.ibone.comcast.net (68.86.87.98) 
20.396 ms
 9  te0-0-0-3.ccr21.jfk07.atlas.cogentco.com (154.54.9.45)  22.085 ms 
21.588 ms  22.290 ms
10  te0-2-0-4.mpd21.dca01.atlas.cogentco.com (154.54.26.113)  16.287 ms
    te0-3-0-1.mpd21.dca01.atlas.cogentco.com (154.54.5.65)  15.985 ms
    te0-2-0-4.mpd22.jfk02.atlas.cogentco.com (154.54.3.1)  21.584 ms
11  te0-5-0-2.mpd21.jfk02.atlas.cogentco.com (154.54.42.34)  18.962 ms
    te0-1-0-7.mpd21.jfk02.atlas.cogentco.com (154.54.1.106)  18.978 ms
    te0-2-0-6.ccr21.ymq02.atlas.cogentco.com (154.54.7.58)  30.696 ms
12  te0-4-0-2.ccr21.ymq02.atlas.cogentco.com (154.54.46.33)  27.691 ms 
27.192 ms
    te0-0-0-6.ccr21.ymq02.atlas.cogentco.com (154.54.5.118)  30.595 ms
13  dmtrl-rq.risq.net (192.77.63.50)  29.786 ms  47.494 ms
    38.104.154.62 (38.104.154.62)  33.880 ms
14  dmtrl-rq.risq.net (192.77.63.50)  30.052 ms * *
15  uq-membre.risq.net (206.167.128.90)  62.456 ms  33.833 ms  33.393 ms
16  uq-membre.risq.net (206.167.128.90)  32.577 ms  34.496 ms  32.684 ms
17  * 132.213.254.254 (132.213.254.254)  3910.492 ms !H *
18  132.213.254.254 (132.213.254.254)  3967.192 ms !H  3999.632 ms !H 
3999.815 ms !H

Daniel T. Staal

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