[114637] in North American Network Operators' Group
RE: MX problems
daemon@ATHENA.MIT.EDU (Dave Larter)
Tue May 19 19:27:12 2009
Date: Tue, 19 May 2009 19:24:51 -0400
In-Reply-To: <E17E0A5A-3FF3-4CE2-AD4A-06BA21298DA5@siliconlandmark.com>
From: "Dave Larter" <dave@stayonline.com>
To: "Andre Guibert de Bruet" <andy@siliconlandmark.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Thanks, actually I wasn't addressing the rr connects, no telling what
they are doing/not doing just from the .edu.
-----Original Message-----
From: Andre Guibert de Bruet [mailto:andy@siliconlandmark.com]=20
Sent: Tuesday, May 19, 2009 7:14 PM
To: Dave Larter
Cc: Polar Humenn; nanog@nanog.org
Subject: Re: MX problems
Hi,
This doesn't appear to be DNS related. You can see from the trace that =20
the forward resolution is in fact occurring just fine.
It would appear that Comcast/RoadRunner filters SMTP in your market (A =20
quick Google search indicates that this has been happening in various =20
places since at least 2004). Do you still have issues if you try using =20
their SMTP servers?
Cheers,
/* Andre Guibert de Bruet * 436f 6465 2070 6f65 742e 2042 6974 206a */
/* Managing Partner * 6f63 6b65 792e 2053 7973 4164 6d69 6e2e */
/* GSM: +1 734 846 8758 * 2055 4e49 5820 736c 6575 7468 2e00 0000 */
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On May 19, 2009, at 7:07 PM, Dave Larter wrote:
> Did you flush your dns cache? Its happened to me before, couldn't
> resolve our own domains, turned out to be a bad switch, for almost
> everything it worked fine but had intermittent problems with 53. I =20
> have
> seen it before with other prots too.
>
>
>
> From: Polar Humenn [mailto:polar.humenn@gmail.com]
> Sent: Tuesday, May 19, 2009 7:02 PM
> To: Dave Larter
> Cc: nanog@nanog.org
> Subject: Re: MX problems
>
>
>
>> From my mail log. Geez, I can't even get to Cornell, which is just =20
>> down
> the friggin road! (Yeah, I know, but really).
> What is going on?
>
> May 19 18:58:26 greene postfix/smtp[5895]: connect to
> mailin-01.mx.AOL.COM[205.188.159.57]: No route to host (port 25)
> May 19 18:58:27 greene postfix/smtp[5904]: connect to
> penguin.cs.cornell.edu[128.84.96.11]: No route to host (port 25)
> May 19 18:58:27 greene postfix/smtp[5899]: connect to
> mx.vgs.untd.com[64.136.52.37]: No route to host (port 25)
> May 19 18:58:27 greene postfix/smtp[5919]: connect to
> incoming3.american.edu[147.9.1.250]: No route to host (port 25)
> May 19 18:58:30 greene postfix/smtp[5904]: connect to
> iago.cs.cornell.edu[128.84.96.10]: No route to host (port 25)
> May 19 18:58:30 greene postfix/smtp[5904]: 0992D8DDE:
> to=3D<simeon@cs.cornell.edu>, relay=3Dnone, delay=3D371744, =
status=3Ddeferred
> (connect to iago.cs.cornell.edu[128.84.96.10]: No route to host)
> May 19 18:58:30 greene postfix/smtp[5919]: connect to
> incoming2.american.edu[147.9.1.249]: No route to host (port 25)
> May 19 18:58:30 greene postfix/smtp[5919]: 5F6AC8C0E:
> to=3D<drshow@wamu.org>, relay=3Dnone, delay=3D116954, =
status=3Ddeferred =20
> (connect
> to incoming2.american.edu[147.9.1.249]: No route to host)
> May 19 18:58:33 greene postfix/smtp[5901]: connect to
> cisbec.net.s6a1.psmtp.com[64.18.5.10]: No route to host (port 25)
> May 19 18:58:33 greene postfix/smtp[5913]: connect to
> smtp-mx6.mac.com[17.148.20.69]: No route to host (port 25)
> May 19 18:58:35 greene postfix/smtp[5895]: connect to
> mailin-01.mx.AOL.COM[205.188.156.248]: No route to host (port 25)
> May 19 18:58:36 greene postfix/smtp[5899]: connect to
> mx.dca.untd.com[64.136.44.37]: No route to host (port 25)
> May 19 18:58:36 greene postfix/smtp[5899]: D3A158876:
> to=3D<becward@JUNO.COM>, relay=3Dnone, delay=3D183359, =
status=3Ddeferred
> (connect to mx.dca.untd.com[64.136.44.37]: No route to host)
> May 19 18:58:42 greene postfix/smtp[5901]: connect to
> cisbec.net.s6a2.psmtp.com[64.18.5.11]: No route to host (port 25)
> May 19 18:58:45 greene postfix/smtp[5901]: connect to
> cisbec.net.s6b1.psmtp.com[64.18.5.13]: No route to host (port 25)
> May 19 18:58:45 greene postfix/smtp[5910]: connect to
> hrndva-smtpin01.mail.rr.com[71.74.56.243]: No route to host (port 25)
> May 19 18:58:48 greene postfix/smtp[5901]: connect to
> cisbec.net.s6b2.psmtp.com[64.18.5.14]: No route to host (port 25)
> May 19 18:58:48 greene postfix/smtp[5901]: 0992D8DDE:
> to=3D<arahant1@cisbec.net>, relay=3Dnone, delay=3D371762, =
status=3Ddeferred
> (connect to cisbec.net.s6b2.psmtp.com[64.18.5.14]: No route to host)
>
>
>
> On Tue, May 19, 2009 at 6:57 PM, Dave Larter <dave@stayonline.com>
> wrote:
>
> Hi, I have no problem getting there, is that their mx's?
>
> Tracing route to s0.nanog.org [198.108.95.20]
> over a maximum of 30 hops:
>
> 1 117 ms 128 ms 115 ms argon.socrdu.net [64.132.109.136]
> 2 * 122 ms 126 ms 64.132.109.130
> 3 125 ms 106 ms 124 ms 64.132.109.129
> 4 130 ms 125 ms 113 ms 64-132-140-113.static.twtelecom.net
> [64.132.140.113]
> 5 129 ms 139 ms 139 ms scor-01-rif1.mtld.twtelecom.net
> [66.192.243.134]
> 6 129 ms 137 ms 148 ms te4-2.mpd02.dca01.atlas.cogentco.com
> [154.54.26.121]
> 7 152 ms 154 ms 240 ms te7-8.ccr01.jfk02.atlas.cogentco.com
> [154.54.5.49]
> 8 158 ms 153 ms 151 ms te9-8.mpd01.bos01.atlas.cogentco.com
> [154.54.25.242]
> 9 170 ms 172 ms 167 ms te7-8.ccr01.ord01.atlas.cogentco.com
> [154.54.7.81]
> 10 188 ms 172 ms 163 ms te8-2.mpd01.ord03.atlas.cogentco.com
> [154.54.25.66]
> 11 194 ms 170 ms 174 ms merit.demarc.cogentco.com =20
> [66.28.21.234]
> 12 164 ms 163 ms 166 ms tenge0-0-0-0x76.aa2.mich.net
> [198.108.23.10]
> 13 171 ms 164 ms 171 ms 198.108.22.186
> 14 171 ms 173 ms 171 ms s0.nanog.org [198.108.95.20]
>
> Trace complete.
>
> And yes, I only get that one mx/ip for nanog.org.
>
>
> -----Original Message-----
> From: Polar Humenn [mailto:polar.humenn@gmail.com]
> Sent: Tuesday, May 19, 2009 6:44 PM
> To: nanog@nanog.org
> Subject: MX problems
>
> I'm in Syracuse NY, and I'm having problems getting sendmail to get to
> MX
> servers, with the errors of "No Route to Host" or "Connection timed
> Out".
> Apparently this is been happening for over 5 days. I can send mail
> within
> Syracuse University, but as soon as I venture out nothing. Traceroute
> seems
> to loose it after about the 9 or 10th hop.
>
> It seems that I can get to almost any website, but tracerouting or
> pinging
> these MX servers is not happening.
>
> Is there anything going on, or at least something that started 5-7 =20
> days
> ago?
>
> I find the same problem from within Syracuse Univeristy to my =20
> RoadRunner
> account at home (which does not pass through the university =20
> routers). I
> only
> noticed it from the university since thats where I usually send my =20
> email
> through. Like I would no have been able to post to this list
>
>> From my home machine:
>> traceroute s0.nanog.org
> traceroute to s0.nanog.org (198.108.95.20), 30 hops max, 60 byte =20
> packets
> 1 192.168.99.1 (192.168.99.1) 0.211 ms 0.257 ms 0.302 ms
> 2 10.217.224.1 (10.217.224.1) 13.754 ms 13.855 ms 14.291 ms
> 3 gig2-2.syrcnysyr-rtr01.nyroc.rr.com (24.92.231.138) 18.442 ms
> 22.701
> ms 26.908 ms
> 4 gig1-1-0.syrcnyflk-rtr02.nyroc.rr.com (24.92.231.54) 31.279 ms
> 31.454
> ms 31.591 ms
> 5 ge-4-3-0.albynywav-rtr03.nyroc.rr.com (24.24.7.53) 37.429 ms
> 37.604
> ms 37.779 ms
> 6 ae-5-0.cr0.nyc30.tbone.rr.com (66.109.6.74) 41.329 ms 18.241 ms
> 22.192 ms
> 7 ae-1-0.pr0.nyc20.tbone.rr.com (66.109.6.163) 27.472 ms 19.542 ms
> 23.419 ms
> 8 te1-4.mpd01.jfk05.atlas.cogentco.com (154.54.13.185) 28.070 ms
> 32.824
> ms 35.822 ms
> 9 te9-3.ccr01.jfk02.atlas.cogentco.com (154.54.3.165) 40.796 ms
> 40.549
> ms te2-4.ccr01.jfk02.atlas.cogentco.com (154.54.6.49) 40.958 ms
> 10 te2-4.mpd01.bos01.atlas.cogentco.com (154.54.5.249) 48.704 ms
> 47.549
> ms 48.468 ms
> 11 te2-2.ccr01.ord01.atlas.cogentco.com (154.54.6.154) 57.836 ms
> te8-8.mpd01.ord01.atlas.cogentco.com (154.54.24.54) 58.063 ms
> te2-2.mpd01.ord01.atlas.cogentco.com (154.54.6.18) 46.700 ms
> 12 vl3488.mpd01.ord03.atlas.cogentco.com (154.54.5.26) 56.905 ms
> te3-4.mpd01.ord03.atlas.cogentco.com (154.54.6.206) 56.144 ms
> vl3488.mpd01.ord03.atlas.cogentco.com (154.54.5.26) 45.245 ms
> 13 Merit.demarc.cogentco.com (38.112.7.10) 44.512 ms
> Merit.demarc.cogentco.com (66.28.21.234) 38.385 ms
> Merit.demarc.cogentco.com (38.112.7.10) 40.305 ms
> 14 tenge0-0-0-0x76.aa2.mich.net (198.108.23.10) 43.637 ms 42.601 ms
> 43.902 ms
> 15 198.108.22.186 (198.108.22.186) 48.455 ms 51.436 ms 44.070 ms
> 16 * * *
> 17 * * *
> 18 * * *
> 19 * * *
> 20 * * *
> 21 * * *
> 22 * * *
> 23 * * *
> 24 * * *
> 25 * * *
> 26 * * *
> 27 * * *
> 28 * * *
> 29 * * *
> 30 * * *
>
>
> Any ideas?
> Cheers,
> -Dr Polar
>
>
