[2108] in athena10
Re: [Fwd: [hostmaster] Traffic to physics.unc.edu blocked from
daemon@ATHENA.MIT.EDU (Stephen Joyce)
Tue Apr 7 19:53:12 2009
Date: Tue, 7 Apr 2009 19:52:58 -0400 (EDT)
From: Stephen Joyce <stephen@physics.unc.edu>
To: Nelson Elhage <nelhage@MIT.EDU>
cc: Dee Jarrell <djarrell@email.unc.edu>, linerva@MIT.EDU
In-Reply-To: <20090407213042.GD5764@mit.edu>
Message-ID: <Pine.LNX.4.64.0904071951270.24626@hellbender.physics.unc.edu>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Content-Disposition: inline
Nelson:
I have double-checked for firewall issues here. Finding none, I have opened
a ticket with our campus networking group. They may need additional
information or diagnostics to be performed from your host in order to
diagnose this further.
If they do, I will put them in direct contact with you.
Cheers, Stephen
--
Stephen Joyce
PANIC - Physics and Astronomy Network Infrastructure and Computing
University of North Carolina at Chapel Hill
voice: 919.962.7214
fax: 919.962.0480
On Tue, 7 Apr 2009, Nelson Elhage wrote:
> Thanks for the reply, Stephen.
>
> `traceroute login.physics.unc.edu' fails from Linerva because we can't
> reach ns1.physics.unc.edu. to resolve it, but tracerouting 152.2.5.5
> drops off after el-loco-v1627.net.unc.edu:
>
> 1 NW12-RTR-2-SIPB.MIT.EDU (18.181.0.1) 0.349 ms 0.352 ms 0.398 ms
> 2 EXTERNAL-RTR-2-BACKBONE.MIT.EDU (18.168.0.27) 0.354 ms 0.417 ms 0.480 ms
> 3 NY32-RTR-1-BACKBONE.MIT.EDU (18.168.0.34) 5.912 ms 5.976 ms 6.039 ms
> 4 216.24.184.101 (216.24.184.101) 7.269 ms 7.279 ms 7.265 ms
> 5 wash-newy-98.layer3.nlr.net (216.24.186.23) 11.822 ms 11.821 ms 11.806 ms
> 6 dep7600-gw2-to-nlr-dc.ncren.net (128.109.70.101) 17.257 ms 17.197 ms 17.183 ms
> 7 unc-manning-10G-to-dep7600-gw2.ncren.net (128.109.70.162) 18.321 ms 18.430 ms 18.510 ms
> 8 el-loco-v1627.net.unc.edu (152.19.255.220) 18.042 ms 17.667 ms 17.668 ms
> 9 * * *
>
> (mtr, using ICMP tracing, gets the same result).
>
> I see the same behavior for at least 152.2.5.4, 152.2.5.5, 152.2.5.15
> (ns1.physics.unc.edu), 152.2.5.16 (ns6.physics.unc.edu), and 152.2.4.9
> (www.panic.unc.edu).
>
> I've attached the output of 'ssh -vvv 152.2.5.5', but it's
> uninteresting.
>
> - Nelson
>
> On Tue, Apr 07, 2009 at 12:05:31PM -0400, Stephen Joyce wrote:
>> Hi Dee,
>> Thanks for the heads-up.
>>
>> linerva admin:
>> We use software which automatically blocks abusive hosts for a number of
>> days. The 3rd such block is permanent. However each physics host does
>> this independently and there is no block for anything in the 18.181 range
>> on several hosts I checked.
>>
>> If a single host cannot ping anything in our subnet, I suspect a problem
>> with that host's network configuration.
>>
>> The output of "traceroute login.physics.unc.edu", and "ssh -vvv
>> login.physics.unc.edu" from 18.181.0.51 would be beneficial to see where
>> the problem lies.
>>
>> PS. problem@physics only accepts email from unc.edu addresses by design;
>> all our users have multiple unc.edu addresses.
>>
>> Cheers, Stephen
>> --
>> Stephen Joyce
>> PANIC - Physics and Astronomy Network Infrastructure and Computing
>> University of North Carolina at Chapel Hill
>> voice: 919.962.7214
>> fax: 919.962.0480
>>
>> A cubicle is just a padded cell without a door.
>>
>> On Tue, 7 Apr 2009, Dee Jarrell wrote:
>>
>>>
>>> FYI
>>>
>>>
>>> --
>>>
>>>
>
>
> --
>
>
