tug.ctan.org inaccessible on a specific machine

[Ettore Aldrovandi]

Actually I have been experiencing troubles with connecting to math.utah.edu <http://math.utah.edu/> as well. Name resolution times out, and ping gets no response. I’m seeing this from my home office, which is connected via CenturyLink.  A trace route dies at
...
5  67.128.147.214 (67.128.147.214)  75.801 ms  76.393 ms  76.897 ms
6  140.197.252.76 (140.197.252.76)  76.886 ms  77.009 ms  76.663 ms
 7  140.197.252.84 (140.197.252.84)  78.542 ms  76.392 ms  76.995 ms
…
which I believe is the beginning of the Utah education network. The 67.128.0.0 is in the CenturyLink space. 

No problem when connecting from work within the fsu.edu <http://fsu.edu/> network.

—Ettore Aldrovandi

Ettore Aldrovandi
Department of Mathematics, Florida State University
1017 Academic Way                *   http://www.math.fsu.edu/~ealdrov
Tallahassee, FL 32306-4510, USA * * aldrovandi at math dot fsu dot edu


> On Apr 2, 2021, at 10:17, Nelson H. F. Beebe <beebe at math.utah.edu> wrote:
> 
> I'm one of the administrators of tug.ctan.org, which is equivalent to
> ftp.math.utah.edu with IPv4 address 155.101.98.136.
> 
> Can you please tell me your host IP address from which you could not
> connect; I can then trace through our logs to see whether you are
> reaching our site, and then being blocked, or if there are no log
> entries, the block could be upstream, such as at the University of
> Utah campus boundary.  If the latter, I should be able to find out
> what is happening, and why.
> 
> Our campus has boundary gateway machines that can impose blocks
> automatically when they `think' traffic is anomalous.  This morning,
> from my home office, where I have a Google Fiber connection, I have no
> trouble doing either a ping to tug.ctan.org, or an FTP connection, or
> a browser HTTP connection.
> 
> Our FTP tree is visible under the Web server /pub tree, so please try
> this alternate path:
> 
> 	http://www.math.utah.edu/pub/ctan/tex-archive/
> 
> and let me know whether that works from your site.
> 
> -------------------------------------------------------------------------------
> - Nelson H. F. Beebe                    Tel: +1 801 581 5254                  -
> - University of Utah                    FAX: +1 801 581 4148                  -
> - Department of Mathematics, 110 LCB    Internet e-mail: beebe at math.utah.edu  -
> - 155 S 1400 E RM 233                       beebe at acm.org  beebe at computer.org -
> - Salt Lake City, UT 84112-0090, USA    URL: http://www.math.utah.edu/~beebe/ -
> -------------------------------------------------------------------------------
> 

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