Educause Security Discussion mailing list archives
Re: Blocking port 25 outbound
From: John Kristoff <jtk () NORTHWESTERN EDU>
Date: Mon, 22 Aug 2005 19:44:30 -0500
I'm not intending to pick on the originator of this exact comment, which is why I do not include the usual header in line.
Not a peep from the rest of the campus community.
I've been hearing this sort of "justification" for filters and other kinds of restrictions or limitations of service for some time now. In earlier days when perhaps before most institutions and networks began to implement network responses to some problem the "little" or "no complaints!" from the user community argument may have been a valid measure of success or not. I posit this is really not true any longer, if it ever was for anything more than basic connectivity. My impression is that users, and students in particular, have now been exposed to such filters, restrictions or in general, middle boxes that attempt to "shape" their behavior for so long and so pervasively in many networks they use, their behavior has become just that, shaped. As an illustration, a colleague at another large institution shared their story of turning off their packet shaper to see what would happen. Perhaps things are different now, but after a few months of it being offline, nothing had really changed in their usage. Perhaps due in large part to application behavior, but interesting nonetheless, demand was satisfied elsewhere, in this case over unrestricted R&E links such as Abilene. John
Current thread:
- Re: Blocking port 25 outbound, (continued)
- Re: Blocking port 25 outbound Joe St Sauver (Aug 22)
- Re: Blocking port 25 outbound Information Security (Aug 22)
- Re: Blocking port 25 outbound Information Security (Aug 22)
- Re: Blocking port 25 outbound Trevor J Corbett (Aug 22)
- Re: Blocking port 25 outbound Christopher E. Cramer (Aug 22)
- Re: Blocking port 25 outbound Jason Richardson (Aug 22)
- Re: Blocking port 25 outbound Scott Genung (Aug 22)
- Re: Blocking port 25 outbound Matthew Keller (Aug 22)
- Re: Blocking port 25 outbound Information Security (Aug 22)
- Re: Blocking port 25 outbound Michael Sinatra (Aug 22)
- Re: Blocking port 25 outbound John Kristoff (Aug 22)
- Re: Blocking port 25 outbound Chris Steele (Aug 22)
- Re: Blocking port 25 outbound Orlando Richards (Aug 23)
- Re: Blocking port 25 outbound Paul Russell (Aug 23)
- Re: Blocking port 25 outbound Kenneth G. Arnold (Aug 23)