nanog mailing list archives
Re: ISP port blocking practice
From: JC Dill <jcdill.lists () gmail com>
Date: Sat, 24 Oct 2009 08:41:33 -0700
Chris Boyd wrote:
Once it's set up correctly we've found customers really like it since their email "just works" in most places.
Earlier this week I had an experience at a San Jose[1] Public Library, where they blocked ports 995, 587, 465, and 119. None of my mail services (or usenet service) worked, except for the news server I use that runs on port 443 (heh) and my webmail backup. Using gmail/webmail I sent an email to the tech admin, and they opened up those ports the next day.
This is the first time I've had problems with using these ports - in other cases it does "just work" as expected. I was rather stunned to run into this at a public library. Usually librarians are major defenders of free speech and fight vigorously against censoring, blocking, and filtering of any type on library computers and networks. My guess is that none of the librarians *knew* that the IT department had setup these blocks. I'll have a chat with them the next time I drop in.
jc[1] San Jose is the 3rd largest city in California, 10th largest city in the US and the center of Silicon Valley - I had expected a higher level of IT clue than I found.
Current thread:
- Re: ISP port blocking practice, (continued)
- Re: ISP port blocking practice Justin Shore (Oct 22)
- Re: ISP port blocking practice Joe Maimon (Oct 22)
- Re: ISP port blocking practice Justin Shore (Oct 22)
- Re: ISP port blocking practice Scott Howard (Oct 22)
- Re: ISP port blocking practice Owen DeLong (Oct 22)
- Re: ISP port blocking practice Chris Boyd (Oct 23)
- Re: ISP port blocking practice Jack Bates (Oct 23)
- Re: ISP port blocking practice Steve Bertrand (Oct 23)
- Re: ISP port blocking practice Michael Peddemors (Oct 23)
- Re: ISP port blocking practice Steve Bertrand (Oct 23)
- Re: ISP port blocking practice JC Dill (Oct 24)
- Re: ISP port blocking practice Justin Shore (Oct 23)
- Re: ISP port blocking practice Lee Riemer (Oct 23)
- Re: ISP port blocking practice James R. Cutler (Oct 23)
- Re: ISP port blocking practice Dan White (Oct 23)
- Re: ISP port blocking practice Justin Shore (Oct 23)
- Re: ISP port blocking practice Dan White (Oct 23)
- Re: ISP port blocking practice Owen DeLong (Oct 23)
- Re: ISP port blocking practice Patrick W. Gilmore (Oct 24)
- Re: ISP port blocking practice Clue Store (Oct 24)