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Groups > linux.debian.user > #187482

Re: Free TCP/IP port numbers?

From Michael Stone <mstone@debian.org>
Newsgroups linux.debian.user
Subject Re: Free TCP/IP port numbers?
Date 2017-10-02 12:50 +0200
Message-ID <uw6sp-6dS-5@gated-at.bofh.it> (permalink)
References <uvB5f-3Fc-1@gated-at.bofh.it> <uvBeV-3IX-5@gated-at.bofh.it> <uvBHX-3TN-1@gated-at.bofh.it> <uvCkF-4uk-1@gated-at.bofh.it> <uw694-66R-17@gated-at.bofh.it>
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On Mon, Oct 02, 2017 at 10:19:42AM -0000, Dan Purgert wrote:
>Trouble with ports <1024 is that the process trying to use them will
>need root permissions to bind to the port.  This may cause its own
>fallout rather than using something in the upper range.

And the advantage of such a port is that a user can't grab a port that 
you want to use the system. (An event which can cause its own fallout, 
as well as potentially being a security problem.) Luckily systemd makes 
it much easier to reserve a port early in the boot process so that's not 
as much of a problem as it used to be.

Mike Stone

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Thread

Free TCP/IP port numbers? Victor Porton <porton@narod.ru> - 2017-10-01 03:20 +0200
  Re: Free TCP/IP port numbers? "Alexander V. Makartsev" <avbetev@gmail.com> - 2017-10-01 03:30 +0200
    Re: Free TCP/IP port numbers? Victor Porton <porton@narod.ru> - 2017-10-01 04:00 +0200
      Re: Free TCP/IP port numbers? "Alexander V. Makartsev" <avbetev@gmail.com> - 2017-10-01 04:30 +0200
        Re: Free TCP/IP port numbers? Gene Heskett <gheskett@shentel.net> - 2017-10-01 07:30 +0200
          Re: Free TCP/IP port numbers? <tomas@tuxteam.de> - 2017-10-01 09:40 +0200
            Re: Free TCP/IP port numbers? tomas@tuxteam.de - 2017-10-01 09:50 +0200
            Re: Free TCP/IP port numbers? Gene Heskett <gheskett@shentel.net> - 2017-10-01 13:50 +0200
              Re: Free TCP/IP port numbers? Reco <recoverym4n@gmail.com> - 2017-10-01 14:20 +0200
                Re: Free TCP/IP port numbers? <tomas@tuxteam.de> - 2017-10-01 15:00 +0200
                Re: Free TCP/IP port numbers? Gene Heskett <gheskett@shentel.net> - 2017-10-01 15:50 +0200
                Re: Free TCP/IP port numbers? <tomas@tuxteam.de> - 2017-10-01 16:20 +0200
                Re: Free TCP/IP port numbers? Reco <recoverym4n@gmail.com> - 2017-10-01 16:50 +0200
                Re: Free TCP/IP port numbers? rhkramer@gmail.com - 2017-10-02 23:10 +0200
                Re: Free TCP/IP port numbers? Greg Wooledge <wooledg@eeg.ccf.org> - 2017-10-02 23:10 +0200
                Re: Free TCP/IP port numbers? Reco <recoverym4n@gmail.com> - 2017-10-02 23:30 +0200
                Re: Free TCP/IP port numbers? Gene Heskett <gheskett@shentel.net> - 2017-10-01 16:50 +0200
                Re: Free TCP/IP port numbers? <tomas@tuxteam.de> - 2017-10-01 17:00 +0200
                Re: Free TCP/IP port numbers? Gene Heskett <gheskett@shentel.net> - 2017-10-01 17:40 +0200
                Grep's "ignore binry files" option [was: Free TCP/IP port numbers?] <tomas@tuxteam.de> - 2017-10-01 18:00 +0200
                Re: Grep's "ignore binry files" option [was: Free TCP/IP port numbers?] Gene Heskett <gheskett@shentel.net> - 2017-10-01 18:40 +0200
              Re: Free TCP/IP port numbers? <tomas@tuxteam.de> - 2017-10-01 14:50 +0200
              Re: Free TCP/IP port numbers? Dan Purgert <dan@djph.net> - 2017-10-02 12:30 +0200
      Re: Free TCP/IP port numbers? shawn wilson <ag4ve.us@gmail.com> - 2017-10-01 04:40 +0200
        Re: Free TCP/IP port numbers? Dan Purgert <dan@djph.net> - 2017-10-02 12:30 +0200
          Re: Free TCP/IP port numbers? Michael Stone <mstone@debian.org> - 2017-10-02 12:50 +0200
  Re: Free TCP/IP port numbers? deloptes <deloptes@gmail.com> - 2017-10-01 10:00 +0200
  Re: Free TCP/IP port numbers? <tomas@tuxteam.de> - 2017-10-01 15:00 +0200
  Re: Free TCP/IP port numbers? Victor Porton <porton@narod.ru> - 2017-10-01 15:00 +0200
    Re: Free TCP/IP port numbers? Michael Stone <mstone@debian.org> - 2017-10-01 15:20 +0200
    Re: Free TCP/IP port numbers? Nicholas Geovanis <nickgeovanis@gmail.com> - 2017-10-04 16:50 +0200
  Re: Free TCP/IP port numbers? Gene Heskett <gheskett@shentel.net> - 2017-10-02 23:00 +0200
    Re: Free TCP/IP port numbers? Reco <recoverym4n@gmail.com> - 2017-10-02 23:30 +0200

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