Re: How to get rid of client disconnected network sockets

From	candycanearter07 <candycanearter07@candycanearter07.nomail.afraid>
Newsgroups	comp.os.linux.networking
Subject	Re: How to get rid of client disconnected network sockets
Date	2025-06-18 05:30 +0000
Organization	the-candyden-of-code
Message-ID	<slrn1054jfk.3ce8.candycanearter07@candydeb.host.invalid> (permalink)
References	<102ebko$2pkej$1@gwaiyur.mb-net.net> <102fi9j$2u1dt$5@dont-email.me> <684c1bca@news.ausics.net> <102jgvr$3bor9$1@gwaiyur.mb-net.net>

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Marcel Mueller <news.5.maazl@spamgourmet.org> wrote at 09:56 this Saturday (GMT):
> Am 13.06.25 um 14:38 schrieb Computer Nerd Kev:
>> Lawrence D'Oliveiro <ldo@nz.invalid> wrote:
>>> On Thu, 12 Jun 2025 12:54:16 +0200, Marcel Mueller wrote:
>>>> The clients 192.168.121.24 is disconnected for at least an hour, but the
>>>> sockets at the server seem to stay for an infinite time.
>>>
>>> This to me points to a defect in the protocol, that it does not
>>> periodically exchange "are you there?" packets (even, say, once every 1
>>> minute or 5 minutes), just to be sure the other end is still up.
>> 
>> But maybe the network connection was just interrupted and it'll be
>> back in a few minutes? Since my home internet via mobile broadband
>> is unreliable that often happens during SSH sessions. I can come
>> back in 15min and my SSH terminals are all working again after the
>> signal came back (well, not always, but sometimes).
>
> For this purpose I would recommend "screen". It keeps your ssh session 
> as long as you like.

Or tmux.

>> Mosh, which
>> uses UDP, handles that better though.
>
> UDP sadly fails if a NAT router is in between. Since it cannot know when 
> the connection is closed it just discards the port after a timeout w/o 
> traffic, typically only a few minutes.


Is there any way to change the timeout period?
-- 
user <candycane> is generated from /dev/urandom

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Thread

How to get rid of client disconnected network sockets Marcel Mueller <news.5.maazl@spamgourmet.org> - 2025-06-12 12:54 +0200
  Re: How to get rid of client disconnected network sockets [changing tcp_keep_alive timeouts] Andrzej Adam Filip <anfi@onet.eu> - 2025-06-12 13:24 +0200
    Re: How to get rid of client disconnected network sockets [changing tcp_keep_alive timeouts] Marcel Mueller <news.5.maazl@spamgourmet.org> - 2025-06-14 14:35 +0200
  Re: How to get rid of client disconnected network sockets Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-12 21:53 +0000
    Re: How to get rid of client disconnected network sockets Computer Nerd Kev <not@telling.you.invalid> - 2025-06-13 22:38 +1000
      Re: How to get rid of client disconnected network sockets Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-13 23:40 +0000
      Re: How to get rid of client disconnected network sockets Marcel Mueller <news.5.maazl@spamgourmet.org> - 2025-06-14 11:56 +0200
        Re: How to get rid of client disconnected network sockets Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-06-14 23:37 +0000
        Re: How to get rid of client disconnected network sockets candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2025-06-18 05:30 +0000
          Re: How to get rid of client disconnected network sockets Marcel Mueller <news.5.maazl@spamgourmet.org> - 2025-06-18 10:00 +0200

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