On 20 May 2026 at 6:23, Marco Moock wrote:
Date sent: Wed, 20 May 2026 06:23:42 +0200
Subject: Re: Kernel 7.0, IPv6 (maybe privacy), and SSH
issue
To: [email protected]
From: Marco Moock <[email protected]>
Send reply to: Community support for Fedora users
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> Am 19.05.26 um 23:03 schrieb Chris Adams:
> > Starting with kernel 7.0, when I start my desktop and SSH to my server,
> > my SSH session will drop after a short time, maybe 5-20 minutes. If I
> > reconnect, it'll drop again, sometimes do this 2-3 times... and then be
> > fine the rest of the day.
> >
> > I'm guessing that maybe it's related to privacy address rotation, but
> > that's just a guess.
>
> There is a lifetime shown in ip a. Please check how long that is.
>
> Be aware that SPI firewalls (firewalld, on your router etc.) can also be
> the issue. How are the following parameters set?
>
> net.ipv4.tcp_keepalive_intvl = 5
> net.ipv4.tcp_keepalive_probes = 4
> net.ipv4.tcp_keepalive_time = 10
>
> This also affects IPv6, despite the name.
>
> --
> Gruß
> Marco
Looked at ip a with a 10 second pause.
shows lo, ethernet, and wifi
# clear; ip a | grep lft; sleep 10; ip a | grep lft
valid_lft forever preferred_lft forever
valid_lft forever preferred_lft forever
valid_lft 78239sec preferred_lft 78239sec
valid_lft forever preferred_lft forever
valid_lft forever preferred_lft forever
valid_lft 78229sec preferred_lft 78229sec
So the wifi time dropped by 10 seconds after 10 seconds.
Not sure what value it starts at. remove other lines.
>
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