Re: SSH immediately disconnects after logging in

On Wed, 29 Jul 2026 at 22:38, Sylvain Saboua <[email protected]> wrote:
> I'm trying to log in my SSH administration console on my
> laptop-turned-server.
> I can connect fine from other devices, whether locally or from remote.
> Here on iPhone with iSH, an Alpine Linux emulator, I get this strange
> behavior where it will display the log in prompt (see below) as if the logging in
> were successful but immediately disconnect.

Some VM systems have problems with IP type-of-service, especially if
it changes during a single TCP connection:

> debug2: fd 3 setting TCP_NODELAY
> debug3: set_sock_tos: set socket 3 IP_TOS 0x48

Try adding "IPQoS none none" to the config or command line.

-- 
Darren Tucker (dtucker at dtucker.net)
GPG key 11EAA6FA / A86E 3E07 5B19 5880 E860  37F4 9357 ECEF 11EA A6FA
    Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.