mosh: does not connnect / mosh-server does not initiate with OpenSSH-Win32 as the default ssh

[tigerinus]

Moved mobile-shell/mosh#1259 to here since mosh isn't officially supported for MSYS2.

Description / Steps to reproduce the issue

1. Follow https://learn.microsoft.com/en-us/windows-server/administration/openssh/openssh_install_firstuse to add and run OpenSSH to Windows, or install OpenSSH-Win32 via winget:

   ~ ❯ winget install Microsoft.OpenSSH.Beta

   Make sure sshd is working:

   

2. Install mosh

   ~ ❯ pacman -S mosh

3. Run

   

Expected behavior

It should just work

Actual behavior

~ ❯ mosh localhost
CreateProcessW failed error:2
posix_spawnp: No such file or directory
/usr/bin/mosh: Did not find remote IP address (is SSH ProxyCommand disabled?).

~ ❯ mosh-server.exe new
Error binding to any interface: setsockopt: Invalid argument
Network exception: setsockopt: Invalid argument

Verification

• I have verified that my MSYS2 is up-to-date before submitting the report (see https://www.msys2.org/docs/updating/)

Windows Version

MSYS_NT-10.0-19045 powerberry 3.4.6.x86_64 2023-02-15 18:03 UTC x86_64 Msys

Are you willing to submit a PR?

If someone tells me how to fix this.

[Biswa96]

I can reproduce the mosh-server issue. I can not figure out the relation between mosh and ssh and not sure about the mosh localhost issue. But the following commands work

• mosh-server.exe new -i 127.0.0.1
• MOSH_KEY=foobar mosh-client.exe 127.0.0.1 60001

[tigerinus]

Does it run mosh localhost successfully?

[Biswa96]

Does it run mosh localhost successfully?

No. I get the following message

$ mosh localhost
/usr/bin/mosh: Could not connect to localhost, last tried ::1: Connection refused
kex_exchange_identification: Connection closed by remote host
Connection closed by UNKNOWN port 65535
/usr/bin/mosh: Did not find remote IP address (is SSH ProxyCommand disabled?).

The /usr/bin/mosh is a perl script. I am not familiar with the perl language.