Scp error: subsystem request failed on channel 0 scp: Connection closed

General Discussion
1

I’m trying to copy some files from my Arch desktop to my Clean Linux server as folllows:

scp mm.py x@192.168.1.117:/home/x/

Following authentication, Arch is returning this:

subsystem request failed on channel 0
scp: Connection closed

I’m not having issues copying from Arch desktop to other servers using scp.
The openssh-server bundle is installed on Clear Linux.

systemctl status sshd.socket

returns:

● sshd.socket - OpenSSH Server Socket
     Loaded: loaded (/usr/lib/systemd/system/sshd.socket; disabled; vendor preset: disabled)
     Active: active (listening) since Sat 2022-08-13 17:35:12 UTC; 3s ago
      Until: Sat 2022-08-13 17:35:12 UTC; 3s ago
     Listen: [::]:22 (Stream)
   Accepted: 17; Connected: 1;
      Tasks: 0 (limit: 33498)
     Memory: 8.0K
     CGroup: /system.slice/sshd.socket

Any thoughts?

2

I suspect a firewall rejection on Clear Linux Server. I am learning how Clear Linux sets up things on other work I am doing, but I do not know how to invoke the firewall setup tools. I think iptables is used.

3

A simple way to access the firewall settings is cockpit.