SSH on Catalina 10.15 fail

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After upgrading my MAC to OS Catalina 10.15.5 I was unable to connect to PI’s for SSH over the wired ethernet connection returning the error – client_loop: send disconnect: Broken pipe

Wireless connection would work. Using same DHCP server

Air would work and Win10 over wired ethernet would work

Hermes:~ allen$ sw_vers
ProductName: Mac OS X
ProductVersion: 10.15.7
BuildVersion: 19H1615
Hermes:~ allen$ ssh -V
OpenSSH_8.1p1, LibreSSL 2.7.3
Hermes:~ allen$ ifconfig

Terminal application as Termius, SFTP and Web connections would work.

After some research on google I added the following line to my /etc/ssh/ssh_config

Host * IPQoS=throughput

And it fixed the problem. Note that I initially tried to add the same in .ssh/config file (i had to create it) and apparently it is not working on MAC. Unlike any Linux distro.

So use /etc/ssh/ssh_config on MAC to configure your SSH Client;

Hermes:~ allen$ cat /etc/ssh/ssh_config

Host *
SendEnv LANG LC_*
IPQoS=throughput

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