Slow transfer speed from MacOS Monterey

Hi,

First of all great application. Thank you...

tl;dr

on Monterey,

remote to local => regular behavior
local to remote => slow speed, like in 2 digit KB/s

How do I debug what is going on in this case?

sshuttle --version => *1.1.10*
OS version => 12.x.x

Tested on all the versions of MacOS between 12.0.1(21A559) to 12.3.1 (21E258)

Without sshuttle, file transfer happens with regular speed just that I cannot directly copy it to destination. I have to copy it in steps.

Long version

On MacOS Monterey, I am noticing very slow file transfer speed if I am sending files from my computer to remote. The remote computer is Ubuntu Linux system. However if I am transferring file from remote system to Mac, it works just fine. Both the computers are on same LAN.

To connect to linux system, I start sshuttle with

sshuttle -r pratik@192.168.1.111 192.168.122.0/24 -NH --no-latency-control --disable-ipv6

This issue of slow speed happens only on OS Monterey. But it works perfectly on Big Sur(I did reinstallation of OS almost 5 times on Mac).

P.S. I can replicate this on other Mac with Monterey or a Virtual Machine running Monterey.

Start by reproducing the reported sshuttle -r command on macOS Monterey and compare local-to-remote transfer speed with Big Sur and remote-to-local transfers. The issue is done when the Monterey transfer-speed regression is identified and resolved, with the reported scenario transferring at normal speed.