We still have the same problem, now with MacOs BigSur: After syncing a few files acrosync always stops with "unable to send data over the ssh channel". Native Macos rsync is running without problems. Hmm, this problem should be solvable.
We have no proxy server running, but there is a firewall (pfsense) between Acrosync and the server.Similar to aaronvegh, native Macos rsync is running without problems.
/var/log/auth.log:
pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=.... user=...
But the authentication is ok, a few will be synced before 'unable to send data over the ssh channel'
There are no problems with normal rsync, but Acrosync seems to be "to slow" (LIBSSH2_ERROR_SOCKET_SEND)
Perhaps this could be the solution (?):
https://www.cyberciti.biz/tips/open-ssh-server-connection-drops-out-after-few-or-n-minutes-of-inactivi…
I found out that the "name contains illegal characters" failure only arises when syncing from Ubuntu to Macos.
There were no failures when syncing exactly the same files the other direction (from Macos to Ubuntu). Very strange behavior.
You are right, I forgot the character "?" and perhaps some others too. But the orginal Rsync has no problem to copy this files between Ubuntu and Macos. This restriction of Acrosync is definitly not a good idea because it's unusable for the some pur…