on both computer same version of rsync:
rsync --version
rsync version 3.1.2 protocol version 31
cat /etc/rsnapshot.conf
[...]
backup root@IP:/etc/ localhost/ ssh_args=-i /root/.ssh/id_rsa -p 4378
[...]
protocol version mismatch -- is your shell clean? (see the rsync man page for an explanation) rsync error: protocol incompatibility (code 2) at compat.c(178) [Receiver=3.1.2]
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