# Allow using -M (ControlMaster) to create a master SSH session which
# "tunnels" other connections to the same host, thus reducing the number of
# authentications (which are relatively slow) and TCP connections. The master
-# sockets are stored in ~/.ssh (by default ControlPath is not set).
+# sockets are stored in ~/.ssh (by default ControlPath is not set). Using %r
+# (remote user name) might leak information to other users on the current
+# system (e.g. via netstat or lsof).
ControlPath ~/.ssh/master-%l-%h-%p-%r
# Automatically create a new master session if there's none yet or use an
# existing one. This way the user doesn't have to use -M to enable a master
# minutes.
ClientAliveCountMax 3
-# Enable sftp (and sshfs) usage.
+# Enable sftp (and sshfs) usage. internal-sftp also works in chroots.
Subsystem sftp internal-sftp