/proc/sys/net/mptcp/
/proc/sys/net/mptcp
NameSizeModeActions
add_addr_timeout00644editdlrm
allow_join_initial_addr_port00644editdlrm
checksum_enabled00644editdlrm
enabled00644editdlrm
stale_loss_cnt00644editdlrm
Edit: /proc/sys/net/mptcp/allow_join_initial_addr_port (0B)
cmd: