查看本地ip信息

ipconfig

查看開放端口

lsof

list open files

檢測對方主機

ping

查看網絡連接情況

netstat

fieldcontentdescribe

proto		The protocol (tcp, udp, udpl, raw) used by the socket
Recv-Q		The count of bytes not copied by the user program connected to this socket
Send-Q		The count of bytes not acknowledged by the remote host
Local Address		Address and port number of the local end of the socket
Foreign Address		Address and port number of the remote end of the socket
State	ESTABLISHED SYN_SENT	The socket has an established connection
State	SYN_SENT	The socket is actively attempting to establish a connection
State	SYN_RECV	A connection request has been received from the network
State	FIN_WAIT1	The socket is closed, and the connection is shutting down
State	FIN_WAIT2	Connection is closed, and the socket is waiting for a shutdown from the remote end
State	TIME_WAIT	The socket is waiting after close to handle packets still in the network
State	CLOSE	The socket is not being used
State	CLOSE_WAIT	The remote end has shut down, waiting for the socket to close
State	LAST_ACK	The remote end has shut down, and the socket is closed. Waiting for acknowledgement
State	LISTEN	The socket is listening for incoming connections.
State	CLOSING	Both sockets are shut down but we still don’t have all our data sent
State	UNKNOWN	The state of the socket is unknown

總結

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