Jan 12, 2016 · Without the use of any external software. Open a command prompt: netstat -abn; OR . netstat -a -n -p tcp -o; Within Task Manager-> Processes/Details Tab. You can match the PID against the result of the second netstat command above, you can then find the image name/end the process etc if required.

Jul 21, 2015 · Start Command prompt with "Run as administrator", then type netstat -anb. Command runs faster in numerical form ( -n ), and the -b option requires elevation. To filter the output and check only udp ports: use netstat -anb -p udp

Feb 12, 2016 · Bash has been able to access TCP and UDP ports for a while. From the man page: /dev/tcp/host/port If host is a valid hostname or Internet address, and port is an integer port number or service name, bash attempts to open a TCP connection to the corresponding socket. /dev/udp/host/port If host is a valid hostname or Internet address, and port is an integer port …

Aug 25, 2015 · By default, statistics are shown for IP, IPv6, ICMP, ICMPv6, TCP, TCPv6, UDP, and UDPv6; the -p option may be used to specify a subset of the default. -v When used in conjunction with -b, will display sequence of components involved in creating the connection or listening port for all executables. interval Redisplays selected statistics ...

Jun 17, 2011 · also if you want to list running processes that are speaking TCP you can use. sudo netstat -tnp sudo to get processes you don't own -t for TCP -n for numeric -p for pid

Jul 26, 2021 · Port numbers are a thing for tcp and udp, but icmp is a separate protocol at the same level; it's distinguished as protocol 1 in the protocol field of the IP packet (tcp and udp are 6 and 17 respectively).

Sep 23, 2011 · On a normal Unix machine the port is just the second argument on the command line. If you wanted to telnet to your device on port 12345 you'd use: telnet 10.1.1.55 12345 You have to be able to establish a connection to the remote host and know which port number you want to talk to, though.

Nov 5, 2014 · If your serial port is virtual created by some driver through USB connection, use this example to get details about these serial ports. wmic path CIM_LogicalDevice where "Description like 'USB Serial%'" get /value

Mar 7, 2019 · The cmd's mode command shows all the available (to be opened) serial ports, omitting the ones which are occupied by other programs. The PowerShell's command: [System.IO.Ports.SerialPort]::getportna...

Jun 17, 2014 · Just use the telnet command to connect to the port you want to test. If you get the message below, or a message from the service itself, then the port is alive. Minty16 ~ $ telnet localhost 139 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'.