Netstat-an looks at the network port lsof-i:port. Through lsof-i:port, you can see the programs running at the specified port and the current connection.
Nmap port scanning
How does linux ping the gateway port?
A: In linux, ping the gateway port is through the tcping command.
1.tcping does not have its own command. First install the tcping command, or download it in official website.
2. Put the downloaded file in the system32 directory (in fact, it is the same level as cmd.exe) and you can use it directly (in fact, tcping.exe's principle is that you can use the TCP command by opening the cmd command at the same level as it, and just put it on the desktop). This is the way to ping the gateway port in linux.
How to check which ports are located in listening state under Linux?
Use the netstst command to view the ports in listening state:
1, netstat-nupl//n/n indicates that the port number is displayed in digital form, u indicates the UDP protocol type, p indicates the program PID, and l indicates that it is in listening state;
2.netstat-nuplf|grep3306// This means that the process with port number 3306 is located in listening state.
Linux cannot access other server ports?
You can turn off the Linux firewall first.
SystemctlstatusFirewall。 Service View Firewall Status
Systemctlstopfirewalld.service turn off the firewall.
Systemctldisiablefirewall.service prohibits the firewall from starting.
Linux view network port command?
1, ifconfig: The most commonly used command for configuring and viewing network interface information. When executing this command on the server, you will get the following contents, and you can see the status and information of multiple devices.
2.lspci|grep-ieth or lspci|grep-inet command: devices on each pci bus can be listed, and the list of network card devices can be obtained after grep filtering.
3.iwconfig: used to view the wireless network. If you have a wireless network card on your device, you can use this command to view it at this time.
4.ethtool command is mainly used to query configuration network card parameters. Usage: ethtoolethN// where n is the number of the corresponding network card, such as eth0, eth01,etc.