Tip 1: How to check the operation of the port

to exchange information on the network traffic, TCP establishes a connection between the applications running on the computers.In the address field of each data packet includes a numeric identifier that indicates which application is to process the information.These numerical identifiers are called network ports.They are numbered in the range from 1 to 65535.
Guide
1
know what applications and processes occupy ports on your computer, it is possible by means of Windows.Start a command prompt from the "Start" menu and type cmd.In the console, type netstat -a -n -o
command lists all active TCP connections and the UPD, ports and processes.In the column "Local Address" Set IP-address of your computer and through the colon, port number, the process employed in the column PID."External address" reports the address and port of the remote site, which tapped the appropriate application.
How to check the operation of the port
2
To find out the name of the process by its number. Therefore a combination of keys Ctrl + Alt + Delete
opens a window "Process Manager".Click on the "Task Manager" and go to the tab "Processes".Each room in the PID column corresponds to the name of the process or application under "Image Name".If
in the "Task Manager" does not display PID, in the main menu, select the command "View" and "Select Columns."Check the box of the item "ID manually.process (PID) ».
How to check the operation of the port
3
To check the availability of any port, enter the command line cmd.In the console, type telnet.The next line will be prompted to work with this team.Enter the open, where domen_name - your domain name, port_number - port number.
If the port is closed, there will be an announcement cboe: "Could not open a connection to the site, the connection to fail."If the team enters into a dialogue and provides important information - the port is open.
4
ports Protect your computer against unauthorized actions of the program, firewalls, or firewalls.Sometimes it is necessary to open a certain port for communication with another node.If you have a built-in firewall enabled Windows, through the "Control Panel" go to "Network Connections".Right-click on the icon to connect to the Internet to display the shortcut menu.Choose the command "Properties of" go to the tab "Dopolnitelno" and then click "Options."
5
In the "firewall Windows» click "Dobavit port."The pole "Name", enter a description of the application that will occupy the port in the "Nomer porta" - an arbitrary number.If your version offers a choice of TCP and UPD, perform the procedure twice.If you add a port for a specific application, click the "Add Program", and then specify the network path to it by clicking the "Browse" or "Change scope".
How to check the operation of the port

Tip 2: How to check open ports

data exchange between nodes in a network run network protocols (logical interfaces) of different levels.The transport protocol TCP establishes a connection between the client node and the server node and monitors the reliability of delivery of data packets.Data is exchanged between applications that are installed on computers.Network port - is the conventional concept, a number that is assigned the application to the transport protocol know where packets are addressed.This number ranges from 1 to 65535.
How to check open ports
Guide
1
to data exchange is successful, it is necessary that the appropriate ports in the nodes were discovered, ieable to receive and transmit data.The search process is called scanning open ports.They deal with it and hackers, and system administrators: the first - to introduce malware on someone else's computer, the second - to prevent the first to do it.Check 's port you can install on your computer special programs - Scan ports or using online scanners.Go to the site WindowsFAQ.ru: http://www.windowsfaq.ru/content/view/451/82/ .
2
If your computer has a firewall with intrusion detection system and automatic blocking of the attacking unit, turn this option off or add WindowsFAQ.ru the list of exceptions, or the scanner will be locked.In the "Scan Settings," then enter the numbers of the first and end ports from the range that you want to test.This may be the so-calledreserved rooms - from 1 to 1023, and all of the ports on your computer.
3
It is important to set the time during which the scanner will wait for a response from the port .If the "timeout connect" (as the name of this parameter) to do too little, the port may not be able to respond and be wrongly identified as closed.On the other hand, too much waiting time would slow down check.It is best to take the recommended value - 0.3 sec.
4
«Host Address" and "Host Name" - your IP-address that identifies the service automatically.If the address is not defined, the scan does not start.Click "OK" to start scanning.This will open a new window, which shows the progress.
5
After the search results will be displayed: - Date and time of inspection;
- the host address;
- non audited ports;
- the number of open and closed ports;
- skanirovaniya.Krome duration of service will give recommendations on how to determine the process that uses the open ports.
6
You can initiate a scan from your computer.Download the program "port scanner v2.1» http://www.softportal.com/software-4285-skaner-portov.html .
7
In the "Scan ports" in the windows enter the starting and ending port numbers from the range to be checked.If the computer is on a network, enter its IP-address is not necessary.Set in the relevant section scanning speed.It is defined standby time port .It is better to choose a high speed, on the one hand, to avoid errors in determining the status of the port , and on the other - not too tighten the verification process.Select the check box "Display information about the port" to see the search results.Scanner finds open ports and identify processes that use them.
Sources:
  • check open ports on

0
0