Advice 1: How to find a free port

When data is exchanged between network nodes the TCP Protocol addresses the packages of certain applications that process the information. In each packet specify the source port and destination port. A port is a conventional number from 1 to 65535 that identifies which application receives the packet.
How to find a free port
Instruction
1
Ports, ready to receive packets, called open. Find them on the computer using special software scanners. Many online services offer this service. Go to the website PortScan.Ru (http://portscan.ru/fullscan.php). In the tab "Online scanner", click the "Services & protocols" to find the open ports and learn to work with what applications they are configured.
2
Spyware programs usually use some specific ports for the unauthorized access to information. Click on the "Trojans and viruses" to find out whether or not these ports on your computer. There you can see a list of malware that connect to each port.
3
To check another popular online scanner click on the link http://www.windowsfaq.ru/content/view/451/82/ Read the condition of use of the service, tick the checkbox "I have read and agree..." and click "Accept terms of use...". If you have a firewall that is configured to identify and block attacks, disable this feature or make the scanner exclusion list.
4
For example, if you have Windows Firewall enabled, go to the tab "Exceptions" and click the "Change scope". Turn the switch to "custom list" and enter the IP of the service 77.221.143.203. Press OK to confirm.
5
In the window "scan Settings", enter the range of ports you want to scan. This value is best left at default. Click "Start scan" to start scanning. In the list of checked ports in red will be marked open.
6
To check the status of the ports PC means Windows. The key combination Win+R to call the string "Open" and enter the command cmd. In the command window, type netstat –a –n –o. The program displays a list of all active connections. In the column "Local address" after the colon with the IP of your computer indicate the number of the port. It corresponds to the process number from the PID column.
7
To know number of process its name, call the "process Manager" Ctrl+Alt+Delete and go to the tab "Processes". Find the correspondence between the process ID and its name in the column "image Name".

Advice 2: How to check open ports on your computer

Check ports on the computer in several ways. Open and not used by system processes or LAN port may be the cause of penetration into the system dangerous software, access your computer from outside.
network
Instruction
1
First of all, such a situation is to prevent system protection: antivirus and firewall. If you have not installed, you must install and test the system. Moreover, it is desirable to establish an efficient and optimal means of protection (e.g. Kaspersky Internet Security). But if you have not used such software, possibly malicious, open port has been used dangerous applications.
2
The easiest way to view the presence of such port with a simple text, which can be performed online at the link: http://2ip.ru/port-scaner/. If the analysis of your computer, you'll find the open port (potentially dangerous for system), it will show red color. If a port in the course of the inspection found, make a note of the name separately because it urgently needs to be closed.
3
To close such port, you can use many programs. But the most simple is Windows Worms Doors Cleaner, with a volume of only 50 KB does not require installation (you can download it at: http://2ip.ru/download/wwdc.exe). After downloading it just run the malware and close the port that issued the computer analysis after the test. Then restart the computer. However, it is rather the action, so to speak, in haste, as the port may again be opened. Therefore, it is advisable to install a firewall (e.g. Outpost Firewall) and to maintain the status quo after the closure threat of the port.
4
Also does not interfere with the test computer using a free utility AVZ (can be downloaded from the link: http://www.z-oleg.com/secur/avz). During a quick test, it is necessary to detect errors of the system settings, probably shot down using the same port. For example, if you allow "anonymous user" you should disable it and restart the computer.

Advice 3: How to find the firewall

Since the XP line operating systems of the Windows family appeared tool that plays a key role in ensuring the security of your computer - firewall or firewall. Management of the firewallω is carried out using special equipment, access to which can be obtained in several ways. However, novice users of personal computers often raises the question of how to find firewall in Windows.
How to find the firewall
You will need
  • - administrator rights in Windows.
Instruction
1
Find the firewallusing the icon in a folder window "control Panel". Open the control panel window. To do this, click on the "start" button located in the taskbar on the desktop. To open a menu. Highlight "settings", wait until a child menu, click on "control Panel".In the opened control panel window, locate the shortcut to Windows Firewall. If control panel is set to display items by categories, pre-click "Network and Internet connections". Search for the label, focusing on the names of the elements. For faster searching you can switch to display mode "table" by clicking on the corresponding menu item "View". You should then sort the list by "Name" column by clicking on it with the mouse.Open the administration window firewallohms. Double click with the left mouse button on the icon "Windows Firewall", or right click and select "Open" from the context menu.
2
Find the firewallusing the network connections folder. Open the folder network connections. This can be done either by clicking on the "start" button, then selecting "settings" and "Network connections", or by selecting the menu item "Open folder "Network connections" item in the context menu that appears when right clicking the mouse on the connection icon in the system tray.Find window block "Network tasks". Expand it if it is collapsed, clicking on the arrow icon in the upper right corner of the block. Open the firewallby clicking on the link "Change settings for the firewalland Windows.
3
Go to the management of the firewall, part of Windows control properties of the particular network connection. Open the folder network connections using one of the methods described in the second step. Click the right mouse button on one of the shortcut network connections. In the context menu select "Properties". In the displayed dialog go to the Advanced tab. In the control group "Windows Firewall" click on "Settings".
Note
Do not change firewall settings without a special need. Rash change settings (for example, open ports) may threaten the safety of your computer.
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