Hi
friends !! In this post I will explain how to open Windows Firewall in Windows
7 and Windows Vista. What are ports. How to block and unblock particular
program
To open Windows Firewall go to
Choose Start > Control
Panel > Security >Windows Firewall.
Or
Press Windows logo key+R;
type firewall.cpl and press Enter.
or
Choose Start, type windows firewall in the Search box, and then
select Windows Firewall in the results list.
or
In Security Center, click the Windows Firewall link (in the left
pane).
- Click Turn Windows Firewall On or Off .If a security prompt appears, type an administrator password or confirm the action.
- Click On or off; then click OK
Testing
for online vulnerabilities
Traffic flows in and out of your
compute through ports—small, authorized doors in the firewall. (These ports
aren’t the same as the hardware ports that you connect devices to.) A port
number identifies each port uniquely, and certain ports handle only a specific
type of traffic. Port 80 is used for HTTP (web) traffic, for example. Other
ports allow instant messages, printer sharing, and so on. (You can find others
by searching the web for “well-known ports”.)
Windows Firewall
leaves some ports open by default (File and Printer Sharing and your local
network connections, for example) but blocks most of them to incoming traffic,
so when a new program wants to get online, the firewall displays a dialog box
asking you whether it’s OK
_ Unblock if you recognize the program name.
The firewall opens the relevant listening port for this connection and
Future incoming connections. If a security prompt
appears, type an administrator password or confirm the action.
_Keep Blocking if you don’t know which program
the firewall is asking about, or if you know it but don’t want it Phoning home. The program might not work properly
if it
can’t accept incoming traffic (desirable in some cases).
Windows Firewall Tip:
You can check Block All Incoming Connections to block all
unsolicited incoming traffic, even traffic that normally would be permitted by
an exception (described next). Use this extra-secure mode when you connect to a
public wireless hotspot in a café, airport, or hotel, or when a virus is spreading
over your network.
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