1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" type="topic" style="task" id="net-firewall-on-off" xml:lang="hi">
<info>
<link type="guide" xref="net-security"/>
<desc>You can control which programs can access the network. This helps to keep your computer secure.</desc>
<revision pkgversion="3.4.0" date="2012-02-20" status="final"/>
<credit type="author">
<name>Paul W. Frields</name>
<email>stickster@gmail.com</email>
</credit>
<include xmlns="http://www.w3.org/2001/XInclude" href="legal.xml"/>
</info>
<title>Enable or block firewall access</title>
<comment>
<cite date="2012-02-19">shaunm</cite>
<p>Continue to revisit this page until we can provide real instructions.
As it is, we're stuck in "whatever distros do" territory.</p>
</comment>
<p>Your system should be equipped with a <em>firewall</em> that allows it to block programs from being accessed by other people on the internet or your network. This helps to keep your computer secure.</p>
<p>Many applications can use your network connection. For instance, you can share files or let someone view your desktop remotely when connected to a network. Depending on how your computer is set up, you may need to adjust the firewall to allow these services to work as intended.</p>
<p>Each program that provides network services uses a specific <em>network port</em>. To enable other computers on the network to access a service, you may need to "open" its assigned port on the firewall:</p>
<steps>
<item>
<p>Go to <gui>Activities</gui> in the top left corner of the screen and start your firewall application. You may need to install a firewall manager yourself if you can't find one (for example, Firestarter or GUFW).</p>
</item>
<item>
<p>Open or disable the port for your network service, depending on whether you want people to be able to access it or not. Which port you need to change will <link xref="net-firewall-ports">depend on the service</link>.</p>
</item>
<item>
<p>Save or apply the changes, following any additional instructions given by the firewall tool.</p>
</item>
</steps>
</page>
|