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57.
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To add an exception:
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要添加一个例外：
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Translated by
lhquark
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Located in
keeping-safe/C/keeping-safe.xml:124(para)
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58.
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Click <guibutton>Add</guibutton>.
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单击 <guibutton>添加</guibutton>。
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Translated by
lhquark
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Located in
keeping-safe/C/keeping-safe.xml:127(para)
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59.
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You can choose from <guibutton>Preconfigured</guibutton> options for common programs and services, or you can manually add port exceptions in the <guibutton>Simple</guibutton> or <guibutton>Advanced</guibutton> tabs.
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您可以选择 <guibutton>默认</guibutton> 以适合一般的程序和服务，或者您可以在 <guibutton>简单</guibutton> 或是 <guibutton>高级</guibutton> 标签手动添加端口例外。
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Translated by
lhquark
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Located in
keeping-safe/C/keeping-safe.xml:130(para)
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60.
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To find out what type of exception a particular program requires, you should consult the help for that program.
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要了解某个程序需要哪种类型的例外，您需要查询程序的帮助文档。
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Translated by
lhquark
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Located in
keeping-safe/C/keeping-safe.xml:133(para)
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61.
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For a graphical walkthrough of basic Gufw usage, see the <ulink url="https://help.ubuntu.com/community/Gufw">Ubuntu Community Documentation page on <application>Gufw</application></ulink>.
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基本 Gufw 使用的图形化讲解，参见 <ulink url="https://help.ubuntu.com/community/Gufw">Ubuntu社区文档 <application>Gufw</application></ulink>（英文）。
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Translated by
lhquark
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Located in
keeping-safe/C/keeping-safe.xml:136(para)
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62.
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Testing the firewall and monitoring network traffic
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测试防火墙并监视网络流量
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Translated by
lhquark
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Located in
keeping-safe/C/keeping-safe.xml:140(title)
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63.
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To test the firewall it is best to scan it from a second computer. A popular application to use is called <application>nmap</application>.
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检验防火墙的最好方法就是用另一台电脑扫描它。一个叫做<application>nmap</application>的流行的应用程序可以完成这个任务。
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Translated by
lhquark
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Located in
keeping-safe/C/keeping-safe.xml:141(para)
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64.
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nmap
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nmap
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Translated by
lhquark
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Located in
keeping-safe/C/keeping-safe.xml:144(application)
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65.
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Run:
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运行：
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Translated by
lhquark
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Located in
keeping-safe/C/keeping-safe.xml:147(para)
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66.
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nmap -vAPN 192.168.1.100
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nmap -vAPN 192.168.1.100
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Translated by
lhquark
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Located in
keeping-safe/C/keeping-safe.xml:148(command)
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