These classnotes are depreciated. As of 2005, I no longer teach the classes. Notes will remain online for legacy purposes

UNIX03/Ports And Permissions

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We have been talking about running all services as some sort of non-priviledged user to reduce the damage that a compromised service can cause and increase the difficulty for a cracker to gain root access. However, one of the core security principles behind UNIX is that there are certain protected ports that can only be openned by root.

Every port under 1024 must be created by root. This means the web-server (port 80)http://www.colmgallagher.com/tutorials/urlencoding.html



Classnotes | UNIX03 | RecentChanges | Preferences
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Edited June 14, 2003 1:50 am (diff)
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(C) Copyright 2003 Samuel Hart
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