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Chapter 5 Unix and Linux Security > Controlling Root Access

Controlling Root Access

There are a number of ways to limit access for the root user.

Configuring Secure Terminals

Most Unix systems allow us to restrict root logins to special terminals, typically the system console. This approach is quite effective, especially if the console or the allowed terminals are under strict physical access control. The obvious downside of this approach is that remote access to the system can be very limited: using this approach, access through any TCP/IP-based connection cannot be configured, thus requiring a direct connection, such as a directly attached terminal or a modem.

Configuration is quite different for the various Unix systems. Figure 5.8 shows the comparison between Solaris and Debian.

Gaining Root Privileges With su

  

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