← Back to IBM z/OS RACF Security Technical Implementation Guide

V-223835

CAT II (Medium)

The IBM z/OS PROFILE.TCPIP configuration for the TN3270 Telnet server must have the INACTIVE statement properly specified.

Rule ID

SV-223835r970703_rule

STIG

IBM z/OS RACF Security Technical Implementation Guide

Version

V9R8

CCIs

CCI-001133

Discussion

Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle session will also free up resources committed by the managed network element.

Check Content

Refer to the Profile configuration file specified on the PROFILE DD statement in the TN3270 started task JCL.

Note: If the INCLUDE statement is coded in the TCP/IP Profile configuration file, the data set specified on this statement must be checked for the following items as well.

TELNETGLOBAL Block (only one defined)

TELNETPARMS Block (one defined for each port the server is listening to, typically ports 23 and 992)

If the TELNETPARMS INACTIVE statement is coded either in the TELNETGLOBALS or within each TELNETPARMS statement block and specifies a value between "1" and "900", this is not a finding.

Fix Text

Configure the configuration statements in the PROFILE.Tn3270 to conform to the specifications below:

NOTE: If the INCLUDE statement is coded in the TCP/IP Profile configuration file, the data set specified on this statement must be checked for the following items as well.

The TELNETPARMS INACTIVE statement is coded either within the TELNETGLOBALS OR within each TELNETPARMS statement block and specifies a value between "1" and "900".