If, during a penetration test, you obtain access to VAX/VMS or AXP/OpenVMS machines, check whether they are connected to X.25 networks. To perform an X.25 call, use the set host/x2 9 [NUA] command. On those systems prior to OpenVMS 6.0, as well as on all the VMS machines, you may find the NCP utility useful for obtaining additional information related to X.25 networks. Running NCP (MCR NCP) will launch the NETACP .EXE program. At the NCP> prompt, type the commands SHOW KNOWN DTE, SHOW KNOWN circuit, and SHOW KNOWN LINE to obtain detailed information about the X.25 address, circuits, and line for the *VMS machine.

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The Ultimate Computer Repair Guide

The Ultimate Computer Repair Guide

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