How can I set up a time constraint to a particular login, or group of logins, onto the HP 3000?

If you do not have a security product, you could create a UDC using OPTION LOGON, which would check the system time (for example, < 6:00am OR > 7:00pm), then ECHO a warning to the user, and then issue BYE. You might want to include the OPTION NOBREAK as well.

How can I restrict inbound telnet by IP address?

You can limit incoming telnets to your machine by using the INETDSEC.NET.SYS file. If you haven’t made use of this file previously, there’s a sample file — INSECSMP.NET.SYS — that you can copy to INETDSEC.NET.SYS and make changes from there. You will also need to link it with the Posix name using this command:

NEWLINK /usr/adm/inetd.sec, INETDSEC.NET.SYS


Details are in HP's Configuring and Managing MPE/iX Internet Services manual.

How can I dynamically control hardware compression on my DDS drives?

The name of the command file is devctrl.mpexl.telesup. An example:

xeq devctrl.mpexl.telesup 38;compression=disable


The help command “help devctrl.mpexl.telesup” will display the parameters. 

The full syntax must be entered on a single line:

DEVCTRL.MPEXL.TELESUP dev=(ldev) eject=(enable/disable/nochange)
compression=(enable/disable/nochange) load=(online/offline/nochange)