R.S. writes: > W dniu 2016-05-25 o 18:19, Blake, Daniel J [CTR] pisze: > >Just wondering if anyone has successfully logged into TSO using the HMC > >while being at a remote location? > > > >Let's say the Mainframe is in New York City and the HMC is sitting right > >next to it. I'm sitting on the beach in Miami, using the HMC's IP address > >I connect to it. From there is there a way to log into TSO? > Yes, and no. > Rather NO. > > Details: > Important: HMC cannot connect to TSO *in any special way*. From TSO (VTAM, > TCPIP) point of view it is just another PC in the network. So, if you launch > some 3270 emulator and you have proper LAN connectivity then you can connect > from HMC to a z/OS image, including TSO. > In the old (pre-z9) days of good old OS/2 based HMC you had full-feature > PCOMM 4.3 on your HMC. It can be used remotely, that means you had to > connect to HMC using "remote desktop" and voila - started any application > you wanted, including PCOMM. > > However nowadays HMC is Linux-based and has poor x3270 which is still able > to connect to z/OS image *but IT IS NOT ALLOWED TO USE REMOTELY". Why? I > don't see any reason. IMHO it is one of the most unreasonable "features" of > HMC. > > So, assuming you have z9, z10, z196, EC12, or z13, NO YOU CANNOT DO IT. > > > Fine print: there are also 3270 and ASCII console icons. That cannot be used > as regular 3270 terminal.
Current HMCs have the "Integrated 3270" task which provide a 3270 terminal emulator which is accessible via remote HMC access. As you say, it's not a "regular" 3270 terminal because it connects to z operating systems neither via TCP/IP (as would a typical desktop 3270 emulator) nor as a local non-SNA 3270 device (as would an OSA-ICC-provided session). Although z/OS 2.1 introduces support for Integrated 3270, that's only as a console which doesn't get you the TSO access requested by the OP. However, z/VM supports the Integrated 3270 for a normal logon and, although it's usually used as a console, for z/VM a console isn't a special session and can be used for other activities...including making an outgoing telnet (i.e. tn3270) connection. That connection uses the usual z/VM networking (TCP/IP stack or, I suppose, SNA for those that still have z/VM hooked up to SNA) and can make a connection to the z/OS system of your choice on the network. (You could of course also DIAL to a z/OS instance running as a virtual machine under that z/VM - which is what I do - but it would also be fine to make that outgoing telnet to z/OS images running elsewhere.) So those who have a z/VM LPAR handy could indeed use remote access to the HMC to logon to a z/OS system if they particularly wanted. (For those that don't have z/VM, you could also bring up Linux in an LPAR and then use the Integrated ASCII terminal to login to that and use c3270 - the "curses" version of the x3270 3270 emulation suite - to make an outgoing connection to z/OS. But c3270 is rather unpleasant to use so that really would be just for emergencies.) --Malcolm -- Malcolm Beattie Linux and System z Technical Consultant, zChampion IBM UK Systems and Technology Group ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
