I hope I'm understanding what you are saying.

Localhost is for use ONLY within a single TCPIP stack or system. It is another 
way of writing non-routable IP address '127.0.0.1'.
Maybe configuring host files will allow you to do this but that will be very 
confusing and awkward to support.

You should NOT be using localhost to get from your device (PC or whatever) to 
the z/OS TCPIP stack.

You should configure a name for your ZOSMF IP address.
If you always run ZOSMF on the same z/OS system you may already have a suitable 
name in DNS for the system's static VIPA.
If you move ZOSMF between systems in the sysplex you will need a Dynamic 
Virtual IP Address (DVIPA) and an entry in DNS (or host files) for it.

I'm struggling to follow what you are saying about PuTTY for SSH and your Opera 
browser.

You might use your SSH connection to get to z/OS and work with USS and perform 
some configuration actions. You do not use PuTTY to logon to ZOSMF.

You should have a ZOSMF server certificate signed by a CA trusted by your 
browser.
This certificate should - probably must - include the DNS name as a subject 
alternate name.

When you make the HTTPS connection from the browser Opera will validate the 
security of the connection. That will include:
1. Check that it is indeed HTTPS and not HTTP
2. Check for TLS1.2 - lower levels of SSL / TLS are often not allowed these days
3. Check the ZOSMF server certificate Is signed by a CA trusted by Opera
4. Check certificate dates
5. Confirm the DNS you used to reach ZOSMF is named as a subject alternate name

Browsers have an icon to click showing why a connection is not secure. It will 
very likely be one of the steps above.

Some browsers allow you to allow connections with an untrusted certificate. 
That would be a bad security practice but may allow an initial connection.

Hope some of this helps. It is generic advice for any browser connection to 
z/OS.

Mike Wawiorko  


-----Original Message-----
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of 
Sean Gleann
Sent: 08 June 2020 14:15
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: AZD messages?


This message originated from outside our organisation and is from web based 
email - sean.gle...@gmail.com

As far as I understand things, 'localhost' is just another way of saying 
'127.0.0.1' meaning 'this computer', so - yes, localhost is defined.
I have an SSH connection defined in PuTTY that associates my local 10443 with 
the host system's 10443, and I start that connection before attempting to go to 
https://localhost:10443 in my browser (Opera).
I'm quite happy to be shown any error in my understanding, however.

But you've sparked off another train of thought, Lloyd.
Whilst it's true I get to my z/OSMF with 'https://localhost:10443/zosmf', the 
very first thing I see is a warning that the connection is not secure and I 
have to click on 'continue anyway' in order to get to the z/OSMF sign-on screen.
I think I've got to sort out *that* problem before trying to go any further.

Regards
Sean

,


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