After configuration cust did not have access via Web to NetMaster.
Web browser: Internet Explorer 11.2312.14393.0 .
a) WebCenter (which does not work with https) was disabled via
&GLBL$WCOFF = YES on member $NMPARMS on
dsn.TESTEXEC (plus region recycle).
b) MTC-NM worked once cust set Enable Secure URL Prefix? =
NO on /PARMS group WEBCENTER.