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Has anyone successfully implemented client authentication?  I know it gets
brought up occasionally, but I couldn't find any details in the archives.

I found the message Scott Klement sent referring me back to the one I sent
that has a link to IBM.  FYI, the procedure has changed since then!  We are
on V5R1 now, and to force client authentication you need to use DCM
application configuration.

I created a certificate authority and certificate.  Assigned the certificate
to the services I wished.  Turned on "require client authentication" and
restarted telnet.  I was denied a signon screen (finally!)

Then I created a user certificate, installed it in my browser, exported to a
file, imported into key manager.  I may have had to reboot at this point,
but after specifying "Use default" under client certificate, I got a signon.
So far, so good.

Then I went back to DCM and removed the assignment of the certificate to the
user.  No change - still get a signon.  So I deleted the certificate (just
to confuse the issue, I had created 2 certificates, so it seems I used
"remove" for one and "delete" for the other.)  No change, still able to get
a signon with the deleted certificate.  Ended and started telnet to be sure,
no effect.  Even rebooted, not that it should matter since I'm trying to get
the AS/400 to do the verification.

Is this correct behavior?  Once genereated, the AS/400 will trust the
certificate until expired even though it's been deleted?  Doesn't do much
for our security plan...

I have a few more docs to read, but if the above doesn't generate any
obvious answers, the next step appears to be enabling CRL and figuring out
how to publish the CRL to the LDAP server.  Then figure out how to revoke a
certificate.  And decide how to create certificates for all the users.

Luckily, I have a backup system to work on for testing, but I need to get
this going in production ASAP.

Any ideas will be greatly appreciated.  I've already skimmed through the
obvious Redbooks (Tips and Tools for Securing your iSeries, Deploying a
Public Key Infrastructure, Developing a Digital Certificate Infrastructure,
iSeries Security Reference)

Thanks!


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