If you generate multiple certs with the same serial number, Firefox (and anything built 
with NSS) will absolutely refuse to have anything to do with those sites.  There's no 
"click 3 times to get access", it's a simple refusal to talk with a 
non-standards-compliant server.  (Of course, this puts the owner of the site in a lurch, 
because he doesn't run the CA in the vast majority of circumstances.)

Other TLS clients and browsers likely will do the same.  I haven't checked 
though.

-Kyle H

On Wed, Sep 15, 2010 at 1:34 PM, Andy GOKTAS <andy.gok...@state.or.us> wrote:
Hello,

Just curious if anyone knows, but what happens if I generate multiple server 
certs (using my self generated signing CA using openssl) that have the same 
assigned serial number?

Does this create a conflict within the network and if users's end up accessing 
both certs, kaboooom?

Is it merely a method of basic tracking on how many certificates a CA signs?

Thanks,
Andy Goktas
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