Hi, I have not run midas on Centos-8 yet. Maybe there is a problem with the openssl library there. The Centos-7 
instructions for setting up apache httpd proxy are here, with luck they work on centos-8:
https://daq.triumf.ca/DaqWiki/index.php/SLinstall#Configure_HTTPS_server_.28CentOS7.29

K.O.


> Hi Konstantin,
> Thanks for your reply, 
> 
> > What Linux? (on most linuxes, run "lsb_release -a")
> > What version of midas? (run odbedit "ver" command)
> I am using CentOS 8
> 
> > What version of firefox? (from the "about firefox" menu)
> Firefox 71.0
> 
> Thanks 
> Mehran
> 
> > No you cannot fix it from inside firefox. The issue is that the overlap of encryption methods
> > supported by your firefox and by your openssl library (used by mhttpd) is an empty set.
> > No common language, so to say, communication is impossible.
> > 
> > So either you have a very old openssl but very new firefox, or a very new openssl but very old 
> > firefox. Both very old or both very new can talk to each other, difficulties start with greater  
> > difference in age, as new (better) encryption methods are added and old (no-longer-secure) 
> > methods are banished.
> > 
> > BTW, for good security we recommend using apache httpd as the https proxy (instead of built-in 
> > https support in mhttpd). (I am not sure what it says in the current documentation). (But apache 
> > httpd will use the same openssl library, so this may not solve your problem. Let's see what 
> > versions of software you are using, per questions above, first).
> > 
> > K.O.