I would guess it's that your server cert is SHA/1, and El Capitan refuses to 
let you use it. 

-- Jorj

Sent from my iPhone

> On Jul 18, 2016, at 11:12, Andrew Miller <ajmil...@engr.psu.edu> wrote:
> 
> I had mod_cosign working fine with Mac OS X Yosemite Server, but after 
> upgrade to El Capitan I’m seeing ssl errors with certificate validation. The 
> certs are all valid because they worked under the previous OS. 
> 
> 
> Initially I saw these five error messages:
> [Sun Jul 17 16:35:32.090667 2016] [:error] [pid 13173] mod_cosign: 
> snet_starttls: error:14090086:SSL 
> routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
> [Sun Jul 17 16:35:32.111515 2016] [:error] [pid 13173] mod_cosign: 
> snet_starttls: error:14090086:SSL 
> routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
> [Sun Jul 17 16:35:32.133292 2016] [:error] [pid 13173] mod_cosign: 
> snet_starttls: error:14090086:SSL 
> routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
> [Sun Jul 17 16:35:32.152370 2016] [:error] [pid 13173] mod_cosign: 
> snet_starttls: error:14090086:SSL 
> routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
> [Sun Jul 17 16:35:32.152474 2016] [:error] [pid 13173] mod_cosign: 
> cosign_cookie_valid: Unable to connect to any Cosign server.
> 
> 
> After adding my CosignHostName server to my /etc/hosts file there are only 
> two error messages:
> 
> [Sun Jul 17 16:37:44.480698 2016] [:error] [pid 13264] mod_cosign: 
> snet_starttls: error:14090086:SSL 
> routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
> [Sun Jul 17 16:37:44.480810 2016] [:error] [pid 13264] mod_cosign: 
> cosign_cookie_valid: Unable to connect to any Cosign server.
> 
> It seems like maybe some security feature in El Capitan is blocking Cosign 
> from doing DNS lookups. I cannot determine what other name is being looked up 
> by Cosign. I tried adding all the server names that might appear in any of my 
> certificates to no avail.
> 
> Any ideas of how to fix this?
> 
> --Andrew
> 
> ===================================================
> Andrew J. Miller
> Programmer/Analyst
> Department of Engineering Science & Mechanics
> Pennsylvania State University
> 212 Earth and Engineering Sciences Building
> University Park, PA 16802
> ===================================================
> 
> ------------------------------------------------------------------------------
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reports.http://sdm.link/zohodev2dev
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