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I can't get the Citrix Receiver to work on Ubuntu 17.10. (SSL connection couldn't be established)

I tried different versions and copying the certificates from Mozilla as described here and here and ran ctx_rehash. Another answer suggests to convert a .crt file to .pem.

It's not clear to me though which file is meant and how to get it. I connected to citrix via browser (which works), exported the certificate from the page info/security, converted it to .pem and rehashed. Doesn't work though

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I'm having the same problem. And also tried to copy the certificates to /opt/Citrix/ICAClient/keystore/cacerts. I know the certificates work because I need them for browsing the internet (corporate firewall). Firefox and Chromium accept the certificates. Using openssl I found out that the certificates were already in pem format.

When making a connection to the Citrix storefront web page, I don't have a problem. The session starts fine.

edit:

The line below fixed it for me.

$ sudo c_rehash /opt/Citrix/ICAClient/keystore/cacerts/

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    OP indicated they rehashed without success. – Thomas Ward Feb 9 '18 at 17:18
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I managed to connect by exporting the certificate manually from the browser:

  • go to the citrix site
  • view certificate
  • export the certificate. the correct one is one above the actual adress
  • convert from .crt to .pem
  • rehash
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You should simply re-use the certificates already installed with the ca-certificates package, e.g.

$ cd /opt/Citrix/ICAClient/keystore/
$ sudo rm -r cacerts
$ sudo ln -s /etc/ssl/certs cacerts

No conversion and rehashing needed.

See Citrix receiver 13.10 on Ubuntu 18.04.1 for background reading (and why this is safe).

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