MAC Citrix users are getting SSL Error 4: A Network error occurred white connecting Error #183

MAC users are able to connect to Citrix farm but get this message after a few minutes while working and then they get kicked off their session.  I have already tried to re-install the client with the latest version.  Users have been working for months prior to this occurring.  Users connect using a FireFox web log-in.  Any info would be appreciated, thanks!  
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Carl WebsterCitrix Technology Professional - FellowCommented:
Are you connecting directly to the Web Interface, thru Citrix Secure Gateway or Citrix Acces Gateway?

Who is the SSL certificate issued by?
elitegkAuthor Commented:
The Macs are connecting directly to the Web Interface although there are other PC users connecting through a Citrix Secure Gateway.  Cert is issued by
Carl WebsterCitrix Technology Professional - FellowCommented:
CSG and WI on the same server?  What is the SSL Port for WI?

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