How to send/receive HL7 message in socket using TLS

Question

Hi,
 
We developed an application to send/receive HL7 message between server and client via socket using TLS certificate. Its working well in same domain network (server and client), but cross networks is not working, that means... Server in one network domain and client is an another network domain, in this case connectivity has worked, but unable to send/receive the message. we are using TLS 1.2 v Certificate (self signed).
 
could someone help me on this, its an urgent task to me.
 
Note: In development environment is working fine, when I host the application in production, its not working and getting below error.
 
Error: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 192.168.1.435:2443
 
Please find the attached server & client code with TLS certificate(Self signed)
Thanks in advance.
 
Guru