i can use "natively" openssl for anonymous chat:

# Chat: # server side: openssl req -x509 -nodes -days 365 -newkey rsa:8192 -keyout mycert.pem -out mycert.pem

# server side - generate a self-signed cert. openssl s_server -accept 52310 -cert mycert.pem

# client side - "127.0.0.1" is the IP of the server openssl s_client -connect 127.0.0.1:52310

1) but how can i set it to require username/password? it would be a great chat tool 2) how can i transfer files with openssl? [again: with username/password?]

thank you for any ideas :\

p.s.: or it will be a firewall rule, to restrict to ip addresses in a list? those, who are only allowed to connect..