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Homepage: http://www.stunnel.org/
Stunnel is a program that allows you to encrypt arbitrary TCP connections inside SSL (Secure Sockets Layer) available on both Unix and Windows. Stunnel can allow you to secure non-SSL aware daemons and protocols (like POP, IMAP, LDAP, etc) by having Stunnel provide the encryption, requiring no changes to the daemon's code.
install
$ sudo apt-get install stunnel4
enable stunnel
$ vim /etc/default/stunnel4 # /etc/default/stunnel # Julien LEMOINE <speedblue@debian.org> # September 2003 # Change to one to enable stunnel ENABLED=0 FILES="/etc/stunnel/*.conf" OPTIONS="" # Change to one to enable ppp restart scripts PPP_RESTART=0
edit /etc/default/stunnel4 file and change ENABLED=0 to ENABLED=1 to enable Stunnel
config
$ sudo vim /etc/stunnel/stunnel.conf [pop3s] accept = 995 connect = 110 [imaps] accept = 993 connect = 143 [ssmtp] accept = 465 connect = 25 [https] accept = 443 connect = 80
start
$ sudo /etc/init.d/stunnel4 start