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第 41 章 Stunnel - universal SSL tunnel

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.

  1. install

    $ sudo apt-get install stunnel4
    			
  2. 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

  3. 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		
    			
  4. start

    $ sudo /etc/init.d/stunnel4 start