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       fs_setcrypt - Enables of disables the encryption of AFS file transfers


       fs setcrypt [-crypt] <on/off> [-help]


       The fs setcrypt command sets the status of network traffic encryption
       for file traffic in the AFS client. This encryption applies to file
       traffic going to and coming from the AFS File Server for users with
       valid tokens.  This command does not control the encryption used for
       authentication, which uses Kerberos 5 or klog/kaserver. The complement
       of this command is fs getcrypt, which shows the status of encryption on
       the client.

       The default encryption status is enabled.

       This is a global setting and applies to all subsequent connections to
       an AFS File Server from this Cache Manager. There is no way to enable
       or disable encryption for specific connections.


       AFS uses an encryption scheme called fcrypt, based on but slightly
       weaker than DES, and there is currently no way to specify a different
       encryption mechanism. Because fcrypt and DES are obsolete, the user
       must decide how much to trust the encryption. Consider using a Virtual
       Private Network at the IP level if better encryption is needed.

       Encrypting file traffic requires a token. Unauthenticated connections
       or connections authorized via IP-based ACLs will not be encrypted even
       when encryption is turned on.


       -crypt <on/off>
           This is the only option to fs setcrypt. The -crypt option takes
           either "on" or "off". "on" enables encryption. "off" disables
           encryption. Since this is the only option, the "-crypt" flag may be

           0 and 1 or "true" and "false" are not supported as replacements for
           "on" and "off".

           Prints the online help for this command. All other valid options
           are ignored.


       This command produces no output other than error messages.


       There are only four ways to invoke fs setcrypt.  Either of:

          % fs setcrypt -crypt on
          % fs setcrypt on

       will enable encryption for authenticated connections and:

          % fs setcrypt -crypt off
          % fs setcrypt off

       will disable encryption.


       The issuer must be logged in as the local superuser root.



       The description of the fcrypt encryption mechanism at


       Copyright 2007 Jason Edgecombe <>

       This documentation is covered by the BSD License as written in the
       doc/LICENSE file. This man page was written by Jason Edgecombe for