NAME

       fs_setcrypt - Enables of disables the encryption of AFS file transfers

SYNOPSIS

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

DESCRIPTION

       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 on Windows. It is disabled on all non-Windows
       clients by default. You may enable encryption by default on non-Windows platforms by
       executing fs setcrypt -crypt on immediately after the client daemon starts. For example,
       on Linux, you can do this within the SysV init script, or with systemd's ExecStartPost
       parameter.

       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.

CAUTIONS

       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.

OPTIONS

       -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 omitted.

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

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

OUTPUT

       This command produces no output other than error messages.

EXAMPLES

       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.

PRIVILEGE REQUIRED

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

SEE ALSO

       fs_getcrypt(1)

       The description of the fcrypt encryption mechanism at
       <http://surfvi.com/~ota/fcrypt-paper.txt>.

COPYRIGHT

       Copyright 2007 Jason Edgecombe <jason@rampaginggeek.com>

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