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Hi,
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FS_SETCRYPT(1) AFS Command Reference FS_SETCRYPT(1)
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.
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 <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.
OpenAFS 2012-03-26 FS_SETCRYPT(1)
01-14-2009
