CCc subcommand—Turn off integrity protection
Purpose
Use the CCc subcommand to turn off integrity protection on the control connection. This command must be integrity-protected, and must be preceded by a successful security mechanism negotiation.
Format
Parameters
There are no parameters for this subcommand.
Rule: Because turning
off integrity protection potentially enables an attacker to insert
commands onto the control connection, some FTP servers might refuse
to honor this command.
Restrictions: When the security mechanism is TLS, the following restrictions apply:
- The CCc subcommand is not supported when the connection is implicitly secured with a connection to the port that is configured with the TLSPORT statement.
- The CCc subcommand is supported only when the TLSRFCLEVEL is RFC4217 or CCCNONOTIFY.