You can set up the BIG-IP system to load balance passive mode FTP traffic, with optimization of both the FTP control channel and the data channel.
By default, the BIG-IP system optimizes FTP traffic for the control channel, according to the configuration settings in the default client and server TCP profiles assigned to the virtual server. When you use this particular implementation, you also configure the system to take advantage of those same TCP profile settings for the FTP data channel. This provides useful optimization of the data channel payload.
You can perform these tasks to configure FTP passive mode load balancing that optimizes traffic on both the control channel and data channel.
Create a custom FTP monitor to verify passive mode File Transfer Protocol (FTP) traffic. The monitor attempts to download a specified file to the /var/tmp directory. If the file is retrieved, the check is successful.
|Passive||The monitor sends a data transfer request to the FTP server. When the FTP server receives the request, the FTP server initiates and establishes the data connection.|
|Port||The monitor initiates and establishes the data connection with the FTP server.|
|Yes||The system does nothing when the monitor check succeeds, and you must manually enable the monitored resource.|
|No||The system automatically re-enables the monitored resource after the next successful monitor check.|
|Yes||The system redirects error messages and other information to a log file created specifically for this monitor.|
|No||The system does not collect additional information or error messages related to this monitor. This is the default setting.|
A BIG-IP system with this configuration can process FTP traffic in passive mode, in a way that optimizes the traffic on both the control channel and the data channel. This optimization is based on the settings of the default client-side and server-side TCP profiles.