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HP VPN Firewall Appliances System Management and Maintenance Configuration Guide

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Configuring TFTP
NOTE:
TFTP is not supported in FIPS mode.
TFTP can be configured only at the CLI.
Trivial File Transfer Protocol (TFTP) is a simplified version of FTP for file transfer over secure reliable
networks. TFTP uses UDP port 69 for connection establishment and data transmission. In contrast to
TCP-based FTP, TFTP requires no authentication or complex message exchanges, and is easier to deploy.
TFTP supports the following transfer modes:
• Binary mode—Used to transfer image files, such as .bin, and .btm files.
• ASCII mode—Used to transfer text files, such as .txt, .bat, and .cfg files.
The device can operate only as a TFTP client (see Figure 109) to upload or download fi
les.
Figure 109 TFTP application scenario
Prerequisites
Run a TFTP server program on the file host and set a TFTP working directory.
Configure IP addresses and routes to make sure the device and the TFTP server can reach each other.
Using the device as a TFTP client
The device provides the following modes for downloading a new file from a TFTP server:
• Normal download—The new file is written directly to the CF card and overwrites the old file that
has the same name as it. If file download is interrupted, both old and new files are lost.
• Secure download—The new file is downloaded to memory and will not be written to the CF card
until the whole file is obtained. A download failure does not affect the old file that has the same
name as the old file.
To avoid undesired file loss, use the secure download mode. If you use the normal download mode
because of insufficient memory, assign the new file a file name unique in the CF card.
You can use the tftp client source command to specify a source IP address or source interface for the TFTP
packets sent by the device. If a source interface (typically, a loopback interface) is specified, its primary
IP address is used as the source IP address for the TFTP packets. The source interface and source IP
address settings overwrite each other.