User guide

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frame. Logical grouping of information sent as a link-layer unit.
Compare datagram, packet.
FTP. File Transfer Protocol. Application protocol that lets one IP
node transfer files to and from another node.
FTP server. Host on network from which clients can transfer
files.
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Hard MBytes. Setting the Hard MBytes parameter forces the
renegotiation of the IPSec Security Associations (SAs) at the
configured Hard MByte value.
The value can be configured between 1 and 1,000,000 MB and
refers to data traffic passed.
Hard Seconds. Setting the Hard Seconds parameter forces
the renegotiation of the IPSec Security Associations (SAs) at
the configured Hard Seconds value. The value can be config-
ured between 60 and 1,000,000 seconds.
A tunnel will start the process of renegotiation at the soft
threshold and renegotiation must happen by the hard limit or
traffic over the tunnel is terminated.
hardware handshake. Method of flow control using two con-
trol lines, usually Request to Send (RTS) and Clear to Send
(CTS).
header. The portion of a packet, preceding the actual data,
containing source and destination addresses and error-check-
ing fields.