Casio Naurtech CETerm Ver.5.5 User Manual - Manual (Page 43)

N AURTECH E MULATORS & W EB B ROWSER FOR W INDOWS CE / W INDOWS M OBILE
CETerm | CE3270 | CE5250 | CEVT220 Page 43
Skip User Authentication: When enabled, CETerm will not negotiate user
authentication with the SSH server. In most cases this will prevent a connection.
This option is Off by default.
Cache Decrypted User Keys: When enabled, CETerm will retain a private copy
of any user keys that have been unlocked with a user passphrase. Subsequent
requests for the key will be served automatically and will not require the user to
re-enter the passphrase. CETerm does not retain the passphrase. The cached
key may be used with multiple sessions and will be erased when CETerm exits
or if this option is changed to Off. This option is global and is common to all
sessions. The default value is Off.
NOTE: While this renegotiation is taking place, no data can pass through the
SSH connection, so the session may appear to ‗freeze‘ momentarily. This is a
short period when the key exchange is taking place.
Re-Key Every 60 Minutes: A shared session key is used by the encryption
protocol. If used too long, the session key may be subject to attack and expose
the SSH connection. Although such an attack is unlikely, it is wise to re-
exchange the key every so often. This can be initiated either by the client or the
server. Enabling this option will trigger CETerm to exchange a new key with the
server every 60 minutes. This option is On by default.
Re-Key Every 1G of Traffic: A shared session key is used by the encryption
protocol. If used for a large volume of traffic, the session key may be subject to
attack and expose the SSH connection. Although such an attack is unlikely, it is
wise to re-exchange the key after a significant amount of data. Enabling this
option will trigger CETerm to exchange a new key with the server following a total
data flow of 1 Gigabyte in either direction. This option is On by default.
Enable Compression: Enabling this setting will compress all data exchanged
over the SSH connection. We do not recommend using compression for
standard interactive sessions. By default, this setting is Off.
Enable Verbose messages: When enabled, the user is informed of major errors
which affect the SSH connection via a popup dialog. Some additional
information is presented within the emulation screen. This option is On by
default.
Allow IPV4: Enable this option to allow the IPv4 Internet Protocol addressing
scheme. The default is On.
Allow IPV6: Enable this option to allow the IPv6 Internet Protocol addressing
scheme. The default is Off.
Note: If neither IPv4 or IPv6 options is selected, CETerm will use IPv4. If both are
selected, CETerm will first attempt IPv6 and fall back to IPv4 if it is unsuccessful
connecting with IPv6.
Use TCP No-Delay (Advanced): Under normal operation, the TCP
communication stack performs data packet batching. Enable this option forces
the TCP stack to send immediately without batching data packets. This can result
in excessive traffic of short packets. We recommend leaving this option Off. It is
Off by default.