telnetd.1m (2010 09)

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telnetd(1M) telnetd(1M)
Options
telnetd has the following options.
-b [bannerfile] Specify a file containing a custom banner. This option overrides the standard
tel-
netd login banner. For example, to use
/etc/issue as the login banner, have
inetd start telnetd with the following lines in
/etc/inetd.conf (\
provides
line continuation):
telnet stream tcp nowait root /usr/lbin/telnetd \
telnetd -b/etc/issue
To work in the IPv6 environment, the entry in
/etc/inetd.conf
would be:
telnet stream tcp6 nowait root /usr/lbin/telnetd \
telnetd -b/etc/issue
NOTE: tcp has changed to tcp6 for IPv6.
If bannerfile is not specified,
telnetd does not print a login banner.
-e Invoke login with all the environment variables passed to
telnetd.
-n Set the time-out value for the initial option negotiation in the
/etc/inetd.conf
file as:
telnet stream tcp nowait root /usr/lbin/telnetd \
telnetd -n240
This option informs telnetd how long it should wait before timing out and exiting
if it does not receive either a positive or negative reply for any of the initial option
negotiations. The time-out value is measured in seconds. This option is set with
integer values. The values range between 1 and 21474836. The default value is
120 seconds.
There should not be any space between the
-n option and the time-out value. For
example, -n240.
To work in the IPv6 environment, the entry in
/etc/inetd.conf
would be:
telnet stream tcp6 nowait root /usr/lbin/telnetd \
telnetd -n240
NOTE: tcp has changed to tcp6 for IPv6.
-s This option allows users to set the BUFFERSIZE value. This option, when set,
informs telnetd the number of user bytes to concatenate before sending to TCP.
This option is set with integer values. There is no specified default.
-t Enable the TAC User ID option. The system administrator can enable the TAC
User ID option on servers designated as participating hosts by having
inetd start
telnetd with the -t option in /etc/inetd.conf:
telnet stream tcp nowait root /usr/lbin/telnetd telnetd -t
To enable the TAC User ID option for IPv6, users must have inetd start telnetd
with the -t option in /etc/inetd.conf as shown below:
telnet stream tcp6 nowait root /usr/lbin/telnetd telnetd
-t
NOTE: tcp has changed to tcp6 for IPv6.
In order to make the TAC User ID option work as specified, the system administra-
tor must assign to all authorized users of the option the same login name and
unique user ID (UUID) on every participating system to which they are allowed
TAC User ID access. These same UUIDs should not be assigned to non-authorized
users.
Users cannot use the feature on systems where their local and remote UUIDs differ,
but they can always use the normal
telnet login sequence. Also, there may be a
potential security breach where a user with one UUID may be able to gain entry to
participating systems and accounts where that UUID is assigned to someone else,
unless the above restrictions are followed.
2 Hewlett-Packard Company − 2 − HP-UX 11i Version 3: September 2010