04-29-2004
how to disable services
Aix 5, how can I disable, telnet, ftp and snmp?
Thanks
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LEARN ABOUT FREEBSD
kerberos
KERBEROS(8) BSD System Manager's Manual KERBEROS(8)
NAME
kerberos -- introduction to the Kerberos system
DESCRIPTION
Kerberos is a network authentication system. Its purpose is to securely authenticate users and services in an insecure network environment.
This is done with a Kerberos server acting as a trusted third party, keeping a database with secret keys for all users and services (collec-
tively called principals).
Each principal belongs to exactly one realm, which is the administrative domain in Kerberos. A realm usually corresponds to an organisation,
and the realm should normally be derived from that organisation's domain name. A realm is served by one or more Kerberos servers.
The authentication process involves exchange of 'tickets' and 'authenticators' which together prove the principal's identity.
When you login to the Kerberos system, either through the normal system login or with the kinit(1) program, you acquire a ticket granting
ticket which allows you to get new tickets for other services, such as telnet or ftp, without giving your password.
For more information on how Kerberos works, and other general Kerberos questions see the Kerberos FAQ at
http://www.nrl.navy.mil/CCS/people/kenh/kerberos-faq.html.
For setup instructions see the Heimdal Texinfo manual.
SEE ALSO
ftp(1), kdestroy(1), kinit(1), klist(1), kpasswd(1), telnet(1)
HISTORY
The Kerberos authentication system was developed in the late 1980's as part of the Athena Project at the Massachusetts Institute of Technol-
ogy. Versions one through three never reached outside MIT, but version 4 was (and still is) quite popular, especially in the academic commu-
nity, but is also used in commercial products like the AFS filesystem.
The problems with version 4 are that it has many limitations, the code was not too well written (since it had been developed over a long
time), and it has a number of known security problems. To resolve many of these issues work on version five started, and resulted in IETF RFC
1510 in 1993. IETF RFC 1510 was obsoleted in 2005 with IETF RFC 4120, also known as Kerberos clarifications. With the arrival of IETF RFC
4120, the work on adding extensibility and internationalization have started (Kerberos extensions), and a new RFC will hopefully appear soon.
This manual page is part of the Heimdal Kerberos 5 distribution, which has been in development at the Royal Institute of Technology in Stock-
holm, Sweden, since about 1997.
HEIMDAL
September 1, 2000 HEIMDAL