mirror of
https://git.FreeBSD.org/ports.git
synced 2024-11-14 23:46:10 +00:00
c42cc3ec22
(2) Reorganize MASTER_SITEs
(3) Remove reference to Phil Karn's ssh speedups, it is now distributed
as a full source package, and not a patch kit. If we want to use it,
we will have to make a new port for it.
(4) Use ${ECHO} instead of echo, ${RM} instead of rm, ${LN} instead of ln
(5) Use ${FALSE} instead of false
(6) Remove multiple blank lines in Makefile
(7) Remove trailing blank lines in pkg/DESCR
Submitted by: Alex Perel <veers@disturbed.net> (1, 2, 4, 6)
Bill Fumerola <billf@FreeBSD.org> (3, 5, 7)
99 lines
4.8 KiB
Plaintext
99 lines
4.8 KiB
Plaintext
Secure Shell is a program to log into another computer over a network,
|
|
to execute commands in a remote machine, and to move files from one
|
|
machine to another. It provides strong authentication and secure
|
|
communications over insecure channels. It is inteded as a replacement
|
|
for rlogin, rsh, and rcp.
|
|
|
|
FEATURES
|
|
|
|
o Complete replacement for rlogin, rsh, and rcp.
|
|
|
|
o Strong authentication. Closes several security holes (e.g., IP,
|
|
routing, and DNS spoofing). New authentication methods: .rhosts
|
|
together with RSA based host authentication, and pure RSA
|
|
authentication.
|
|
|
|
o Improved privacy. All communications are automatically and
|
|
transparently encrypted. RSA is used for key exchange, and a
|
|
conventional cipher (normally IDEA, DES, or triple-DES) for
|
|
encrypting the session. Encryption is started before
|
|
authentication, and no passwords or other information is
|
|
transmitted in the clear. Encryption is also used to protect
|
|
against spoofed packets.
|
|
|
|
o Secure X11 sessions. The program automatically sets DISPLAY on
|
|
the server machine, and forwards any X11 connections over the
|
|
secure channel. Fake Xauthority information is automatically
|
|
generated and forwarded to the remote machine; the local client
|
|
automatically examines incoming X11 connections and replaces the
|
|
fake authorization data with the real data (never telling the
|
|
remote machine the real information).
|
|
|
|
o Arbitrary TCP/IP ports can be redirected through the encrypted channel
|
|
in both directions (e.g., for e-cash transactions).
|
|
|
|
o No retraining needed for normal users; everything happens
|
|
automatically, and old .rhosts files will work with strong
|
|
authentication if administration installs host key files.
|
|
|
|
o Never trusts the network. Minimal trust on the remote side of
|
|
the connection. Minimal trust on domain name servers. Pure RSA
|
|
authentication never trusts anything but the private key.
|
|
|
|
o Client RSA-authenticates the server machine in the beginning of
|
|
every connection to prevent trojan horses (by routing or DNS
|
|
spoofing) and man-in-the-middle attacks, and the server
|
|
RSA-authenticates the client machine before accepting .rhosts or
|
|
/etc/hosts.equiv authentication (to prevent DNS, routing, or
|
|
IP-spoofing).
|
|
|
|
o Host authentication key distribution can be centrally by the
|
|
administration, automatically when the first connection is made
|
|
to a machine (the key obtained on the first connection will be
|
|
recorded and used for authentication in the future), or manually
|
|
by each user for his/her own use. The central and per-user host
|
|
key repositories are both used and complement each other. Host
|
|
keys can be generated centrally or automatically when the software
|
|
is installed. Host authentication keys are typically 1024 bits.
|
|
|
|
o Any user can create any number of user authentication RSA keys for
|
|
his/her own use. Each user has a file which lists the RSA public
|
|
keys for which proof of possession of the corresponding private
|
|
key is accepted as authentication. User authentication keys are
|
|
typically 1024 bits.
|
|
|
|
o The server program has its own server RSA key which is
|
|
automatically regenerated every hour. This key is never saved in
|
|
any file. Exchanged session keys are encrypted using both the
|
|
server key and the server host key. The purpose of the separate
|
|
server key is to make it impossible to decipher a captured session by
|
|
breaking into the server machine at a later time; one hour from
|
|
the connection even the server machine cannot decipher the session
|
|
key. The key regeneration interval is configurable. The server
|
|
key is normally 768 bits.
|
|
|
|
o An authentication agent, running in the user's laptop or local
|
|
workstation, can be used to hold the user's RSA authentication
|
|
keys. Ssh automatically forwards the connection to the
|
|
authentication agent over any connections, and there is no need to
|
|
store the RSA authentication keys on any machine in the network
|
|
(except the user's own local machine). The authentication
|
|
protocols never reveal the keys; they can only be used to verify
|
|
that the user's agent has a certain key. Eventually the agent
|
|
could rely on a smart card to perform all authentication
|
|
computations.
|
|
|
|
o The software can be installed and used (with restricted
|
|
functionality) even without root privileges.
|
|
|
|
o The client is customizable in system-wide and per-user
|
|
configuration files. Most aspects of the client's operation can
|
|
be configured. Different options can be specified on a per-host basis.
|
|
|
|
o Automatically executes conventional rsh (after displaying a
|
|
warning) if the server machine is not running sshd.
|
|
|
|
o Optional compression of all data with gzip (including forwarded X11
|
|
and TCP/IP port data), which may result in significant speedups on
|
|
slow connections.
|