Dell Wyse Enhanced Ubuntu Linux T50 Manual de usuario descargar pdf (Pagina 66)

Chapter 7. The ThinLinc Client

Description of security tab settings

Here follows detailed description of the settings available in the security tab.

SSH Port

This option selects the TCP/IP port to use when the client tries to establish an SSH connection with

the ThinLinc server. The normal SSH port is 22, which also is the default selection for this option.

There can be reasons to use another port on some occasions. If you for example need to use

ThinLinc over the Internet, from a location where port 22 is blocked by a ﬁrewall. Then you can

select a port that is let open. Port 80 which is used for HTTP, the protocol used for transport when

surﬁng the WWW is one port that often is open. To be able to use a port other than 22 you need to

make sure that the SSH daemon (sshd), which runs on the ThinLinc server, listens to the port you

want to use. The SSH daemon can be told to listen to any wanted ports. In the client interface you

can select between the default port 22, port 80 and an arbitrary port number which you can enter by

yourself.

Note about SSH host key updates: If the SSH host key on the server changes, e.g. due to an

upgrade of the OS or SSH server software, the client will note this fact. It will then, at the next

then the host key on the client for this particular server is updated on disk.

The administrator can disallow this by manually setting the parameter ALLOW_HOSTKEY_UPDATE

to 0. See Section 7.7 for more information.

Password

This option makes the client try to authenticate using a regular password.

Public key

This option makes the client try to authenticate using public key encryption. The user will be asked

to provide a private encryption key instead of a text password.

Smart card

This option makes the client try to authenticate using public key encryption, but with the private key

securely stored on a smart card. The user will be asked to select a certiﬁcate on the smart card and

to provide the passphrase for it.

Note: Smart card authentication requires that the smart card is readable by your PKCS#11

library. The library included by default supports PKCS#15 compliant smart cards and relies on

the PC/SC interface. This is always present on Windows systems and is usually installed by

default on Linux systems. On Solaris this is a third-party add-on.

The "Details..." button lets you change the options for smart card usage and managing the certiﬁcate

ﬁlters which are used to match accepted certiﬁcates for authentication.

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Dell Wyse Enhanced Ubuntu Linux T50 Manual de usuario Pagina 66