HP-UX System Administrator's Guide: Overview HP-UX 11i v3 (B3921-90011, September 2010)

NOTE: Before you can use any of the networking services, you need to configure at least one

network interface on your server. Use the nwmgr command to configure the interface. See the

nwmgr(1M) manpage and “Configuring a Network Interface” (page 107) for additional information.

Electronic Mail

Electronic mail (E-mail) systems generally have two functional layers:

• A transport and routing layer

• An E-mail client for reading, composing, and sending E-mail

For transporting and routing E-mail, HP-UX supports sendmail, a highly configurable and

widely used E-mail transport service. For information on configuring sendmail on an HP-UX

based server see the networking document: HP-UX Mailing Services Administrator’s Guide.

For reading, composing, and sending E-mail HP-UX offers the traditional UNIX E-mail clients:

mail

mailx

elm

Though not formally supported by HP, you can also use the following commonly used utilities

for reading, composing, and sending electronic mail:

Mozilla

Mozilla is shipped with HP-UX as it is needed as a default browser for accessing

the System Management Homepage. Mozilla includes a built-in E-mail client.

rmail

If you have installed and use the GNU Emacs editor, you can use its built in E-mail

client, rmail.

Remote Logins / Terminal Emulation

From an HP-UX shell you can log into a remote system using any of the following protocols if

they have been made available to you:

rlogin rlogin, a utility that runs on your local server, communicates with a daemon called

rlogind on the remote server, if it is running, to allow you to log into the remote

server if you have a valid account on that system.

IMPORTANT: The protocol supporting rlogin is not a secure protocol. Your login

information, including passwords and other information you enter during your login

session is sent over the network unencrypted! That information is at risk of being

intercepted and misused.

ssh ssh (Secure Shell) provides much more secure remote logins than does the rlogin

protocol. It authenticates the remote server (and allows the remote server to

authenticate your local server) by using public-key encryption. It uses encryption in

all communications with the remote server during your login session.

telnet As with rlogin, telnet generally uses unencrypted communications making your

closed network, among servers and users you trust, telnet is available on HP-UX

for your use. If secure communications between your local server and the remote

server you are trying to login to are important, use ssh.

File Transfers

There are several protocols available on HP-UX to transfer files between computers. Depending

on the protocol used, files can be transferred between HP-UX based systems, between an HP-UX

based system and a Linux based system, or between an HP-UX based system and a Microsoft

90 Major Components of HP-UX