Installing and Administering PPP

Chapter 2 39

Setting Up PPP Connections

Testing the Connection

When PPP is installed, conﬁgured, running and connected on both ends

of the link, users should be able to access each peer machine using any

TCP/IP application such as telnet, ftp, etc. Once you have conﬁgured the

PPP connection on both the local and remote systems, follow these steps

to test the outbound connection.

1. Either reboot your machine or run /etc/ppp/Autostart to start

pppd.

2. Check to make sure pppd was started:

# more /var/adm/pppd.log

8/4-14:14:43-14902 PPP

8/4-14:14:43-14902 Version 2.0

8/4-14:14:43-14902 du0: pppd robin:lark auto idle 150

3. Use telnet to bring up the link and type ^D (Ctrl-Shift-D) to exit the

the phone, the modems establish a carrier, the Systems chat script

completes, the answering pppd is started on the remote system and

the two pppd’s negotiate. For example:

# telnet lark

Trying lark...

Pause

Connected to lark.

Escape character is '^]'.

(Operating system) (lark) (ttyp3)

lark login: ^Dconnection closed by foreign host.

The log ﬁle will be appended to and will show how the link was initiated:

8/4-14:14:53-14902 tcp 137.175.2.11/1204 -> 131.187.1.131 telnet

40 syn bringup

8/4-14:14:54-14902 Dialing lark (cuh00 38400 5551212 T1600)

8/4-14:15:23-14902 PPP connected to 131.187.1.131

This log ﬁle snippet shows that the telnet session to lark caused the link

to be initiated.

If either machine is connected to a local area network, you can set up IP

routing on the two networks so that hosts on either network can

communicate with hosts on the other, using machines on the ends of the

PPP links as routers.