ThinkCore W311/321/341 Linux User’s Manual
Managing Communications
4-14
Example 2: Connecting to a PPP server over a hard-wired link
If a username and password are not required, use the following command (note that
noipdefault
is
optional):
#pppd connect ‘chat –v “ “ “ ‘
noipdefault
/dev/ttyM0 19200 crtscts
If a username and password is required, use the following command (note that
noipdefault
is
optional, and
root
is both the username and password):
#pppd connect ‘chat –v “ “ “ ‘ user
“
“
root
password
root noipdefault
/dev/ttyM0 19200 crtscts
How to check the connection
Once you’ve set up a PPP connection, there are some steps you can take to test the connection.
First, type:
/sbin/ifconfig
(The folder
ifconfig
may be located elsewhere, depending on your distribution.) You should be
able to see all the network interfaces that are UP. ppp0 should be one of them, and you should
recognize the first IP address as your own, and the “P-t-P address” (or point-to-point address) the
address of your server. Here’s what it looks like on one machine:
lo
Link encap Local Loopback
inet addr 127.0.0.1 Bcast 127.255.255.255 Mask 255.0.0.0
UP LOOPBACK RUNNING MTU 2000 Metric 1
RX packets 0 errors 0 dropped 0 overrun 0
ppp0 Link encap Point-to-Point Protocol
inet addr 192.76.32.3 P-t-P 129.67.1.165 Mask 255.255.255.0
UP POINTOPOINT RUNNING MTU 1500 Metric 1
RX packets 33 errors 0 dropped 0 overrun 0
TX packets 42 errors 0 dropped 0 overrun 0
Now, type:
ping z.z.z.z
where z.z.z.z is the address of your name server. This should work. Here’s what the response
could look like:
5
6
1
.
1
.
7
6
.
9
2
1
g
n
i
p
p
$
~
:
n
o
t
g
n
i
d
d
a
w
PING 129.67.1.165 (129.67.1.165): 56 data bytes
64 bytes from 129.67.1.165: icmp_seq=0 ttl=225 time=268 ms
64 bytes from 129.67.1.165: icmp_seq=1 ttl=225 time=247 ms
64 bytes from 129.67.1.165: icmp_seq=2 ttl=225 time=266 ms
^C
-
-
-
s
c
it
s
it
a
t
s
g
n
i
p
5
6
1
.
1
.
7
6
.
9
2
1
-
-
-
3 packets transmitted, 3 packets received, 0% packet loss
s
m
8
6
2
/
0
6
2
/
7
4
2
=
x
a
m
/
g
v
a
/
n
i
m
p
ir
t-
d
n
u
o
r
$
~
:
n
o
t
g
n
i
d
d
a
w
Try typing:
netstat –nr
