2 AIX 4.1 support is ported from the SunOS code for ppp 2.2. It requires
3 a streams-based tty and will not work on AIX 3.2. This is the first
4 release of this package for AIX. It is provided free and without warranty
5 of any kind. I can't make any promise to support this, but if you e-mail
6 me with problems I'll try to help you. Please let me know about any bugs
11 PPP implements TCP/IP through serial connections. In ppp 2.2, an
12 interface is established by running the program 'pppd'. pppd opens
13 a serial connection, negotiates link attributes with the peer and
14 configures a TCP/IP interface. The interface remains up as long as
15 the peer stays up and 'pppd' remains running. There are no SMIT menus
16 and ppp interfaces can not be defined through ifconfig. An interface
17 can be brought down by killing pppd.
19 The program 'chat' processes send-expect sequences similar to UUCP
20 Dialers commands or a Systems chat string. It can be used to dial
23 'pppstats' prints interface statistics similar to netstat. Some of the
24 statistics are the same as netstat but pppstat also provides additional
25 info specific to ppp interfaces.
29 First execute the following commands in the ppp-2.2 directory:
32 make install (you need to be root for this)
34 By default, pppd, chat and pppstats are placed in /usr/sbin and the
35 streams modules in /usr/lib/drivers. The modules are loaded by the following
38 strload -m /usr/lib/drivers/ppp_if
39 strload -m /usr/lib/drivers/ppp_comp
40 strload -m /usr/lib/drivers/ppp_async
42 'make install' appends the strloads to /etc/rc.tcpip so the modules
43 will be loaded at boot. A 'pppd' command can be added to start
46 'make install' will also create /etc/ppp/options containing the option
47 'lock' only (lock tty device when in use). Any other options which will
48 always be used should be added by hand.
50 Man pages for pppd and pppstats are installed.
54 To answer a modem and accept connections, use something like
56 pppd tty1 myhostname:remotehostname persist
58 This will wait for calls on tty1 and establish a connection with any
59 ppp caller. The server will use myhostname and tell the caller
60 to use remotehostname. The persist option tells pppd to remain
61 active and accept another connection after the call terminates.
62 You can use the 'auth' option to force callers to authenticate
63 themselves. See pppd man page for details of authentication protocols.
65 To dial in to a user account and start PPP, use something like
67 pppd tty1 myhostname: connect 'chat -f /etc/ppp/chat-script'
69 where the file /etc/ppp/chat-script should contain something like
71 "" ATDT5551212 CONNECT "" ogin: myname sword: mypassword $ pppd
73 This command uses the chat program to dial the modem, log in and
74 start pppd on the server. No ttyname is needed when starting pppd on the
75 server side because pppd will attach to the current terminal (the tty line),
76 if no device is specified. Any pppd options needed can be set in ~/.ppprc
79 The chat -v option may be helpful in debugging connection failures. The
80 chat output and other debug messages are sent to syslog. You may need
81 to edit /etc/syslog.conf and "refresh -s syslogd" to see the debug messages.
83 The simplest way to allow a remote dial-in host to use your network is
84 to use the 'proxyarp' option on the server. This will cause the
85 server to publish an arp entry with the remote's IP address and the
86 server's hardware address. The remote will then appear to be part of
87 local network to other hosts. The address/netmask used by the remote
88 must be suitable for the subnet you wish to connect to. If the remote
89 is a standalone system, or has no other default route, use the
90 'defaultroute' option when dialing in. This will create a default route
91 on the remote system through the server. If the remote is on another
92 local network, you might not want this because it could conflict with
93 an existing default route.
95 These are just a few examples to help the new user get started. The
96 man page for pppd describes all the options in detail.