-PPP for Linux Version 2.2.0
+PPP for Linux Version 2.3.3
============= based on
- ppp-2.2.0
- Mar 1995
+ ppp-2.3.3
+ Dec 1997
Michael Callahan callahan@maths.ox.ac.uk
Al Longyear longyear@netcom.com
+Paul Mackerras Paul.Mackerras@cs.anu.edu.au
Contents:
INTRODUCTION
CREDITS
- CHANGES FROM THE PREVIOUS VERSION
- FUTURE PLANS
INSTALLATION
PROBLEMS WHICH MAY OCCUR WHILE BUILDING THE KERNEL
A REFERENCE TO UNDEFINED _mod_use_count_
This file is substantially derived from the previous version for the
pppd process 2.2.0, which itself was derived from earlier works by
Michael Callahan. This particular version was written, modified,
-hacked, changed, whatever, by Al Longyear. If you find errors in this
-document, they are probably mine and not Michael's.
+hacked, changed, whatever, by Al Longyear and Paul Mackerras. If you
+find errors in this document, they are probably ours and not
+Michael's.
This is a PPP driver for Linux. It has been used by many people and
seems to be quite stable. It is capable of being used either as a
-CHANGES FROM THE PREVIOUS VERSION
-
-- The kernel debug value has changed. Previously it was a level. It is now
- a bit map with various bits meaning certain types of debug information.
-
- 0 - No debug information is generated
- 1 - Debug messages
- 2 - Log incoming packets
- 4 - Log outgoing packets
- 8 - Log tty output buffers
- 16 - Log tty input buffers
-
- If you wish to use any combination, add the values together. For example,
- '7' will log debug messages and incoming packages and outgoing packets.
-
- The default setting is 0.
-
- The simple IP trace which ppp.c performed when 'kdebug' was greater than
- 127 has been removed. You should use tcpdump for this type of trace
- actions.
-
-- Support is added for compression control protocol. At the present time
- the BSD-Compress and 'deflate' compression protocols are supported. A
- testing version of the predictor-1 compression protocol was developed but
- it is not included in this package due to unfortunate Motorola patent
- considerations.
-
-
-FUTURE PLANS
-
-These are to be determined.
-
-
-
INSTALLATION
-This version of PPP has been tested on kernel version 1.3.100. It will
-probably not work on kernels much earlier than this due to earlier problems
-with the kernels. If you have an earlier kernel, please upgrade to the 2.0
-kernel (when it is available).
+This version of PPP has been tested on various Linux kernel versions
+(most recently 2.0.30 and 2.1.24). It will probably not work on
+kernels before 2.0.0. If you have an earlier kernel, please upgrade to
+the latest 2.0 kernel.
joining the PPP channel of linux-activists:
a kernel, then you should read the README file in the kernel source
directory.
-If you wish module support then you need to have the 'modules-1.1.87'
+If you wish module support then you need to have the 'modules-2.0.0'
package installed as the minimum version. Earlier versions of the module
support will not work properly. All of the later ones will.
-As of this time, the current version for the modules package is
-1.2.0. Even 1.1.87 is old. However, if you only have 1.1.87 then it
-will do as it permits the symbol table references. Please consider
-upgrading the module package however.
-
Instructions on building the kernel with modules are given in the
README.modules in the kernel source directory.
be loaded to use the compressor and the VJ header compression code must be
loaded to use ppp.o.
-You may elect not to load the BSD compression module if you desire. There
-is a controversy regarding a Motorola software patent and while it is
-believed that this code does not infringe upon the patent, it is however
-an optional component.
-
-The deflate compressor has been stated by Morotola to not infringe upon
-their patent. However, it is also new. You may not find many systems which
-use this compressor.
+You may elect not to load the BSD compression module if you desire.
+The LZW compression algorithm (as used by BSD-Compress and the
+`compress' command) is claimed to be covered by a patent held by
+Unisys in the USA and other countries.
In addition, if memory is a premium, do not run the compressors. It
may take large amounts of memory (up to 2.6 meg) for high compression
PROBLEMS WHICH MAY OCCUR WHILE BUILDING THE KERNEL
-At this time with the 1.3.100 and pre-2.0 series kernels, soon to have the
-2.0 series kernel, there should not be a problem with the compilation of the
+At this time there should not be a problem with the complication of the
drivers.
TX packets 0 errors 0 dropped 0 overrun 0
ppp0 Link encap Point-to-Point Protocol
- inet addr 192.76.32.2 P-t-P 129.67.1.165 Mask 255.255.255.0
+ 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
modem
crtscts
lock
-:192.1.2.23
+:192.1.2.33
-Here we will insist that the remote machine use IP address 192.1.2.23,
+Here we will insist that the remote machine use IP address 192.1.2.33,
while the local PPP interface will use the IP address associated with
this machine's hostname in /etc/hosts. The '-detach' option is required
for a server. It tells the pppd process not to terminate until the modem
option to pppd on the server. Suppose, for example, we have this
setup:
- 192.1.2.23 192.1.2.17
+ 192.1.2.33 192.1.2.17
+-----------+ PPP link +----------+
| chelseapc | ------------------- | billpc |
+-----------+ +----------+
modem
crtscts
lock
-192.1.2.17:192.1.2.23
+192.1.2.17:192.1.2.33
proxyarp
When the link comes up, pppd will enter a "proxy arp" entry for
chelseapc into the arp table on billpc. What this means effectively
is that billpc will pretend to the other machines on the 192.1.2.x
Ethernet that its Ethernet interface is ALSO the interface for
-chelseapc (192.1.2.23) as well as billpc (192.1.2.17). In practice
+chelseapc (192.1.2.33) as well as billpc (192.1.2.17). In practice
this means that chelseapc can communicate just as if it was directly
connected to the Ethernet.
projects / ppp.git / blobdiff