home *** CD-ROM | disk | FTP | other *** search
- Date: Sat, 13 Apr 1996 20:15:17 -0700 (PDT)
- From: Nobody <rmarc@netcom.com>
- Subject: Serial ISDN using MLPPP
-
- R Marc Phillips | Need and be abandoned.
- rmarc@netcom.com| Hope and be denied.
- Semi-Psychotic | Love and be destroyed.
- Mostly Confused | -me
-
- This is a basic guide to using ppp over an external ISDN device. As of
- yet there are no drivers that I know of for ISDN cards readily available
- in the USA. This is a guide to ISDN over a serial port.
-
- The first thing you'll need is PPP compiled on your linux system. With
- most releases of Linux Slackware, it is an option on recompiling and
- sometimes installing. If you don't have it you can get the latest BETA from:
-
- ftp.funet.fi:/pub/Linux/BETA/ppp/ppp-2.2
-
- Note that this is for later kernels (1.3.8x and above) for earlier kernels
- you may want to look for ppp2.2.0d or e. A search on www.yahoo.com for ppp
- should yield something.
-
- Once you have that installed and functional (you can usual see if it's
- functional, if you're not sure, by just typing pppd at a prompt. You'll
- then see a bunch of garbage start scrolling across your screen. This
- means you have it installed. It'll time out in a minute or two or you
- can go to another virtual terminal and kill the process.).
-
- Now you'll want to make a pap-secrets file. This is a file that simply
- contains you username and password. PAP stands for Password
- Authentication Protocol which is a function of PPP and a required
- component of MultilinkPPP as defined in the RFC documentation on
- Multilink protocols:
-
- http://www.cis.ohio-state.edu/htbin/rfc/rfc1356.html
-
- I'd advise that you put this file in /etc/ppp and call it something like
- pap or pap-secrets. What you name it really doesn't matter. The file
- should have two lines in it. The first line containing your username
- and the second containing your password.
-
- Once you've done that, you can try out a PPP connection. The easiest way
- would be to make a file called "pppfix" or something (again, it can be
- called whatever you want). Here is an example:
-
- #!/bin/sh
- pppd modem crtscts defaultroute +ua [path to pap file] connect 'chat \
- ABORT BUSY ABORT ERROR "" AT[init string] OK ATD[ISP's Phone #] CONNECT' \
- [your comm port] 115200
-
- There are two parts to this, the pppd component and the chat component.
-
- I've put anything that you need to decide upon in square brackets. You
- need to replace those with the appropriate information. Say you made a
- file in your /etc/ppp directory called "pap" that contains your username
- and password. You'd put in /etc/ppp/pap replacing "[path to pap file]."
- For "[init string]" you'll want to put in the appropriate string for
- MultilinkPPP (this will work equally as well for a modem, so if you want
- to use your modem put in a string for it). You can look in your manual
- to find the appropriate string. I'll give a few:
-
- For a 3com impact put in: s71=1s80=1&d2
- For a Bitsurfer put in: %a2=92@b0=2&d2
- For a Bitsurfer Pro: %a2=92@b0=2@m2=p&d2
- For an Adtran ISU express: s54=12&d2
-
- Add whatever else you would normally for your box, but these are what is
- necessary for MultilinkPPP plus the &d2 which will insure that your box
- will hang up when you disconnect. Some TA's have a hard time hanging up
- without that &d2 (especially the Bitsurfer and Bitsurfer pro)
-
- After the ATD you put in your ISP's ISDN phone number in replace of
- "[ISP's Phone #]." (note that with the Bitsurfer and Bitsurfer pro it is
- necessary to tell the TA to dial the same number twice seperated by an "&."
- It is not necessary to put in an escape character).
-
- Where you see "[your comm port]" you'll need to replace that with the
- appropriate comm port. In most cases that will be /dev/cuaX where the X
- is a number between 0 and 3. 0 being comm1 and 3 being comm4.
-
- Now make the file executable by typing "chmod 755 <filename>" or
- whatever you'd like the permissions to be (700 if you only want root to
- have rights to it). You'll want to also make sure that your pap file
- is readible to whomever is running the pppd process so that it'll log in. To
- run it you'd simply type the name of the file.
-
- When you run this it should connect and then you can type "ifconfig" at
- your prompt. You should see that you have an "inet addr" under "Link
- encap: Point-Point Protocol" like so:
-
- lo Link encap:Local Loopback
- inet addr:127.0.0.1 Bcast:127.255.255.255 Mask:255.0.0.0
- UP BROADCAST LOOPBACK RUNNING MTU:2000 Metric:1
- RX packets:132 errors:0 dropped:0 overruns:0
- TX packets:132 errors:0 dropped:0 overruns:0
-
- ppp0 Link encap:Point-Point Protocol
- inet addr:204.31.114.199 P-t-P:163.179.20.26 Mask:255.255.255.0
- UP POINTOPOINT RUNNING MTU:1500 Metric:1
- RX packets:47 errors:0 dropped:0 overruns:0
- TX packets:62 errors:0 dropped:0 overruns:0
-
- To hang up, kill the process. If you don't know how to do that type "man
- ps" and then "man kill" and read.
-
- Here's an example:
-
- kill `ps -x | grep pppd | head -1 | cut -c2-5`
-
- You should then write scripts to manage your ppp connections.
-
- This is only one way to do it, there are others. You can download some
- scripts for this from the following ftp site:
-
- ftp.netcom.com/ftp/pub/rm/rmarc/lnxstuff.zip
-
- There's a readme file with it. I didn't write these scripts and they are
- not the ones I use. They are nice for a beginner and do not use PAP so
- you'll have to modify them if you want to do MultilinkPPP.
-
-
- Have fun.
-
-