Subject:
Re: ISDN How To
From:
"Michael Schlenstedt" ####@####.####
Date:
23 Jul 2004 07:19:49 -0000
Message-Id: <3974.212.95.122.226.1090567188.squirrel@www.schlenn.net>
Hi Bruno!
Nice work! I 've read the discussion on the TLDP-Mailinglist, too.
In my opinion we shouldn't merge both HOWTOs. Your HOWTO is more close to
an "analog modem"-setup-HOWTO than to ISDN4Linux/CAPI, though external
modems are definetly related to isdn. In fact, I would prefer to leave it
as a "Mini HOWTO", because it don't really fit into the "PPP-Howto" nor
into the ISDN-Howto.
If you (or of course the tldp-list ;-) ) think we nevertheless should
merge both howtos, I would prefer an extra chapter within the
"ISDN-HOWTO". But for that, your howto has to be distribution-independant
so the complete isdn-howto is.
Bye the way: Anybody who wants to help translating the ISDN-Howto into
english? ;-)
Bye,
Michael
Bruno Negrão sagte:
> Hi Michael,
>
> I just have made a step-by-step redhat linux dial-up configuration howto
> using an external ISDN modem.
> I'm discussing it on the TLDP's mailling list now.
>
> Maybe our howto's could be mixed. Please read it and tell me if it is
> related to your howto.
>
> Bellow is its source:
>
> Red Hat Linux + ISP Dial-up + ISDN External Modem Mini HOWTO
>
>
> 1) Introduction
>
>
> This document explains how to manually configure the required system files
> to make a ppp dial-up connection to an ISP (Internet Service Provider)
> using an external ISDN modem.
>
>
>
> Although we won't use any graphical user interface in this howto, the
> configuration we're going to do is the same that Red Hat's "Internet
> Connection Wizard" would create for you. This howto is especially useful
> when your system does not have the graphical environment installed.
>
>
>
> 2) Installation environment
>
>
> This installation was tested with the following system/hardware:
>
>
>
> OS: Red Hat Linux 9.0
>
> Kernel: version 2.4.20-31.9
>
> ISDN Modem: Leon Unik-22 UTA, external, connected via serial
> cable to the COM1 (/dev/ttyS0) PC's serial port.
>
> PPPD: version 2.4.1
>
>
>
> 3) Modem setup
>
>
> With an ISDN external modem no special setup is needed. The OS will treat
> your ISDN modem as if it was an ordinary external modem, no additional
> driver will be required. Just connect the modem to an available serial
> port in your machine and everything shall be all right.
>
>
>
> To verify the communication between your machine and your modem, use
> wvdialconf utility. It scans your serial ports searching for a modem and
> then it creates a small wvdial configuration file with the settings it has
> found.
>
>
>
> So, to make wvdialconf create a config file called /tmp/wvdial.conf.test,
> run the following:
>
>
>
> wvdialconf /tmp/wvdial.conf.test
>
>
>
> Its output is something like this:
>
>
>
> Scanning your serial ports for a modem.
>
>
>
> ttyS0<*1>: ATQ0 V1 E1 -- ATQ0 V1 E1
>
> ttyS0<*1>: failed with 2400 baud, next try: 4800 baud
>
> ttyS0<*1>: ATQ0 V1 E1 -- ATQ0 V1 E1
>
> ttyS0<*1>: failed with 4800 baud, next try: 9600 baud
>
> ttyS0<*1>: ATQ0 V1 E1 -- OK
>
> ttyS0<*1>: ATQ0 V1 E1 Z -- OK
>
> ttyS0<*1>: ATQ0 V1 E1 S0=0 -- OK
>
> ttyS0<*1>: ATQ0 V1 E1 S0=0 &C1 -- OK
>
> ttyS0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 -- OK
>
> ttyS0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- ERROR
>
> ttyS0<*1>: Modem Identifier: ATI -- IsdnTAplus
>
> ttyS0<*1>: Speed 19200: AT -- OK
>
> ttyS0<*1>: Speed 38400: AT -- OK
>
> ttyS0<*1>: Speed 57600: AT -- OK
>
> ttyS0<*1>: Speed 115200: AT -- OK
>
> ttyS0<*1>: Max speed is 115200; that should be safe.
>
> ttyS0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 -- OK
>
>
>
> Found a modem on /dev/ttyS0. <= Here: he found the modem in /dev/ttyS0
>
> /tmp/wvdial.conf.test<Warn>: Can't read config file /tmp/wvdial.conf.test:
> No such file or directory
>
> Modem configuration written to /tmp/wvdial.conf.test.
>
>
>
> We will discard the configuration file created by wvdialconf and create a
> new one for us ahead in this document. But before you remove this file,
> read its contents and try to figure out what they mean. A 'man
> wvdial.conf' can help you in this task.
>
>
>
> 4) Information provided by your ISP
>
>
> Your ISP must provide you the following information: A user and password
> to authenticate your connection and the telephone number your modem will
> dial to connect with them.
>
>
>
> In this document, we'll assume our ISP is called MYISP, the user is
> "myuser", its password is "mypasswd" and the ISP telephone number is
> "32254039".
>
>
>
> 5) DNS servers and the default route
>
>
> When the ppp connection is established, the ISP will dynamically assign
> your ppp interface with an IP address and the address(es) of one or more
> DNS servers. The ppp interface will be set as the default route.
>
>
>
> When the ppp connection is finished, your previous DNS configuration and
> default route are restored automatically.
>
>
>
> 6) Files to be edited
>
>
> We'll edit/create the following system files:
>
>
>
> /etc/sysconfig/network-scripts/ifcfg-ppp0
>
> ppp0 interface configuration file. Will be used by /sbin/ifup to activate
> the ppp0 interface and start the connection process.
>
>
>
> /etc/wvdial.conf
>
> Configuration options to wvdial (the program which dials to the ISP and
> calls pppd)
>
>
>
> /etc/ppp/pap-secrets
>
> User/password file for the pppd PAP authentication method [1].
>
>
>
> [1] A concise explanation about PAP and CHAP configuration files is
> available in the PPP-HOWTO at:
> http://www.tldp.org/HOWTO/PPP-HOWTO/x1005.html
>
>
>
> 6.1) Editing /etc/sysconfig/network-scripts/ifcfg-ppp0
>
>
> The /etc/sysconfig/network-scripts/ifcfp-ppp0 file will contain the
> following content:
>
>
>
> # Please read /usr/share/doc/initscripts-*/sysconfig.txt
>
> # for the documentation of these parameters.
>
> USERCTL=yes
>
> PEERDNS=yes
>
> TYPE=Modem
>
> DEVICE=ppp0
>
> BOOTPROTO=dialup
>
> ONBOOT=no
>
> NAME=MYISP
>
> CCP=off
>
> PC=off
>
> AC=off
>
> BSDCOMP=off
>
> VJ=off
>
> VJCCOMP=off
>
> LINESPEED=115200
>
> MODEMPORT=/dev/ttyS0
>
> IDLETIMEOUT=600
>
> DEMAND=no
>
> PROVIDER=MYISP
>
> DEFROUTE=yes
>
> PERSIST=no
>
> PAPNAME=myuser
>
> WVDIALSECT=MYISP
>
> MODEMNAME=Modem0
>
>
>
> 6.2) Editing /etc/wvdial.conf
>
>
> The /etc/wvdial.conf file will contain the following content:
>
>
>
> [Modem0]
>
> Modem = /dev/ttyS0
>
> Baud = 115200
>
> SetVolume = 0
>
> Dial Command = ATDT
>
> Init1 = ATZ
>
> FlowControl = CRTSCTS
>
> [Dialer MYISP]
>
> Username = myuser
>
> Password = mypasswd
>
> Phone = 32254039
>
> Stupid Mode = 1
>
> Init3 = ATc0=8c1=0 <= Attention: a special initialization string
>
> Inherits = Modem0
>
>
>
>
>
> The only tricky part of this file is the variable 'Init3' which is set
> here to 'Atc0=8c1=0'. This enables an ISDN connection using only one ISDN
> channel, usually of 64K bandwidth. If you have 2 ISDN channels to use, you
> can enable them both by setting the 'Init3' variable to 'Atc0=8c1=1'. This
> will provide you with a total bandwidth of 128K (64K + 64K of each
> channel).
>
>
>
> 6.3) Editing /etc/ppp/pap-secrets
>
>
> The /etc/ppp/pap-secrets file will contain the following content:
>
>
>
> # Secrets for authentication using PAP
>
> # client server secret IP addresses
>
> "myuser" * mypasswd
>
>
>
> Red Hat's "Internet Configuration Wizard" uses to create another file
> called /etc/ppp/chap-secrets with the same content of the file above, this
> is for the case when the ISP requires CHAP authentication. Since this is
> not common, and is not the case of my own ISP, I won't create this file.
>
>
>
> Now the entire configuration is done. Remember to substitute the strings
> MYISP, myuser, mypasswd and 32254039 in these 3 files to the real settings
> required by your ISP.
>
>
>
> 7) Establishing the ISDN connection
>
>
> To establish the ISDN connection, just run the command bellow:
>
>
>
> /sbin/ifup ppp0
>
>
>
> This single command will do all the stuff. To verify if your ppp0
> interface is really up, run the command 'ifconfig ppp0' and check it out.
>
>
>
> Also, you can run 'netstat -rn' to check your new default route attached
> to the ppp0 interface.
>
>
>
> Test the name resolution pinging a well known website: 'ping
> www.nytimes.com'.
>
>
>
> 8) Finishing the connection
>
>
> To finish this connection, run the command bellow:
>
>
>
> /sbin/ifdown ppp0
>
>
>
> Now, check with 'netstat -rn' if your previous default route (if there was
> one) is correctly in place again.
>
>
>
> Your file /etc/resolv.conf also should have configured the same DNS server
> it had before the ppp connection.
>
>
>
> 9) If there was a problem
>
>
> PPPD will log useful messages to /var/log/messages. Also, try running
> wvdial by yourself and dig for some clues.
>
>
>
>
>
> Regards,
>
> Bruno Negrão.
>
>
--
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