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Hi, I'm new to Linux. Have Mandrake10.1 installed in my computer, I have a Sagem F@ST 800 USB Modem, this is working fine in mandrake, can't setup my ISP don't ...
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  1. #1
    Just Joined!
    Join Date
    Dec 2004
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    3

    How do I setup my ISP


    Hi, I'm new to Linux. Have Mandrake10.1 installed in my computer, I have a Sagem F@ST 800 USB Modem, this is working fine in mandrake, can't setup my ISP don't know how to. My ISP is Plusnet they submit this info:

    Configuring Linux for Dial on Demand


    Configuring your Linux server or workstation to dial the internet on demand is accomplished as follows.
    Modem compatibility
    Many websites are available to help determine if your modem is compatible with Linux, the most common being

    Modem type and compatibility with Linux
    Modem setup strings
    Simple firewall package

    Packages
    There are two essential packages, these being pppd [to get online using ppp] and ipchains [to 'firewall' your connection]. Two of the many optional packages are crond [to schedule when your connection is available] and minicom [to test your modem]

    Preparation
    You will need to be the 'root' user to follow these instructions. Please note - these instructions apply in general to using a 'real' modem, that is a Modem which does not require a software driver to run such as many winmodems.

    1 . Connecting the Modem
    The communications ports in Linux are named differently than in windows. The correct communications port to use are the devices listed in the /dev directory which begin ttyS followed. Examples are /dev/ttyS0, /dev/ttyS1, /dev/ttyS2 and /dev/ttyS3 for Com ports 1 to 4 respectively. In this example the modem is connected to Com2. You may also wish to ensure that your com port is operating at an appropriate speed. You can use the setserial command to inspect and amend the settings for the com port.

    [root@ashaman]# setserial -g /dev/ttyS1
    /dev/ttyS1, UART: 16550A, Port: 0x03f8, IRQ: 4

    Most distributions provide a rc.serial or serial script in the init directories. These set the com port flags at boot time for each com port. If you cannot locate these or have reasons for setting com speeds differently then you might create the following shell script, not forgetting to chmod +x the script before running it.

    setcom1.sh
    #!/bin/bash
    setserial /dev/ttyS0 uart 16550A port 0x03f8 irq 4 baud_base 115200 spd_vhi skip_test

    If you ran the above your com port may look like.

    [root@ashaman bin]# setserial -g /dev/ttyS0
    /dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4, Flags: spd_vhi

    2. Ensuring your requests for the internet are responded to
    [root@ashaman nik]# cat /proc/sys/net/ipv4/ip_forward 1

    If you see 0 here then you can set this value tru by typing.

    [root@ashaman nik]echo 1 >/proc/sys/net/ipv4/ip_forward

    You may wish to ensure that this value is set every time that the ppp connection is requested. Later in this guide an example is given as to how to place this in a shell script before starting pppd.

    3. Ensuring that your machine is secure
    To provide a firewall and protect your machine from unwanted access you should implement an ipchains rule set to control access and stop unwanted visitors. Simply click here, unpack the files and place the file firewall.sh in /usr/sbin ensuring the file firewall.sh is executable. You can enable the firewall by specifying the
    name of the external ppp device, usually zero and in the internal networking device.

    [root@ashaman]firewall.sh ppp0 eth0

    Note eth0 is necessary where you are using Linux as a gateway between the internet and a local area network, otherwise the following command will protect your machine.

    [root@ashaman]firewall.sh ppp0

    4. Resolving names on the internet
    You will need to let Linux know how and where to locate internet sites. This guide assumes that you are not using Domain Name Server local to your box. You will need to amend at least two files. By default your Linux distribution will have configured the other host files correctly.

    /etc/host.conf
    order hosts,bind
    multi on
    /etc/resolv.conf
    nameserver 212.159.13.49
    nameserver 212.159.13.50
    /etc/hosts.deny
    ALL:ALL

    5. Configuring PPP
    Distributions of Linux vary, but in general the configuration files for PPP will be stored in /etc/ppp . In the example a simple ppp options file will be created along with a chat script (which will dial the Modem). PPP connections will vary depending on the service you are dialling. You will need to amend the chat script accordingly and this is highlighted below. PPP Connections come in two parts: the chat script and the pppd options.

    5.1 Chat Script

    To dialup on a Connect account.

    /etc/ppp/connect.sh
    #!/bin/sh
    exec chat -s -v \
    SAY "Set modem responses" \
    TIMEOUT 3 \
    ABORT '\nBUSY\r' \
    ABORT '\nNO ANSWER\r' \
    ABORT '\nRINGING\r\n\r\nRINGING\r' \
    ABORT '\n% Authentication failed\r' \
    '' \rAT \
    'OK-+++\c-OK' ATH0 \
    SAY "Send number " \
    TIMEOUT 5 \
    SAY "Set modem Reponses" \
    OK "ATX4V1Q0S7=70" \
    OK "ATM0L0DT0808,9933,0xx" \
    TIMEOUT 45 \
    SAY "Wait for connect" \
    CONNECT '\c'


    Note: replace xx with the appropriate number for the Connect service you are using.

    To dialup via 0845

    /etc/ppp/dial0845.sh
    #!/bin/sh
    exec chat -s -v \
    SAY "Set modem Reponses" \
    TIMEOUT 3 \
    ABORT '\nBUSY\r' \
    ABORT '\nNO ANSWER\r' \
    ABORT '\nBLACKLISTED\r' \
    ABORT '\nRINGING\r\n\r\nRINGING\r' \
    '' \rAT \
    'OK-+++\c-OK' ATH0 \
    SAY "Send number " \
    TIMEOUT 65 \
    SAY "Set modem Reponses" \
    OK "AT&F" \
    OK "ATM0L0DT0845xxxxxx" \
    SAY "Wait for connect" \
    CONNECT '' \
    Login:--Login: [your username here] \
    Password: [you password here]


    NB: replace xxxxxx with the appropriate number for your account type.

    If you want to configure your modem more accurately then ensure that you surround the AT command with quotes. More details are available here. Remember to set the scripts as executable e.g. chmod +x dial0845sh

    5.2 PPP Options
    Options file for dialup on a Connect account.

    /etc/ppp/options
    name [your username here]
    hide-password
    ipcp-accept-remote
    ipcp-accept-local
    connect-delay 2
    passive
    noauth
    defaultroute
    require-chap
    asyncmap 0
    demand
    maxfail 0
    holdoff 1
    connect /etc/ppp/connect.sh
    lock
    crtscts
    idle 1800
    modem
    netmask 255.255.255.0

    Note you need to use either connect.sh or dial0845.sh as the connection script. For more information about these options try man pppd.

    5.3 Other Script options
    /etc/ppp/chap-secret
    [your username here] * [your password here]
    /etc/ppp/ip-up.local
    #!/bin/bash
    firewall.sh ppp0

    Remember to use firewall.sh ppp0 eth0 for a local area network.

    5.4 To Launch ppp
    [root@ashaman]/usr/sbin/pppd /dev/ttyS0 115200 noauth

    From here ppp should become enabled once a request has been made to access the internet. Once PPP is running it will automatically start the chat script to dial the modem and access the internet . If you wish to stop the pppd process you will need to locate its process ID and stop it. This can be done with the following command

    [root@ashaman] ps -ax | grep pppd
    29064 ttyS1 S 0:00 pppd

    The value 29064 is the process id of the running pppd application. You can also find this value by typing the following command

    [root@ashaman] cat /var/run/ppp0.pid 29064

    In either situation you can stop the process by issuing the kill command

    [root@ashaman] kill 29064

    Or you could type

    [root@ashaman] kill `cat /var/run/ppp0.pid`

    6. Making life simpler
    Some example scripts to automate stopping and starting ppp
    /root/bin/connect.sh
    #!/bin/bash
    internetdown
    ifconfig ppp0 down
    echo 1 >/proc/sys/net/ipv4/ip_forward
    pppd /dev/ttyS1 115200 noauth
    echo "done." /root/bin/internetdown.sh
    #!/bin/bash
    for pppdevice in /var/run/ppp?.pid
    do
    if [ -f $pppdevice ]
    then
    kill `cat $pppdevice`
    fi
    done

    7. Automating the pppd process
    You could add an entry to the cron deamon process that would call these scripts. In this example the pppd process is started at 6am each day and stopped at 11pm each day.

    [root@ashaman] crontab -e

    0 6 * * mon,tue,wed,thu,fri,sat,sun /root/bin/surf.sh
    0 23 * * mon,tue,wed,thu,fri,sat,sun /root/bin/internet-down

    I would like someone to HELP me to do this Step - By - Step so I don't make any mistakes in setting up my ISP. THANK YOU.

  2. #2
    Just Joined!
    Join Date
    Dec 2004
    Posts
    10

    isp help

    I a semi-nuub....if you are using KDE you are 1/2 there ..use the KPPP tool......just fillin the blank's for starter's....you isp generously gave you the address's needed.....nameserver 212.159.13.49
    nameserver 212.159.13.50 ....netmask 255.255.255.0 ...are thing's you will need.....easer for you to just take time and just click around ...just make little notes what you try and suddenly it will jell..or your mind will go to jelly...

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