1. Requirements
  2. Setting up pppd
  3. Advanced Configuration
  4. See Also


You will need a mobile phone with GPRS and Bluetooth, a Bluetooth device and a NetBSD system that supports Bluetooth (4.0 and above).

In this example, we are using a Nokia 6230i phone, a Broadcom USB dongle and NetBSD 4.9.11.

Setting up pppd

We need to create some pppd options and chat scripts, first create the directories

  # mkdir -p /etc/ppp/peers

Create a /etc/ppp/options file containing

  # default options file for [pppd(8)](//

and a /etc/ppp/chat.gsm file containing

  #  Chat script to dial out with GSM phone
  ABORT     "BUSY"

  TIMEOUT   10
  ""        AT
  OK        AT+CGDCONT=1,"IP","\U"

  TIMEOUT   60
  OK        ATDT\T
  CONNECT   \c

Create a /etc/ppp/peers/gprs file containing

  # pppd(8) options file for GPRS
  # The Access Point Name (APN) used by your GSM Operator may need
  # to be different from the "internet" used below.
  pty "rfcomm_sppd -a phone -d ubt0 -s DUN -m encrypt"
  connect "/usr/sbin/chat -V -f /etc/ppp/chat.gsm -U internet -T *99#"

Configuring Bluetooth

First, activate Bluetooth on your phone, on the Nokia 6230i as follows

  Menu > Settings > Connectivity > Bluetooth > Bluetooth settings > My phone's name
  Choose a name for your device, for this example I will use "My Nokia"

  Menu > Settings > Connectivity > Bluetooth > Bluetooth settings > My phone's visbility
  Choose "Shown to all"

  Menu > Settings > Connectivity > Bluetooth > Bluetooth >
  Choose "Bluetooth on"

Plug your Bluetooth dongle into your computer and you should see something like the following on the console

  ubt0 at uhub0 port 1 configuration 1 interface 0
  ubt0: Broadcom BCM92035DGROM, rev 1.10/0.04, addr 2

Now, we need to establish a Bluetooth connection between your phone and computer. Enable the Bluetooth dongle

  # /etc/rc.d/bluetooth start
  Configuring Bluetooth controllers: ubt0.
  starting Bluetooth Link Key/PIN Code manager
  starting Bluetooth Service Discovery server

and perform an inquiry to discover the Bluetooth device address of your phone

  # btconfig ubt0 inquiry
  Device Discovery from device ubt0 ..... 1 response
   1: bdaddr 00:22:b3:22:3e:32
    : name "My Nokia"

Add an alias of the bdaddr (yours will be different) to /etc/bluetooth/hosts

  # echo "00:22:b3:22:3e:32 phone" >> /etc/bluetooth/hosts

Next set up a PIN in order to pair the phone with your Bluetooth dongle

  # btpin -a phone -r -l 6
  PIN: 928434

and attempt to open a manual RFCOMM connection to the Dial Up Networking (DUN) service on the phone (press ^C to close the connection)

  # rfcomm_sppd -a phone -s DUN
  Starting on stdio...
  Nokia 6230i


Your phone should prompt you for accepting the connection from your computer, accept it and enter the PIN that btpin generated to complete the pairing process.

Now we can start pppd

  # pppd call gprs
  Serial connection established.
  Connect:  ppp0 <--> /dev/ttyp9
  local     IP address
  Remote    IP address
  Primary   DNS address IP
  Secondary DNS address IP

You are now online. To terminate your pppd session just press Control + C, or send a SIGHUP to the pppd process.

Advanced Configuration

You may find that some phones require authentication when connecting to PPP, this will be a username/password provided by your GSM Operator.

Create a /etc/ppp/chap-secrets file, owned by root and unreadable by anybody else (mode 0600) containing

  # CHAP/PAP secrets file
  "user" * "pass"

and add the following line to the /etc/ppp/peers/gprs file

   user "user"

To automatically configure the DNS server when the PPP link is brought up, create a /etc/ppp/ip-up file containing

  # ip-up <interface> <tty> <speed> <local-ip> <remote-ip> <ipparam>
  #            $1      $2      $3       $4         $5          $6

  if [ -f /etc/ppp/resolv.conf ]; then
      rm -f /etc/resolv.conf
      mv /etc/ppp/resolv.conf /etc/resolv.conf

See Also

The Bluetooth section in the NetBSD Guide contains more general Bluetooth configuration, and details of all PPP options can be found in the pppd(8) manpage.