Thread: Bluetooth Dial Up Networking on Linux

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Hello Hackers;

I am just documenting this topic because I tend to forget it all the time.
On this same laptop I have banged my head everytime after a fresh linux installation.
The GUI tools for this given with any linux distro never worked for me. I always had to go the old Linux way.

So finally, I am documenting it here.
Might follow it if you need to do the same.



You would need bluez package and wvdial package. Bluez for bluetooth connectivity and wvdial for dialing to a network.

For example on a Gnome Ubuntu box:

# apt-get install bluez-utils bluez-gnome wvdial



Now you need to pair up your machine and your phone device. When done, we can proceed with binding.

First scan for devices

# hcitool scan

Would get result something like this

Scanning …
xx:xx:xx:xx:xx:xx Austin (xx:xx:xx:xx:xx:xx is your devices bluetooth ID)


Now just check if that device supports DUN or not

# sdptool search dun xx:xx:xx:xx:xx:xx

This should give output something like following

Inquiring ...
Searching for dun on xx:xx:xx:xx:xx:xx ...
Service Name: Dial-Up Networking
Service RecHandle: 0x10005
Service Class ID List:
"Dialup Networking" (0x1103)
"Generic Networking" (0x1201)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 1
Profile Descriptor List:
"Dialup Networking" (0x1103)
Version: 0x0100


I see that my device supports L2CAP protocol and on top of that RFCOMM is available. I see that the service may be accessed via channel 1.
This should be the thing with most of of devices today.


Now lets just bind them up:

# rfcomm bind <rfcomm interface> <Target BT addr> <channel>

In my case:

# rfcomm bind 0 xx:xx:xx:xx:xx:xx 1

Now check if it worked.

# rfcomm

If it does show a clean report like this, then it worked !

rfcomm0: xx:xx:xx:xx:xx:xx channel 1 clean

Now rfcomm config has to be changed accordingly.
The config normally is placed at /etc/bluetooth/rfcomm.conf

Just make it look like this:

# RFCOMM configuration file.

rfcomm0 {
bind yes;
device 00:xx:xx:xx:xx:xx:xx;
channel 1;
comment “My_BT_device“;
}

#End of config

Now restart the bluetooth service:

# /etc/init.d/bluetooth restart

Now you are done with your bluetooh stuff.

Going to Dial Up stuff:

You will have to check for specific settings for your service provider.
Here is the config file for Idea Internet:

#Start

[Dialer Defaults]
Modem = /dev/rfcomm0
Baud = 30720000
Dial Command = ATDT
Init1 = ATE1
Init2 = AT+CGDCONT=1,"IP","Internet","",0,0
FlowControl = CRTSCTS
Init3 = ATM0
Phone = *99***1#
Username = (empty)
Password = (empty)
Stupid Mode = 1

#End



Hope it helps you and saves me from banging head again !


--

Godwin Austin