Setting up bluetooth on your Linux Ipaq

Desktop side

> apt-get hotplug
> apt-get ipmasq

Edit /etc/network/interfaces:

iface bnep0 inet static
        address 192.168.100.1
        netmask 255.255.255.0

mapping hotplug
        script /bin/grep
        map bnep0

Edit /etc/default/bluez-pan:

PAND_ENABLED=1

PAND_OPTIONS="--listen --role GN"

Edit /etc/network/options:

ip_forward=yes
spoofprotect=yes
syncookies=no

Check your setup:

> hciconfig
hci0:   Type: USB
        BD Address: 00:10:60:29:1A:4B ACL MTU: 192:8  SCO MTU: 64:8
        UP RUNNING PSCAN ISCAN
        RX bytes:1123 acl:22 sco:0 events:72 errors:0
        TX bytes:1168 acl:22 sco:0 commands:29 errors:0

If this doesn't work, try to unload the bluetooth module and reinsert your bluetooth usb adapter.

Opie side

Install task-bluez, opie-bluettothapplet and opie-bluetoothmanager on your ipaq. Hit enable bluetooth in the applet, then start the manager. Scan for devices. Now you got your desktop pc as bluetooth device. When you look at the services, you'll see Network Access Point. Long click this item and choose connect + conf (or configure manually like I did and just hit connect).

Manual Configuration: edit /etc/network/interfaces

iface bnep0 inet static
        address 192.168.100.2
        netmask 255.255.255.0
        network 192.168.100.0
        gateway 192.168.100.1

If internet access doesn't work, try to restart ipmasq on your desktop computer.