Ubuntu and Mobile 3G help!

Desmo · 15-04-2008, 17:17

I'm trying to get the lappy connected via 3G from my mobile. I've installed Blueman 1.9 (had to use an older version as the newer one wouldn't install) and also installed kppp.

Now, I can get my mobile to connect to the laptop, "dial up" and it completes the connection. The mobile shows the 3G symbol and I seem to get an IP address. But that's it, no data flows in either direction apart from the first few packets of data which I'm assuming is just the connection data.

So, I'm at a loss as to what to check next. It seems it should be working but just doesn't. Using a Nokia N73 on O2.

Burble · 15-04-2008, 18:51

What does the output of 'route -n' show?

Desmo · 15-04-2008, 20:55

Code:

Kernel IP routeing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.6.6.6        0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
10.0.0.0        0.0.0.0         255.255.255.0   U     0      0        0 eth1
10.0.0.0        0.0.0.0         255.255.255.0   U     0      0        0 eth0
0.0.0.0         10.0.0.1        0.0.0.0         UG    100    0        0 eth1

Mark · 15-04-2008, 20:59

OK - that figures. Looks like some gentle massaging of routing tables is in order.

I think I understand roughly what needs doing but I'd best leave it to someone who knows networking configuration better than me.

Burble · 15-04-2008, 21:14

The important line from the routing table you posted is the bottom line, it basically says that to get to anywhere outside of your local network go via 10.0.0.1 via eth1 which I suspect is your wireless card.

I think something like 'route add 0.0.0.0 0.0.0.0 10.6.6.6 ppp0' should do the trick. However, that would only work for your current ppp session.

It should affect your ethernet/wireless connectivity after the ppp session as ended as the ppp interface should go down and vanish from the routing table but if it doesn't try 'route delete 0.0.0.0 0.0.0.0 10.6.6.6 ppp0'

Desmo · 15-04-2008, 21:17

OK, will give it a whirl

Desmo · 15-04-2008, 21:26

It doesn't seem to like that route add command. I did look through the settings in kppp though and I can manually add the gateway address. I popped in 10.0.0.6 (assuming it's correct) but it still didn't work.

Burble · 15-04-2008, 21:31

I did wonder if I had the syntax right or not, I'm a bit rusty. Looking back at the routing table, I think you might want to use 10.6.6.6 as the IP address although that doesn't seem right.

It's entirely plausible that a Mobile network will use an RFC1918 (private) address rather than an internet routable one, but 10.6.6.6 seems a bit iffy. You can double check the IP address by doing 'ifconfig ppp0'

Desmo · 15-04-2008, 21:37

I did an ifconfig earlier and got this...

Code:

ppp0      Link encap:Point-to-Point Protocol  
          inet addr:10.115.79.205  P-t-P:10.6.6.6  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:4 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3 
          RX bytes:64 (64.0 b)  TX bytes:97 (97.0 b)

Burble · 15-04-2008, 21:40

Using kppp try to add a default route of 10.115.79.205.

15-04-2008, 17:17	#1
Desmo The Last Airbender Join Date: Jun 2006 Location: Pigmopad Posts: 11,915	Ubuntu and Mobile 3G help! I'm trying to get the lappy connected via 3G from my mobile. I've installed Blueman 1.9 (had to use an older version as the newer one wouldn't install) and also installed kppp. Now, I can get my mobile to connect to the laptop, "dial up" and it completes the connection. The mobile shows the 3G symbol and I seem to get an IP address. But that's it, no data flows in either direction apart from the first few packets of data which I'm assuming is just the connection data. So, I'm at a loss as to what to check next. It seems it should be working but just doesn't. Using a Nokia N73 on O2. __________________

15-04-2008, 21:17	#6
Desmo The Last Airbender Join Date: Jun 2006 Location: Pigmopad Posts: 11,915	OK, will give it a whirl __________________

15-04-2008, 21:26	#7
Desmo The Last Airbender Join Date: Jun 2006 Location: Pigmopad Posts: 11,915	It doesn't seem to like that route add command. I did look through the settings in kppp though and I can manually add the gateway address. I popped in 10.0.0.6 (assuming it's correct) but it still didn't work. __________________

15-04-2008, 18:51	#2
Burble Rocket Fuel Join Date: Jul 2006 Posts: 7,826	What does the output of 'route -n' show?

15-04-2008, 20:59	#4
Mark Screaming Orgasm Join Date: Jul 2006 Location: Newbury Posts: 15,194	OK - that figures. Looks like some gentle massaging of routing tables is in order. I think I understand roughly what needs doing but I'd best leave it to someone who knows networking configuration better than me.

15-04-2008, 21:14	#5
Burble Rocket Fuel Join Date: Jul 2006 Posts: 7,826	The important line from the routing table you posted is the bottom line, it basically says that to get to anywhere outside of your local network go via 10.0.0.1 via eth1 which I suspect is your wireless card. I think something like 'route add 0.0.0.0 0.0.0.0 10.6.6.6 ppp0' should do the trick. However, that would only work for your current ppp session. It should affect your ethernet/wireless connectivity after the ppp session as ended as the ppp interface should go down and vanish from the routing table but if it doesn't try 'route delete 0.0.0.0 0.0.0.0 10.6.6.6 ppp0'

15-04-2008, 21:31	#8
Burble Rocket Fuel Join Date: Jul 2006 Posts: 7,826	I did wonder if I had the syntax right or not, I'm a bit rusty. Looking back at the routing table, I think you might want to use 10.6.6.6 as the IP address although that doesn't seem right. It's entirely plausible that a Mobile network will use an RFC1918 (private) address rather than an internet routable one, but 10.6.6.6 seems a bit iffy. You can double check the IP address by doing 'ifconfig ppp0'

15-04-2008, 21:40	#10
Burble Rocket Fuel Join Date: Jul 2006 Posts: 7,826	Using kppp try to add a default route of 10.115.79.205.