[SOLVED] DSL problem

[g.]

Hi,

I have a strange problem with a DSL connection (Alice ADSL for the Italian readers).

Wiht WICD I can connect to the router without problem, there is a WPA key that is recognized. My ifconfig and iwconfig are copied below.

I then run

sudo pppoeconf

and insert the new password while accepting all the default options. The plog command seems to be fine:

gianluca@trinity:~$ plog
May 27 11:56:54 trinity pppd[17051]: Using interface ppp0
May 27 11:56:54 trinity pppd[17051]: Connect: ppp0 <--> wlan0
May 27 11:56:55 trinity pppd[17051]: PAP authentication succeeded
May 27 11:56:55 trinity pppd[17051]: peer from calling number 00:90:1A:A0:8E:57 authorized
May 27 11:56:55 trinity pppd[17051]: not replacing existing default route via 192.168.1.1
May 27 11:56:55 trinity pppd[17051]: Cannot determine ethernet address for proxy ARP
May 27 11:56:55 trinity pppd[17051]: local IP address 87.18.37.175
May 27 11:56:55 trinity pppd[17051]: remote IP address 192.168.100.1
May 27 11:56:55 trinity pppd[17051]: primary  DNS address 85.37.17.11
May 27 11:56:55 trinity pppd[17051]: secondary DNS address 85.38.28.69

however, I'm not connected to the internet. From firefox I can also access to the router configuration interface and verify that my connection on the router is working.

As additional info, with kubuntu 8.04 it worked perfectly.

Any idea?

Thanks in advance,
g.

gianluca@trinity:~$ ifconfig 
eth0   Link encap:Ethernet HWaddr 00:21:70:d7:63:a1 
     UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
     RX packets:0 errors:0 dropped:0 overruns:0 frame:0
     TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:1000            
     RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)       
     Memory:f6fe0000-f7000000              

lo    Link encap:Local Loopback 
     inet addr:127.0.0.1 Mask:255.0.0.0
     inet6 addr: ::1/128 Scope:Host   
     UP LOOPBACK RUNNING MTU:16436 Metric:1
     RX packets:190 errors:0 dropped:0 overruns:0 frame:0
     TX packets:190 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:0               
     RX bytes:16821 (16.8 KB) TX bytes:16821 (16.8 KB)  

pan0   Link encap:Ethernet HWaddr 76:22:d3:67:fc:45 
     inet6 addr: fe80::7422:d3ff:fe67:fc45/64 Scope:Link
     UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 
     RX packets:0 errors:0 dropped:0 overruns:0 frame:0 
     TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:0              
     RX bytes:0 (0.0 B) TX bytes:540 (540.0 B)     

wlan0   Link encap:Ethernet HWaddr 00:21:6a:2d:b4:c2 
     inet addr:192.168.1.18 Bcast:192.168.1.255 Mask:255.255.255.0
     inet6 addr: fe80::221:6aff:fe2d:b4c2/64 Scope:Link       
     UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1       
     RX packets:23626 errors:0 dropped:0 overruns:0 frame:0     
     TX packets:27355 errors:0 dropped:0 overruns:0 carrier:0    
     collisions:0 txqueuelen:1000                  
     RX bytes:15163761 (15.1 MB) TX bytes:7028756 (7.0 MB)     

wmaster0 Link encap:UNSPEC HWaddr 00-21-6A-2D-B4-C2-00-00-00-00-00-00-00-00-00-00 
     UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
     RX packets:0 errors:0 dropped:0 overruns:0 frame:0
     TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:1000
     RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

gianluca@trinity:~$ iwconfig
lo    no wireless extensions.

eth0   no wireless extensions.

wmaster0 no wireless extensions.

wlan0   IEEE 802.11abgn ESSID:"Alice-26382430"
     Mode:Managed Frequency:2.412 GHz Access Point: 00:1D:8B:41:75:2D
     Bit Rate=18 Mb/s  Tx-Power=15 dBm
     Retry min limit:7  RTS thr:off  Fragment thr=2352 B
     Power Management:off
     Link Quality=100/100 Signal level:-41 dBm Noise level=-87 dBm
     Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
     Tx excessive retries:0 Invalid misc:0  Missed beacon:0

pan0   no wireless extensions.

[flarson]

Re: DSL problem

It may be that you have not established a default route. That is the route that will be used to find any address that is not on your local network, which is just about everything. To find out run

route

It should show something like this
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.0.0 * 255.255.255.0 U 0 0 0 eth0
default 192.168.0.100 0.0.0.0 UG 0 0 0 eth0

pppd has an option of defaultroute which will establish this.

[g.]

Re: DSL problem

my

/etc/ppp/peers/dsl-provider

already have the defaultroute option uncommented.

Is is what you meant?

thanks,
g.

the command route gives:

Kernel IP routing table
Destination   Gateway     Genmask     Flags Metric Ref  Use Iface
192.168.1.0   *        255.255.255.0  U   0   0    0 eth0
default     192.168.1.1   0.0.0.0     UG  0   0    0 eth0

[flarson]

Re: DSL problem

I seem to be seeing discrepancies here. Let me see if I can explain them. Your route shows

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 eth0
default 192.168.1.1 0.0.0.0 UG 0 0 0 eth0

And plog showed

gianluca@trinity:~$ plog
May 27 11:56:54 trinity pppd[17051]: Using interface ppp0
May 27 11:56:54 trinity pppd[17051]: Connect: ppp0 <--> wlan0
May 27 11:56:55 trinity pppd[17051]: PAP authentication succeeded
May 27 11:56:55 trinity pppd[17051]: peer from calling number 00:90:1A:A0:8E:57 authorized
May 27 11:56:55 trinity pppd[17051]: not replacing existing default route via 192.168.1.1
May 27 11:56:55 trinity pppd[17051]: Cannot determine ethernet address for proxy ARP
May 27 11:56:55 trinity pppd[17051]: local IP address 87.18.37.175
May 27 11:56:55 trinity pppd[17051]: remote IP address 192.168.100.1
May 27 11:56:55 trinity pppd[17051]: primary DNS address 85.37.17.11
May 27 11:56:55 trinity pppd[17051]: secondary DNS address 85.38.28.69

and ifconfig shows

wlan0 Link encap:Ethernet HWaddr 00:21:6a:2d:b4:c2
inet addr:192.168.1.18 Bcast:192.168.1.255 Mask:255.255.255.0

So your computer has an address in 192.168.1., your default route is 192.168.1.1, which agrees, but then your plog shows "remote IP address 192.168.100.1" which does not agree with the 192.168.1. addresses, so they can not see each other.

route is saying nothing about wlan0. eth0, which is in your routing table, has no ip address in ifconfig so it is not up.

Also plog is refering to "local IP address 87.18.37.175" which is a valid internet address and should ba associated with your connection to the outside world, where 192.168.x.x are internal only and must be in your local network.

It looks like somehow your local and remote ip addresses are reversed and you have a disagreement about the internal network addresses.

I hope that makes some sense.

So, what to do about it? Since you are using wicd your /etc/network/interfaces should contain only
auto lo eth0
iface lo inet loopback
Anything else should be commented like
#auto eth0
#iface eth0 inet dhcp

Is your DSL modem acting as your wireless access point also? If so it should be providing addresses that agree with its address but you have the .100. vz .1. error so I am thinking you have another wifi router and the 2 do not agree. I think it might be best to simplify by using the ethernet to get it working and then bring in the wifi.

[g.]

[SOLVED] Re: DSL problem

I solved the problem, it was related to the default route as you suggested.

In few words I just had to run

sudo route del default

and

sudo route add default gw 0.0.0.0

where 0.0.0.0 is the local IP address as given by the plog command.

so, it seems that from the version 8.10 to the version 9.04 there is not an automatic update of the route?

tanks again. best
g.