На Kubuntu 8.04 не могу настроить интернет.
sudo pppoeconf - не помогает.
Вот что выдает на plog и ifconfig .
katashi-haru@katashi-haru-desktop:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:17:31:36:ae:57
inet6 addr: fe80::217:31ff:fe36:ae57/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1107 errors:0 dropped:0 overruns:0 frame:0
TX packets:242 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:228458 (223.1 KB) TX bytes:16784 (16.3 KB)
Interrupt:21 Base address:0x8000
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:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
ppp0 Link encap:Point-to-Point Protocol
inet addr:192.168.1.91 P-t-P:192.168.1.254 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1
RX packets:59 errors:0 dropped:0 overruns:0 frame:0
TX packets:59 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:15114 (14.7 KB) TX bytes:3298 (3.2 KB)
katashi-haru@katashi-haru-desktop:~$ plog
Apr 8 16:38:41 katashi-haru-desktop pppd[6340]: CHAP authentication failed: More then allow login (1/1)^J
Apr 8 16:38:41 katashi-haru-desktop pppd[6340]: CHAP authentication failed
Apr 8 16:38:41 katashi-haru-desktop pppd[6493]: Connection terminated.
Apr 8 16:38:41 katashi-haru-desktop pppd[6493]: Modem hangup
Apr 8 16:38:47 katashi-haru-desktop pppd[6340]: Connection terminated.
Apr 8 16:38:47 katashi-haru-desktop pppd[6340]: Modem hangup
Apr 8 16:38:54 katashi-haru-desktop pppd[5960]: write: Bad file descriptor (9)
Apr 8 16:38:54 katashi-haru-desktop pppd[5960]: PPP session is 102
Apr 8 16:38:54 katashi-haru-desktop pppd[5960]: Using interface ppp1
Apr 8 16:38:54 katashi-haru-desktop pppd[5960]: Connect: ppp1 <--> eth0
katashi-haru@katashi-haru-desktop:~$
Вот эта же тема если еще что-то понадобится:
http://linuxforum.ru/index.php?showtopic=64988&st=0&gopid=627647&#entry627647 
Не проходите мимо граждане
