Настроили на Windows подключение к интернет, все работает. Делаю те же настройки в Linux - получаю "LCP: timeout sending Config-Requests".

pppoe.conf:
ETH='eth0'
USER='feb10ezwzx'
DEMAND=no
DNSTYPE=SERVER
PEERDNS=yes
DNS1=
DNS2=
DEFAULTROUTE=yes
CONNECT_TIMEOUT=30
CONNECT_POLL=2
ACNAME=
SERVICENAME=
PING="."
PIDFILE="/var/run/$CF_BASE-pppoe.pid"
SYNCHRONOUS=no
CLAMPMSS=1412
LCP_INTERVAL=20
LCP_FAILURE=3
PPPOE_TIMEOUT=80
FIREWALL=NONE
LINUX_PLUGIN=
PPPOE_EXTRA=""
PPPD_EXTRA=""

Логи подключения:
Mar 12 19:48:40 localhost pppd[7266]: pppd 2.4.4 started by root, uid 0
Mar 12 19:48:40 localhost pppd[7266]: using channel 1
Mar 12 19:48:40 localhost pppd[7266]: Using interface ppp0
Mar 12 19:48:40 localhost pppd[7266]: Connect: ppp0 <--> /dev/pts/4
Mar 12 19:48:41 localhost pppd[7266]: sent [LCP ConfReq id=0x1 <mru 1492> <magic 0x77cac368>]
Mar 12 19:48:44 localhost pppd[7266]: sent [LCP ConfReq id=0x1 <mru 1492> <magic 0x77cac368>]
Mar 12 19:48:47 localhost pppd[7266]: sent [LCP ConfReq id=0x1 <mru 1492> <magic 0x77cac368>]
Mar 12 19:48:50 localhost pppd[7266]: sent [LCP ConfReq id=0x1 <mru 1492> <magic 0x77cac368>]
Mar 12 19:48:53 localhost pppd[7266]: sent [LCP ConfReq id=0x1 <mru 1492> <magic 0x77cac368>]
Mar 12 19:48:56 localhost pppd[7266]: sent [LCP ConfReq id=0x1 <mru 1492> <magic 0x77cac368>]
Mar 12 19:48:59 localhost pppd[7266]: sent [LCP ConfReq id=0x1 <mru 1492> <magic 0x77cac368>]
Mar 12 19:49:02 localhost pppd[7266]: sent [LCP ConfReq id=0x1 <mru 1492> <magic 0x77cac368>]
Mar 12 19:49:05 localhost pppd[7266]: sent [LCP ConfReq id=0x1 <mru 1492> <magic 0x77cac368>]
Mar 12 19:49:08 localhost pppd[7266]: sent [LCP ConfReq id=0x1 <mru 1492> <magic 0x77cac368>]
Mar 12 19:49:11 localhost pppd[7266]: LCP: timeout sending Config-Requests
Mar 12 19:49:11 localhost pppd[7266]: Connection terminated.
Mar 12 19:49:11 localhost pppd[7266]: Modem hangup
Mar 12 19:49:11 localhost pppd[7266]: Waiting for 1 child processes...
Mar 12 19:49:11 localhost pppd[7266]:   script /usr/sbin/pppoe -p /var/run/-pppoe.pid.pppoe -I eth0 -T 80 -U  -m 1412   , pid 7267
Mar 12 19:49:15 localhost pppd[7266]: Script /usr/sbin/pppoe -p /var/run/-pppoe.pid.pppoe -I eth0 -T 80 -U  -m 1412    finished (pid 7267), status = 0x1
Mar 12 19:49:15 localhost pppd[7266]: Exit.
Mar 12 19:49:15 localhost pppoe[7267]: Timeout waiting for PADO packets

Смотрел на то, как сделали в винде- обычное подключение pppoe; на вкладке "Безопасность" стоит "Безопасный пароль". После подключения (опять же- на виндовой машине) видно, что стоит MSCHAPv2. Подумал, что нужно require-mschap-v2 написать в /etc/ppp/options . Не помогло.

P.S.
Как можно в теме убрать "Почта" ? Невнимательно смотрел, когда отправлял тему.