ti posto il log precedente alla connessione:

SuSE Meta pppd (smpppd-ifcfg), Version 1.16 on linux.
Status is: disconnected
trying to connect to smpppd
connect to smpppd
Status is: disconnected
Interface is eth0.
Status is: connecting
pppd[0]: Plugin rp-pppoe.so loaded.
pppd[0]: RP-PPPoE plugin version 3.3 compiled against pppd 2.4.2
pppd[0]: Plugin passwordfd.so loaded.
pppd[0]: Using interface ppp0
Status is: connecting
pppd[0]: Connect: ppp0 <--> eth0
pppd[0]: Couldn't increase MTU to 1500
pppd[0]: Couldn't increase MRU to 1500
pppd[0]: PAP authentication succeeded
pppd[0]: peer from calling number 00:09:B6:89:64:4A authorized
pppd[0]: local IP address 82.48.134.60
pppd[0]: remote IP address 192.168.100.1
pppd[0]: primary DNS address 81.74.224.227
pppd[0]: secondary DNS address 151.99.125.1
pppd[0]: Script /etc/ppp/ip-up finished (pid 4977), status = 0x0
Status is: connected

quel couldn't increase MTU to 1500 e sotto, cosa voglion dire?

la connessione ha una velocità media di 40B/s rx e 40B/s tx, non è possibile...