>> 242
syslogを調べました。
特に問題はなさそうに見えますが…。

Oct 9 09:50:50 pppd[2215]: pppd 2.3.11 started by root, uid 0
Oct 9 09:50:50 pppd[2215]: Using interface ppp0
Oct 9 09:50:50 pppd[2215]: Connect: ppp0 <--> /dev/pts/0
Oct 9 09:50:50 pppoed[2216]: pppoed 1.310.000 started
Oct 9 09:50:50 pppoed[2218]: Related PIDs: 2215 2216 2218
Oct 9 09:50:50 pppoed[2216]: Sending PADI.
Oct 9 09:50:50 pppoed[2218]: Connecting to AC, "アクセスポイント".
Oct 9 09:50:50 pppoed[2216]: Sending PADR.
Oct 9 09:50:50 pppoed[2218]: Connected SessionID, 57844.
Oct 9 09:50:51 pppoed[2216]: Operating in Async mode.
Oct 9 09:50:51 pppd[2215]: not replacing existing default route to tap0 [192.168.1.2]
Oct 9 09:50:51 pppd[2215]: Cannot determine ethernet address for proxy ARP
Oct 9 09:50:51 pppd[2215]: local IP address 210.1?6.1?3.43
Oct 9 09:50:51 pppd[2215]: remote IP address 202.2?9.53.2?4
Oct 9 09:54:01 kernel: VFS: Disk change detected on device fd(2,0)