สั่ง tail -f /var/log/messages ครับ 

an 29 09:48:40 gatewaychoen pppd[12732]: pppd 2.4.3 started by root, uid 0
Jan 29 09:48:40 gatewaychoen pppd[12732]: Using interface ppp0
Jan 29 09:48:40 gatewaychoen pppd[12732]: Connect: ppp0 <--> /dev/pts/2
Jan 29 09:49:00 gatewaychoen pppoe[12610]: Timeout waiting for PADS packets
Jan 29 09:49:07 gatewaychoen sshd(pam_unix)[13146]: session opened for user root by (uid=0)
Jan 29 09:49:10 gatewaychoen pppoe[12696]: Timeout waiting for PADS packets
Jan 29 09:49:11 gatewaychoen pppd[12732]: LCP: timeout sending Config-Requests
Jan 29 09:49:11 gatewaychoen pppd[12732]: Connection terminated.
Jan 29 09:49:11 gatewaychoen pppd[12732]: Using interface ppp0
Jan 29 09:49:11 gatewaychoen pppd[12732]: Connect: ppp0 <--> /dev/pts/1
Jan 29 09:49:16 gatewaychoen pppd[12732]: tcflush failed: Bad file descriptor
Jan 29 09:49:16 gatewaychoen pppd[12732]: Exit.
Jan 29 09:49:16 gatewaychoen adsl-connect: ADSL connection lost; attempting re-connection.
Jan 29 09:49:21 gatewaychoen pppd[13239]: pppd 2.4.3 started by root, uid 0
Jan 29 09:49:21 gatewaychoen pppd[13239]: Using interface ppp0