Может кого-то рвет как меня, похоже проблема в том, что роутер неправильно получает метку времени (по старому) и после этого связь рвется:
Jan 1 04:00:04 kernel: klogd started: BusyBox v1.4.2 (2009-07-06 16:08:14 CST)
Jan 1 04:00:04 RT-N15: wanduckmain starts
Jan 1 00:00:04 RT-N15: watchdog starts
Jan 1 00:00:04 RT-N15: ntp starts
Jan 1 00:00:04 RT-N15: ots starts
Jan 1 00:00:05 pppd[43]: Using interface ppp0
Jan 1 00:00:05 pppd[43]: Connect: ppp0 <--> pptp (vpn.itnet33.ru)
Jan 1 00:00:07 pppd[43]: local IP address 109.201.97.238
Jan 1 00:00:07 pppd[43]: remote IP address 10.10.255.26
Jan 1 00:00:07 pppd[43]: primary DNS address 192.168.255.200
Jan 1 00:00:07 pppd[43]: secondary DNS address 192.168.255.3
Jan 1 00:00:07 RT-N15: ip-up starts
Jan 1 00:00:07 PPTP: connect to ISP
Nov 3 22:38:00 ntp client: time is synchronized to time.windows.com pool.ntp.org
Nov 3 22:40:02 pppd[43]: LCP terminated by peer
Nov 3 22:40:05 pppd[43]: Connection terminated.
Nov 3 22:40:05 pppd[43]: Connect time 23584240.0 minutes.
Nov 3 22:40:05 pppd[43]: Sent 8384 bytes, received 113528 bytes.
Nov 3 22:40:12 pppd[43]: Terminating on signal 15.
Nov 3 22:40:12 pppd[43]: Connect time 23584240.0 minutes.
Nov 3 22:40:12 pppd[43]: Sent 8384 bytes, received 113528 bytes.
Nov 3 22:40:12 pppd[43]: Exit.
Nov 3 22:40:12 WAN Connection: WAN was exceptionally disconnected.