freeBSD pptp连接到RouterOS服务器 问题

上尉

各位求教freeBSD 中pptp连接routeros vpn服务器，用windows连接没有问题，客户端改用BSD就无法连接到RouterOS服务器，请问是为什么。如果有人连接过请把步骤告诉我。谢谢
ppp.log中的信息如下
Sep  6 13:15:49 test ppp[91641]: Phase: Using interface: tun0
Sep  6 13:15:49 test ppp[91641]: Phase: deflink: Created in closed state
Sep  6 13:15:49 test ppp[91641]: Warning: The alias command is deprecated
Sep  6 13:15:49 test ppp[91641]: Phase: PPP Started (direct mode).
Sep  6 13:15:49 test ppp[91641]: Phase: bundle: Establish
Sep  6 13:15:49 test ppp[91641]: Phase: deflink: closed -> opening
Sep  6 13:15:49 test ppp[91641]: Phase: deflink: Connected!
Sep  6 13:15:49 test ppp[91641]: Phase: deflink: opening -> carrier
Sep  6 13:15:50 test ppp[91641]: Phase: Signal 15, terminate.
Sep  6 13:15:50 test ppp[91641]: Phase: deflink: Disconnected!
Sep  6 13:15:50 test ppp[91641]: Phase: deflink: Connect time: 1 secs: 0 octets in, 0 octets out
Sep  6 13:15:50 test ppp[91641]: Phase: deflink: 0 packets in, 0 packets out
Sep  6 13:15:50 test ppp[91641]: Phase:  total 0 bytes/sec, peak 0 bytes/sec on Wed Sep  6 13:15:49 2006
Sep  6 13:15:50 test ppp[91641]: Phase: deflink: carrier -> closed
Sep  6 13:15:50 test ppp[91641]: Phase: bundle: Dead
Sep  6 13:15:50 test ppp[91641]: Phase: PPP Terminated (normal).