香港区做一键L2tpl连接不上，安全组已经开放500，4500，1701三个端口

xl2tpd[14628]: Not looking for kernel SAref support.
xl2tpd[14628]: Using l2tp kernel support.
xl2tpd[14628]: xl2tpd version xl2tpd-1.3.8 started on izj6civyhbipdwd0vmn636z PID:14628
xl2tpd[14628]: Written by Mark Spencer, Copyright (C) 1998, Adtran, Inc.
xl2tpd[14628]: Forked by Scott Balmos and David Stipp, (C) 2001
xl2tpd[14628]: Inherited by Jeff McAdams, (C) 2002
xl2tpd[14628]: Forked again by Xelerance (www.xelerance.com) (C) 2006-2016
xl2tpd[14628]: Listening on IP address 0.0.0.0, port 1701
xl2tpd[14628]: control_finish: Peer requested tunnel 11 twice, ignoring second one.
xl2tpd[14628]: control_finish: Peer requested tunnel 11 twice, ignoring second one.
xl2tpd[14628]: control_finish: Peer requested tunnel 11 twice, ignoring second one.
xl2tpd[14628]: control_finish: Peer requested tunnel 11 twice, ignoring second one.
xl2tpd[14628]: control_finish: Peer requested tunnel 11 twice, ignoring second one.
xl2tpd[14628]: Maximum retries exceeded for tunnel 59459.  Closing.
xl2tpd[14628]: Connection 11 closed to 221.205.227.37, port 1701 (Timeout)
xl2tpd[14628]: Unable to deliver closing message for tunnel 59459. Destroying anyway.
用一键脚本l2tp.sh装的，ipsec verify全OK，在服务器端看到LOG如上，说明已经有请求进来了，但是没有办法进行下去，谁能给个思路？不胜感激。