本人现在部署的公司服务器，服务端的URL都变成外网+端口的模式了。实用nat123做动态域名的。
现在Web登陆域名+端口号可以正常上传和下载，安卓端也可以正常和下载，内网PC可以正常同步和上传。
现问题：外网win PC客户端可以正常上传下载，但无法同步，请问这是怎么回事？
日志内容：
[01/11/17 21:49:50] seaf-daemon.c(548): starting seafile client 6.0.1
[01/11/17 21:49:50] seaf-daemon.c(550): seafile source code version 471e3eeccfbf4f15a887784cc8750dd622f61e70
[01/11/17 21:49:50] …/common/mq-mgr.c(60): [mq client] mq cilent is started
[01/11/17 21:49:52] …/common/mq-mgr.c(106): [mq mgr] publish to heartbeat mq: seafile.heartbeat
[01/11/17 21:52:22] clone-mgr.c(819): Transition clone state for 663c1bba from [init] to [connect].
[01/11/17 21:52:22] http-tx-mgr.c(1113): Bad response code for GET http://.nat123.cc:37076/seafhttp/protocol-version: 404.
[01/11/17 21:52:23] clone-mgr.c(819): Transition clone state for 663c1bba from [connect] to [connect].
[01/11/17 21:52:27] clone-mgr.c(819): Transition clone state for 663c1bba from [connect] to [connect].
[01/11/17 21:52:30] http-tx-mgr.c(1113): Bad response code for GET http://.nat123.cc:37076/seafhttp/protocol-version: 404.
[01/11/17 21:52:30] clone-mgr.c(819): Transition clone state for 663c1bba from [connect] to [connect].
[01/11/17 21:52:32] clone-mgr.c(819): Transition clone state for 663c1bba from [connect] to [connect].
[01/11/17 21:52:33] http-tx-mgr.c(1113): Bad response code for GET http://*****.nat123.cc:37076/seafhttp/protocol-version: 404.
跪求大神，学霸及程序猿解决，在线等！急！