无法连接到pptpd VPN

我正在使用CentOS 7，在我的服务器上启用了firewalld，目前我无法连接到我的pptpd vpn

日志

Dec 26 23:34:39 pptpd[28944]: CTRL: Client 39.55.196.181 control connection started Dec 26 23:34:39 pptpd[28944]: CTRL: Starting call (launching pppd, opening GRE) Dec 26 23:34:39 pppd[28945]: Plugin /usr/lib64/pptpd/pptpd-logwtmp.so loaded. Dec 26 23:34:39 pppd[28945]: pppd 2.4.5 started by root, uid 0 Dec 26 23:34:39 pppd[28945]: Using interface ppp0 Dec 26 23:34:39 pppd[28945]: Connect: ppp0 <--> /dev/pts/5 Dec 26 23:35:09 pppd[28945]: LCP: timeout sending Config-Requests Dec 26 23:35:09 pppd[28945]: Connection terminated. Dec 26 23:35:09 pppd[28945]: Modem hangup Dec 26 23:35:09 pppd[28945]: Exit. Dec 26 23:35:09 pptpd[28944]: GRE: read(fd=6,buffer=7f6470314480,len=8196) from PTY failed: status = -1 error = Input/output error, usually caused by unexpected termination of pppd, check option syntax and pppd logs Dec 26 23:35:09 pptpd[28944]: CTRL: PTY read or GRE write failed (pty,gre)=(6,7) Dec 26 23:35:09 pptpd[28944]: CTRL: Client 39.55.196.181 control connection finished

Firewalld的1723 / tcp启用了以下端口

我的options.pptpd如下

 name pptpd refuse-pap refuse-chap refuse-mschap require-mschap-v2 ms-dns 8.8.8.8 ms-dns 8.8.4.4 proxyarp lock novj novjccomp nologfd

请任何人都可以让我知道我在哪里做错了，还有什么我应该在firewalld启用

谢谢

谢谢，但问题已经解决了，因为firewalld阻止了在pptp.conf中configuration的本地和remoteip

问题已通过以下命令firewall-cmd –add-source = xx.xx.xx.x / 24解决

谢谢