l2tp.sh 客户端如果在同一个wifi下面多个设备连接会有问题

[Cphilo]

我这边本地测试有两个设备Android（小米6）和mac pro，连接到一个wifi，出口ip相同 我本地测试如下：

1. 每个设备独立连接都是可以的
2. android设备切换到移动网络，mac是连接的wifi是可以的
3. android设备在一个wifi下保持服务器连接，mac尝试连接会出现连接不上的情况
4. mac设备在一个wifi保持服务器连接，android设备会连不上去

我服务器环境是centos7，我通过观察日志 journalctl -f 发现这个应该是因为一个wifi出去的ip相同会有冲突

mac连接服务器端会报错如下： Feb 26 15:10:14 izj6cb393gayijp3r7ticfz pluto[2717]: "l2tp-psk"[21] 123.58.9.18 #26: ESP traffic information: in=0B out=94B Feb 26 15:10:14 izj6cb393gayijp3r7ticfz pluto[2717]: "l2tp-psk" #26: deleting state (STATE_MAIN_R3) Feb 26 15:10:14 izj6cb393gayijp3r7ticfz pluto[2717]: "l2tp-psk"[21] 123.58.9.18: deleting connection "l2tp-psk"[21] 123.58.9.18 instance with peer 123.58.9.18 {isakmp=#0/ipsec=#0} Feb 26 15:10:14 izj6cb393gayijp3r7ticfz pluto[2717]: packet from 123.58.9.18:4500: received and ignored empty informational notification payload Feb 26 15:10:25 izj6cb393gayijp3r7ticfz xl2tpd[2790]: xl2tpd[2790]: Maximum retries exceeded for tunnel 40776. Closing. Feb 26 15:10:25 izj6cb393gayijp3r7ticfz xl2tpd[2790]: xl2tpd[2790]: Connection 52 closed to 123.58.9.18, port 52402 (Timeout) Feb 26 15:10:56 izj6cb393gayijp3r7ticfz xl2tpd[2790]: xl2tpd[2790]: Unable to deliver closing message for tunnel 40776. Destroying anyway. Feb 26 15:12:38 izj6cb393gayijp3r7ticfz pluto[2717]: "l2tp-psk"[20] 123.58.9.18 #28: responding to Main Mode from unknown peer 123.58.9.18 Feb 26 15:12:38 izj6cb393gayijp3r7ticfz pluto[2717]: "l2tp-psk"[20] 123.58.9.18 #28: transition from state STATE_MAIN_R0 to state STATE_MAIN_R1 Feb 26 15:12:38 izj6cb393gayijp3r7ticfz pluto[2717]: "l2tp-psk"[20] 123.58.9.18 #28: STATE_MAIN_R1: sent MR1, expecting MI2 Feb 26 15:12:38 izj6cb393gayijp3r7ticfz pluto[2717]: packet from 123.58.9.18:201: phase 1 message is part of an unknown exchange