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升级VMware esxi 5.5后RouterOS虚拟机PPTP停留在验证用户密码界面

最近升级了VMware esxi 5.5后, 早上起来发现有人反应PPTP服务器没法连接VPN, 自己用黑苹果测试了一下, 发现服务器断开链接. 又试了一下Win7, 发现长久停留在验证用户名和密码的界面.
之前都好好的, 没有修改过PPTP服务器配置, 试了一下重新重启加载之前保存的配置, 再次拨号结果依然一样.
打开系统日志发现如下:

上网Google了一下, 找到了原因. 原来是虚拟机的E1000网卡的祸. 把E1000网卡删除, 然后添加Flexible类型网卡, 重新启动就解决了这个Bug. 如图.

 
下面是参考资料:
http://forum.mikrotik.com/viewtopic.php?f=15&t=78280
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2061834

Point-to-Point Tunneling Protocol (PPTP) connections may not work on ESXi 5.5(2061834)

Symptoms

  • After upgrading to ESXi 5.5, the virtual machine providing Virtual Private Network (VPN)/Router/Firewall services is unable to connect to via Point-to-Point Tunneling Protocol.
  • The virtual machine providing VPN/Router/Firewall is configured to use an E1000 vNIC adapter.
  • Clients are unable to establish a PPTP connection to the virtual machine.
  • Attempts to connect to the virtual machine with:Error 628
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