更改系统时间导致OpenVPN删除TAP0的地址
我已连接到OpenVPN服务器。（使用-proto tcp，-dev tap，...）在Linux客户端上。 连接效果很好，除非我更改系统时间（例如system（“/bin/date -s xxx”），然后 send> send（notings）立即到服务器，Tap0节点有时将被删除，NetLink Monitor将接收RTM_DELADDR，IF_NAME为TAP0，这意味着已删除其iPaddress。
我尝试过的内容：
- 连接后，将SYS时间更改为终端（
/bin/date -s xxx），然后发送（notings）到服务器。 连接后无法复制 - ，如下呼叫无法复制。
system("/bin/date -s xxx");
sleep(1);//sleep 1s
send(anything);
- 连接后，像下面的呼叫一样，有时可以再现。
system("/bin/date -s xxx");
//sleep(1);//sleep 1s
send(anything);
- 尝试使用不同版本的OpenVPN，获得相同的结果。
我们看不到有关在本地日志文件中删除此节点的任何信息。 所以我的问题是：
- OpenVPN服务器是否删除了该节点或其他任何节点（例如TCP Proto或驱动程序）？
- 为什么删除它？
感谢您的建议。
I have connected to an openvpn server.(with --proto tcp, --dev tap, ...) on a linux client.
Connection works well unless I change the system time like system("/bin/date -s xxx") and then send(anything) to server immediately, the tap0 node sometimes will be removed, netlink monitor will receive a RTM_DELADDR, if_name is tap0, which means its ipaddress has been deleted.
What I have tried:
- after connected, change sys time on terminal(
/bin/date -s xxx) thensend(anything)to server. Cannot reproduce - after connected, call like below, Cannot reproduce.
system("/bin/date -s xxx");
sleep(1);//sleep 1s
send(anything);
- after connected, call like below, Can reproduce sometimes.
system("/bin/date -s xxx");
//sleep(1);//sleep 1s
send(anything);
- try to use different version of openvpn, get the same result.
We don't see any information about deleting this node in our local log file.
So my questions are:
- Did the openvpn server delete this node or any others(like tcp proto or drivers)?
- Why it delete it?
Thanks for any suggestions.
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（1）
捕获OpenVPN的日志后，会出现ping检查超时错误，然后调用命令：
/sbin/ifconfig tap0 0.0.0.0.0.0.0“ping检查功能在OpenVPN的主循环中调用，如果发送了一些东西，它将被调用
。 ）或
getTimeofday（），该>取决于系统时间，如果last是在重置时间之前获得的，而现在是追随它，然后（如果现在和最后一个之间的D值太大）会导致有意义的超时错误。
After catch the log of openvpn, there is a ping check timeout error, and then call the command:
/sbin/ifconfig tap0 0.0.0.0"The ping check function was called in the main loop of openvpn, and if there is something sent, it will be called.
The ping check function use 2 variable,
lastandnow, both of them was get fromtime(NULL)orgettimeofday(), which depends on the system time, if thelastwas get before the time resetting andnowwas get after it, then(if the D-value between now and last is too large) will cause a timeout error.That make sense, so you can't change the system time of at least Linux at will