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class="sidebar-link-item">FAQ</p><ul class="sidebar-links"><li class="sidebar-link"><a class="sidebar-link-item active" href="/en_US/guide/q2">Let the Agent start/on-line, and the self-test process of the problem</a><!----></li><li class="sidebar-link"><a class="sidebar-link-item" href="/en_US/guide/q3">Reverse Proxy gRPC Port (support Cloudflare CDN)</a><!----></li><li class="sidebar-link"><a class="sidebar-link-item" href="/en_US/guide/q4">Real-time channel disconnection/online terminal connection failure</a><!----></li><li class="sidebar-link"><a class="sidebar-link-item" href="/en_US/guide/q5">How do I migrate my data to the new server and restore my backups?</a><!----></li><li class="sidebar-link"><a class="sidebar-link-item" href="/en_US/guide/q6">How to set up a monthly reset of data statistics?</a><!----></li><li class="sidebar-link"><a class="sidebar-link-item" href="/en_US/guide/q7">How to customize Agent monitoring?</a><!----></li></ul></li><li class="sidebar-link"><p class="sidebar-link-item">Troubleshooting Guide</p><ul class="sidebar-links"><li class="sidebar-link"><a class="sidebar-link-item" href="/en_US/guide/dashboardq">Dashboard</a><!----></li><li class="sidebar-link"><a class="sidebar-link-item" href="/en_US/guide/agentq">Agent</a><!----></li><li class="sidebar-link"><a class="sidebar-link-item" href="/en_US/guide/loginq">Login</a><!----></li></ul></li><!--]--></ul><!--[--><!--]--></aside><div class="sidebar-mask"></div><main class="page" data-v-7eddb2c4><div class="container" data-v-7eddb2c4><!--[--><!--]--><div style="position:relative;" class="content" data-v-7eddb2c4><div><h4 id="let-the-agent-start-on-line-and-the-self-test-process-of-the-problem" tabindex="-1">Let the Agent start/on-line, and the self-test process of the problem <a class="header-anchor" href="#let-the-agent-start-on-line-and-the-self-test-process-of-the-problem" aria-hidden="true">#</a></h4><ol><li>Run <code>//opt/nezha/agent/nezha-agent -s IP/Domin(Panel IP or Domain not connected to CDN):port(Panel RPC port) -p secret(Agent Secret) -d</code> Check the logs to see if the timeout is due to a DNS problem or poor network</li><li><code>nc -v domain/IP port(Panel RPC port)</code> or <code>telnet domain/IP port(Panel RPC port)</code> to check if it&#39; s a network problem, check the inbound and outbound firewall between the local machine and the panel server, if you can&#39; t determine the problem you can check it with the port checking tool provided by <a href="https://port.ping.pe/" target="_blank" rel="noopener noreferrer">https://port.ping.pe/</a></li><li>If the above steps work and the Agent is online, please try to turn off SELinux on the panel server. <a href="https://www.google.com/search?q=How+to+disable+SELinux" target="_blank" rel="noopener noreferrer">How to close SELinux</a></li></ol></div></div><footer class="page-footer" data-v-7eddb2c4 data-v-07c132fc><div class="edit" data-v-07c132fc><div class="edit-link" data-v-07c132fc 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