https://blog.margrop.net/en/tag/%E9%98%B2%E7%81%AB%E5%A2%99/ Recent content in 防火墙 on Margrop Blog Hugo -- gohugo.io en-US Sun, 26 Feb 2023 20:04:53 +0800 https://blog.margrop.net/en/post/ubuntu-add-port-filter-using-iptables/ Sun, 26 Feb 2023 20:04:53 +0800 https://blog.margrop.net/en/post/ubuntu-add-port-filter-using-iptables/ <h1 id="add-firewall-rules-on-ubuntu-2204">Add firewall rules on Ubuntu 22.04</h1> <h2 id="check-firewall-status">Check firewall status</h2> <pre tabindex="0"><code>ufw status </code></pre><h2 id="open-port-22">Open port 22</h2> <pre tabindex="0"><code>ufw allow 22 </code></pre><h2 id="check-firewall-status-again">Check firewall status again</h2> <pre tabindex="0"><code>ufw status </code></pre>