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Ubuntu 间歇性拒绝新的网络连接

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Ubuntu 间歇性拒绝新的网络连接

我有一台运行 Ubuntu 22.10 的桌面，它允许 SSH 连接，并在其上运行 Plex 服务器。它通常运行良好，但偶尔会拒绝连接 - SSH 失败，连接被拒绝，新的 Plex 窗口也是如此。网络没有中断；任何现有视频流都不会停止，打开的 SSH shell 将继续工作，我只是无法添加新连接。

我是否应该更改设置以增加入站连接或确保端口保持畅通？

编辑：journalctl 没有返回任何对我而言像是确凿证据的东西。昨天多次出现此连接错误，这是 NetworkManager 的整天日志：

Mar 29 00:00:43  NetworkManager[864]: <info>  [1680062443.3505] dhcp4 (enp1s0): state changed new lease, address=192.168.1.52
Mar 29 00:56:58  NetworkManager[864]: <info>  [1680065818.2973] dhcp4 (enp1s0): state changed new lease, address=192.168.1.52
Mar 29 01:51:41  NetworkManager[864]: <info>  [1680069101.3066] dhcp4 (enp1s0): state changed new lease, address=192.168.1.52
Mar 29 02:47:40  NetworkManager[864]: <info>  [1680072460.2969] dhcp4 (enp1s0): state changed new lease, address=192.168.1.52
Mar 29 03:41:31  NetworkManager[864]: <info>  [1680075691.3097] dhcp4 (enp1s0): state changed new lease, address=192.168.1.52
Mar 29 04:36:15  NetworkManager[864]: <info>  [1680078975.3003] dhcp4 (enp1s0): state changed new lease, address=192.168.1.52
Mar 29 04:53:46  NetworkManager[864]: <info>  [1680080026.3071] manager: NetworkManager state is now CONNECTED_SITE
Mar 29 04:53:46  NetworkManager[864]: <info>  [1680080026.4636] manager: NetworkManager state is now CONNECTED_GLOBAL
Mar 29 05:31:29  NetworkManager[864]: <info>  [1680082289.2930] dhcp4 (enp1s0): state changed new lease, address=192.168.1.52
Mar 29 06:24:14  NetworkManager[864]: <info>  [1680085454.3034] dhcp4 (enp1s0): state changed new lease, address=192.168.1.52
Mar 29 07:19:56  NetworkManager[864]: <info>  [1680088796.3271] dhcp4 (enp1s0): state changed new lease, address=192.168.1.52
Mar 29 08:04:06  NetworkManager[864]: <info>  [1680091446.3069] manager: NetworkManager state is now CONNECTED_SITE
Mar 29 08:04:07  NetworkManager[864]: <info>  [1680091447.5300] manager: NetworkManager state is now CONNECTED_GLOBAL
Mar 29 08:14:57  NetworkManager[864]: <info>  [1680092097.3178] dhcp4 (enp1s0): state changed new lease, address=192.168.1.52
Mar 29 08:39:27  NetworkManager[864]: <info>  [1680093567.3073] manager: NetworkManager state is now CONNECTED_SITE
Mar 29 08:39:27  NetworkManager[864]: <info>  [1680093567.5565] manager: NetworkManager state is now CONNECTED_GLOBAL

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