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ルール未定義のまま雑に firewall を有効化したらサーバにアクセスできなくなった
incoming な通信へのデフォルトのポリシーが drop、そりゃそうだわな……
Disable firewall from command line | Proxmox Support Forum
https://forum.proxmox.com/threads/disable-firewall-from-command-line.29091/
> pve-firewall stop
>
> This stops the firewall until next reboot or update of any packed what restart the pve-firwall.
ｳｯｽ
Proxmox firewall rules configuration - Virtualization Howto
https://www.virtualizationhowto.com/2022/10/proxmox-firewall-rules-configuration/
> The firewall blocks all traffic by default!
>
> As a word of wisdom and warning, when you enable the Proxmox firewall service at the datacenter level, traffic to all hosts is blocked by default. There are two exceptions to that traffic block behavior:
>
> * Web GUI – port 8006
> * SSH – port 22
>
> These two ports are left open when you enable the firewall service at the datacenter level.
ふーむ？