Ubuntu server 22.04 SSL证书安装失败

[githubman1918]

Created symlink /etc/systemd/system/multi-user.target.wants/caddy.service → /etc/systemd/system/caddy.service.
Obtaining and Installing an SSL Certificate...
Certificate application failed, please check your server firewall and network settings

[yunxpeng]

same problem for me

[laizi-dotcom]

关闭防火墙就行了，sudo ufw disable

[Talaxy009]

我把 ipv6 的解析删掉就好了