请问这种情况无法安装是ip被拉黑了吗

root@debian:~# if [ -f /usr/bin/curl ];then curl -sSO https://io.bt.sb/install/install_panel.sh;else wget -O install_panel.sh https://io.bt.sb/install/install_panel.sh;fi;bash install_panel.sh
curl: (28) Failed to connect to io.bt.sb port 443 after 16677 ms: Couldn’t connect to server
bash: install_panel.sh: No such file or directory