如何修复 apt-get update 在我的 Linux 容器上不起作用的问题

Question

我使用以下命令创建了一个 Linux 容器。 sudo LXC 创建 k3_7.8 容器名称

容器创建成功后，我无法运行 apt-get update 命令。请查看Linux容器内的当前配置。

System information 
root@newContainer:~# lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 8.4 (jessie)
Release:        8.4
Codename:       jessie
root@newContainer:~#

root@container:/var/lib/apt# cat  /etc/apt/apt.conf
Acquire::Check-Valid-Until "false";

root@container:/var/lib/apt# cat /etc/apt/sources.list
deb http://deb.debian.org/debian/ jessie main contrib non-free
deb-src http://deb.debian.org/debian/ jessie main contrib non-free

deb http://security.debian.org/ jessie/updates main contrib non-free
deb-src http://security.debian.org/ jessie/updates main contrib non-free

控制台快照：-

root@container:/var/lib/apt# sudo apt-get update
Get:1 http://ftp.de.debian.org sid InRelease [149 kB]
Err http://deb.debian.org jessie Release.gpg
  Connection failed [IP: 151.101.84.204 80]
Err http://security.debian.org jessie/updates Release.gpg
  Connection failed [IP: 151.101.84.204 80]

Do I need to update any configuration.