在Debian主机上获取图像时Docker超时

我在Debian上运行docker。从今天起，它工作得很完美，但今天我有严重的连接错误，从这台机器。 我也试着在我的boot2docker maschine上拉图像，但在debian服务器上它挂起了

$ uname -a

Linux hostname.tld 3.16.0-0.bpo.4-amd64 #1 SMP Debian 3.16.7-ckt2-1~bpo70+1 (2014-12-08) x86_64 GNU/Linux

$ sudo docker version

Client version: 1.4.1 Client API version: 1.16 Go version (client): go1.3.3 Git commit (client): 5bc2ff8 OS/Arch (client): linux/amd64 Server version: 1.4.1 Server API version: 1.16 Go version (server): go1.3.3 Git commit (server): 5bc2ff8

$ docker pull node:latest
Pulling repository node

FATA[0143] Get https://index.docker.io/v1/repositories/library/node/images: read tcp 162.242.195.84:443: i/o timeout 

我不知道今天为什么要暂停。请帮我找出哪里出了问题

以下是日志：

time="2015-01-31T23:09:21+01:00" level="info" msg="POST /v1.16/images/create?fromImage=node%3Alatest" 
time="2015-01-31T23:09:21+01:00" level="info" msg="+job pull(node, latest)" 
time="2015-01-31T23:09:21+01:00" level="info" msg="+job trust_update_base()" 
time="2015-01-31T23:09:21+01:00" level="info" msg="-job trust_update_base() = OK (0)" 
time="2015-01-31T23:10:21+01:00" level="error" msg="Error from V2 registry: Get https://registry-1.docker.io/v2/manifest/library/node/latest: read tcp 162.242.195.84:443: i/o timeout" 
time="2015-01-31T23:11:22+01:00" level="error" msg="Get https://registry-1.docker.io/v1/repositories/library/node/tags: read tcp 162.242.195.84:443: i/o timeout" 
Get https://registry-1.docker.io/v1/repositories/library/node/tags: read tcp 162.242.195.84:443: i/o timeout
time="2015-01-31T23:11:22+01:00" level="info" msg="-job pull(node, latest) = ERR (1)"

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我通过在配置中添加一个公共http代理解决了这个问题。

找到了什么？