基于github.com上面进行push, pull操作遇到如下问题

ssh: connection to host port: 22: Connection timed out lost connection

解决步骤如下：

测试ssh

输入:

ssh -v git@github.com

如果输出如下

    OpenSSH_5.8p1, OpenSSL 1.0.0d 8 Feb 2011
    debug1: Connecting to github.com [207.97.227.239] port 22.
    debug1: connect to address 207.97.227.239 port 22: Connection timed out
    ssh: connect to host github.com port 22: Connection timed out
    ssh: connect to host github.com port 22: Bad file number

linux的Bad file number是Timeout

检测ssh端口是否被封

输入

nmap -sS github.com -p 22

可能看到如下输出：

    Starting Nmap 5.35DC1 ( http://nmap.org ) at 2011-11-05 10:53 CET
    Nmap scan report for github.com (207.97.227.239)
    Host is up (0.10s latency).
    PORT   STATE    SERVICE
    22/tcp ***filtered*** ssh

    Nmap done: 1 IP address (1 host up) scanned in 2.63 seconds

如果看到filtered则表明22端口被防火墙封闭了

解决问题

在~/.ssh/config(windows是C:\Users\USERNAME.ssh\config)内添加(config文件没有就创建之)

Host github.com
User git
Hostname ssh.github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/id_rsa
Port 443

运行：

ssh -T github.com