当我尝试运行'git push heroku master'时，我收到了错误
ssh: connect to host heroku.com port 22: Connection timed out
fatal: The remote end hung up unexpectedly
我运行命令'ssh -vvv git@heroku.com'来了解发生了什么，结果是
OpenSSH_5.9p1 Debian-5ubuntu1.3, OpenSSL 1.0.1 14 Mar 2012
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to heroku.com [50.19.85.154] port 22.
debug1: connect to address 50.19.85.154 port 22: No route to host
debug1: Connecting to heroku.com [50.19.85.132] port 22.
debug1: connect to address 50.19.85.132 port 22: No route to host
debug1: Connecting to heroku.com [50.19.85.156] port 22.
debug1: connect to address 50.19.85.156 port 22: No route to host
ssh: connect to host heroku.com port 22: No route to host
我是部署和ssh的新手。请帮忙。