你们的 github ssh 还能用吗？

坐标帝都，最近几天 github ssh 总是上不去，错误如下：

ssh -T -v [email protected]

OpenSSH_7.5p1, OpenSSL 1.0.2k 26 Jan 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to github.com [192.30.255.112] port 22.
debug1: connect to address 192.30.255.112 port 22: Connection timed out
debug1: Connecting to github.com [192.30.255.113] port 22.
debug1: connect to address 192.30.255.113 port 22: Connection timed out
ssh: connect to host github.com port 22: Connection timed out

有没有类似的同学？

有什么好办法解决？

谢谢