Ubuntu:ssh: connect to host github.com port 22: No route to host

I am using Ubuntu 11.10 and followed the help doc at github.com to set up git and connect to github but when I got to step 5 of the set up ssh keys section :Test everything out , When I used this command: ssh -T I got an error:

ssh: connect to host github.com port 22: No route to host

And I tried this command:

tcptraceroute github.com 22

Here is what I got:

Selected device eth0, address 222.20.58.XX(sorry...I masked part of my ip), port 33281 for outgoing packets
Tracing the path to github.com (207.97.227.239) on TCP port 22 (ssh), 30 hops max 1 222.20.58.254 0.891 ms 0.850 ms 0.693 ms 2 zxq-xs-h3c7510e.hust.edu.cn (115.156.255.137) 1.253 ms 1.569 ms 2.837 ms 3 zxq-xs-rjs8606.hust.edu.cn (115.156.255.130) 0.729 ms 0.678 ms 0.629 ms 4 115.156.255.174 0.794 ms 6.279 ms 16.569 ms 5 * * * 6 * * * 7 * * * 8 * * * 9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *
Destination not reached

It seems that the route is stopped at 115.156.255.174, which I don't know where it is.

Can anyone explain what's wrong here and how can I solve this?

Thanks very much.

1 Answer

just try to add the following to your ./.ssh/config: ( touch one if having no this file )

host github.com hostname ssh.github.com port 443

this solution is from Connection problems to github.com