ssh not working when in a wireless network

[tevang]

I have noticed that I cannot connect through ssh to the computers at the lab whenever I am in a wireless network. In contrast, when I plug in the ethernet cable the problem is resolved. Sometimes I noticed that when I was connected through a cable to a local network and hibernated the laptop, I could connect to other wireless networks. Here is the output I get:

$ ssh -vvv thomaslab
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to thomaslab [195.134.80.81] port 22.
debug1: connect to address 195.134.80.81 port 22: Connection timed out
ssh: connect to host thomaslab port 22: Connection timed out

Does anyone have any idea how to fix this? Btw, I use CentOS 6.6 and so do the computers in my lab.

[gerald_clark]

Where are you when this occurs, at home or at the lab?
Perhaps the lab blocks ssh connections from the wireless network.

[tevang]

I am not in the lab. How can I change that setting or deceive the lab's router?

[gerald_clark]

Take it up with your IT department.