Messages won't send/receive on iMac and iPad - Internet Problem

Hey Guys,

A couple of weeks ago I noticed that my iMessages weren't sending or receiving on my iPad or iMac, but still work on my iPhone. I've checked my accounts on each device and they're all on the same Apple ID, and repeatedly signed in and out on all devices, logged in and out, etc. all to no avail.

I noticed, however, that when I took my iPad to uni and connected to the wifi there, all my messages seemed to quickly adjust and become up to date, but would stop doing it as soon as I got home. After seeing this, I'm guessing theres a connection problem at home, as my dad and sister are also experiencing some problems on their iDevices also.

Is there any settings that I could change on my home internet to get messages up and running again?

Thanks!