wake on lan not working

I was able to setup wake on lan on my main machine that I intended to use while away on holiday, I tested it with my laptop using the public ip address method, forwarded the port on firewall and everything else seemed to work. I left the machine on sleep.

now I've left the country and I'm trying to wake it up remotely but nothing happens. is there anything I could try? I have my main machine ip address, is there a way to figure out or find the mac address in teamviewer so I can try WOL with another tool pheraps?  

thanks for any help!