Can't make lobby's

Hardware Hub Networking
1

I have recently discovered that my internet is playing up, I cant create any online lobby's for my games or anything

its my network, not my PC because I have tried on my laptop as well.

Any help would be greatly appreciated :)

 

router:

Bigpond TechnicolorTG825n

 

~Jezza

EDIT: I can join games just not make them.

3

I know thanks for replying, I double posted because I was getting impatient and I will try the things you have suggested thank you so much!