Is my router causing lag problems?

[Slyph123]

I have a similar problem to this.
I use a 2Wire Router and I tend to get lag spikes very often which last for 3-4 seconds and its the kind of lag where clicking even without seeing yourself move doesn't help. This often kills me a lot because as a sage I mob, so you could see how annoying it gets. Anyways, maybe the same thing could work for me too but I don't know how to access my router firewall or know the ports for HeRO. If someone could help me out too that would be great :>