Heya! So first post, used a ton of ideas from here so now I can give at least something back.
Usually you phase into your garrison when you walk near the phase line in frostfire ridge (or shadowmoon valley). Horde or Allie gankers will use this phase to save themselves after ganking. This is how you can chase after them. I also tested and verified this process.
Using a system that I first learned in this post
http://www.ownedcore.com/forums/worl...ploit-crz.html (Peerblock and you - A guide to exploit CRZ)
While in your garrison, open up a cmd prompt (Windows start menu, type in cmd in the run menu). Run the command "netstat" and it will show you some active IP addresses. You want to look at the ones that say "established" You want to block the ip associated with your region (these are the warcraft IP addresses as a reference from
https://us.battle.net/support/en/art...g-a-traceroute)
The Americas
12.129.209.68
199.108.62.157
Europe
213.155.155.233
185.60.114.159
Oceania
103.4.115.248
I had to block 2 IP ranges (199.108.xxx.1-255 and such. Will be different depending where you are. I used my own firewall setup to do these blocks). Once setup, I would leave my garrison and enable the IP blocks. When you try to phase into your garrison you will get a "instance has been aborted" msg.
Bam...you can now freely walk in and kill those mofo gankers =) Disable the blocks while you are outside of the garrison to get back into your garrison.