What 'that' indicates

While this might not work for everyone, some people have found this method to be useful. You can manually specify a port in your Torrent client and switch to either Port 80 or port 8080. These ports are not blocked by ISPs and in some cases can be useful in downloading Torrents. Also make sure that you disable UPnp and Nat-PMP port mapping, that too can slow down to shut down your torrents. In fact, I have observed that disabling these two options on restricted networks can often begin Torrent downloads, however at a slow speed.

I'd like to know whether "that" indicates "UPnp and Nat-PMP port mapping."
Thank you in advance for your help.