So I turned my old laptop into a home server. Both the server (old laptop) and my main machine are connected to the same router wirelessly. Both are running Ubuntu 18.04. Everything seemed to work fine until I decided to test network speed.
Using iperf3 connecting to my main machine from the server I get ~13Mbps. That's a little low even considering that the server only supports 802.11g, but that's the same speed I get when transferring files over SFTP.
What's really surprising tho is that connecting to remote (public) iperf3 servers I consistently get ~20Mbps.
I don't know much about networking so I have no clue what could be causing this. How can I "fix" my server/network so I get better speeds?