Can't get onto my brother's server, and vice versa, across local network in Terraria

I have a similar problem to Shadow Z, in his original question.
My problem differs, however, since I have already followed the instructions to set up my MQWest modem for port forwarding. I also do not need Hamachi, since I'm already on the same LAN network as my brother. I've already tried everything suggested, before, but nothing works.
My main question is how do I check if Terraria can access data from the forwarded port, but I also want to know if there is anything else I could try. Any help would be appreciated, thanks!
Random info, in case if any of it can help solve my problem.
Router IP: 192.168.0.1
Port Number: 7777
Modem Brand: MyQwest
Computer: Shuttle desktop, with Windows XP
Btother's Computer: Dell laptop, with Windows 10
We are both using bandwith, connected to the same router.
Best Answer
If you're on the same LAN, you want to use your internal IP address, not your public one.
When trying to find your IP address, it's common to check websites such as http://www.whatismyip.com/ which will display it for you. However, this IP address is the internet-facing one, and is only usable for connecting to users that aren't on the same LAN as you. To connect to other users on the same LAN, you need to use the IP address your router assigns you within the LAN itself.
To find your local IP on Windows, first open the Command Prompt (one possible way to do this is to open the Run dialog box with Win+R and type "cmd"). In the command prompt, type the command "ipconfig". This will provide a number of pieces of information, of which you will want to find the entry for "IPv4 Address."
Depending on your computer's setup, there may be more than one IPv4 Address. Given your router's IP address is in the format 192.168.x.x, you'll want the IPv4 address that follows the same format, which should be paired with the "Default Gateway" entry that matches your router's IP. Other possible formats exist, such as 10.x.x.x, but yours is the most common for home networks.
Whoever is hosting the server should look up this address on the host computer, and then the other person (on the same LAN) should use that address to connect to the host computer. If you want to also include players from outside your LAN, they must still use the internet-facing IP address, as found on a website such as the one mentioned above.
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Why cant my friend join my server in Terraria?
If your friends can't connect to Terraria server, using steam invite can solve this sometimes. Updating the network driver will solve the problem if the driver problem was behind it. Tweaking Windows Firewall or any other third-party firewall settings can be another effective solution.Can you Play Terraria on different networks?
Host & Play games are started via the regular Terraria application. The first player chooses "Host & Play", chooses options, and starts the world, becoming the host. Other network or internet players can then join, by choosing "Join" from the multiplayer menu or "Join via Steam" if they are friends on Steam.How do I join a Terraria server on the same network?
Connecting to a Server In the Terraria game, go to Multiplayer->Join via IP->Select your character->Type in the IP for the server.Can - Mother Sky (1970) [HQ]
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