DaemonUmbra

Please read the logs section of my signature and post the appropriate log in the preferred manner.

Are you making mods or are you playing a modded game?

Where are you downloading Forge from because that version is ancient, meaning your version must be even MORE ancient.

It should give you a screen that gives you the mod IDs for the mods required

Backing up a second why do you have 2 spongeforge jars in the server?

I only see one thing in the log that mentions the console and it appears to line up with a bug in vanilla, according to the bug report it is because the game tries to read commands from the command line as well as the GUI Console. This problem should not affect the server if you start it with the nogui flag like in the bat I suggested, if you can give up the prettiness of the GUI a cmd window will give you pretty much everything you need to know (/list will give you a list of players whenever you get curious)

A bat file is just a text file that has a cmd command on each line to be run in sequence. My typical StartServer.bat: java -Xmx4G -Xms4G -jar [Forge Jar File Name] nogui pause Breaking this down:

If you are double clicking the jar file I don't think you are getting a cmd window, you are probably getting the server's GUI. I highly recommend running the server through a bat file if only so you can allocate more than the Java-defined default 1-2G of RAM. Could you please Gist the server's debug.log?

1.7.10 is no longer supported on these forums due to its age. Please update to a modern version of Minecraft to receive support.

If you didn't make any changes to it then delete the config for CodeChickenLib, it should be called codechickenlib.cfg or something similar, the link in my previous post will tell you how to get to the .minecraft folder

The config files are in the .minecraft/config folder, you don't need WinRar at all, they're text files.

Have you modified CodeChickenLib's config at all?

Yes

In your @Mod annotation you can set serverSideOnly to true and acceptableRemoteVersions to *

Open the bat Discult gave you (you can right click it and there will be an "edit" option, it's just a fancy text file), and put pause on a new line at the end. Run it again and you should get a command window that stays open after announcing an error.

Make sure all your mods are up to date, CoFHCore especially

Is this world from a different pack or have mods otherwise been removed from the pack since this world was generated? Unfortunately I can't tell anything further, the errors are very ambiguous and I suspect Hamachi may be to blame.

Unfortunately the error where it disconnects you only indicates that the server is diconnecting you, I would need the server log to determine why. I am still seeing your client complaining about missing registry entries from the following Mod IDs: dungeondq mystic lycanitesmobs (Registers its modules as separate mods, make doubly sure the configs for this mod are identical) arcticmobs demonmobs infernomobs junglemobs shadowmobs swampmobs

Can I have a debug.log of a run without Xaero's?

Have both of you removed it?

Try removing Xaero's Minimap

Your friend connects to the server just fine, right?

Please use GitHub's Gist then

In your log I see a lot of missing blocks and a network error, this suggests you are missing mods. Could you provide your debug.log? It has more information.