First Computer
[12:40:33] [main/INFO]: Setting user: Mike O
[12:40:34] [Client thread/INFO]: LWJGL Version: 2.9.0
[12:40:36] [Client thread/INFO]: Reloading ResourceManager: Default, FMLFileResourcePack:Forge Mod Loader, FMLFileResourcePack:Minecraft Forge, FMLFileResourcePack:Pet Bat
[12:40:37] [sound Library Loader/INFO]: Sound engine started
[12:40:37] [Client thread/INFO]: Created: 1024x512 textures/blocks-atlas
[12:40:37] [Client thread/INFO]: Created: 256x256 textures/items-atlas
[12:40:37] [MCO Availability Checker #1/ERROR]: Couldn't connect to Realms
[12:40:42] [server thread/INFO]: Starting integrated minecraft server version 1.7.2
[12:40:42] [server thread/INFO]: Generating keypair
[12:40:42] [server thread/INFO]: Preparing start region for level 0
[12:40:43] [server thread/INFO]: Mike O[local:E:1490996f] logged in with entity id 395 at (165.92500001192093, 99.0, 363.37401788514006)
[12:40:43] [server thread/INFO]: Mike O joined the game
[12:41:04] [server thread/INFO]: Saving and pausing game...
[12:41:04] [server thread/INFO]: Saving chunks for level '3000'/Overworld
[12:41:04] [server thread/INFO]: Saving chunks for level '3000'/Nether
[12:41:04] [server thread/INFO]: Saving chunks for level '3000'/The End
[12:41:10] [Client thread/INFO]: Started on 50577
[12:41:10] [Client thread/INFO]: [CHAT] Local game hosted on port 50577
[12:45:17] [server thread/INFO]: Stopping server
[12:45:17] [server thread/INFO]: Saving players
[12:45:17] [server thread/INFO]: Saving worlds
[12:45:17] [server thread/INFO]: Saving chunks for level '3000'/Overworld
[12:45:17] [server thread/INFO]: Saving chunks for level '3000'/Nether
[12:45:17] [server thread/INFO]: Saving chunks for level '3000'/The End
[12:45:18] [Client thread/INFO]: Stopping!
Second Computer
[12:42:00] [main/INFO]: Setting user: Jonathon
[12:42:01] [Client thread/INFO]: LWJGL Version: 2.9.0
[12:42:05] [Client thread/INFO]: Reloading ResourceManager: Default, FMLFileResourcePack:Forge Mod Loader, FMLFileResourcePack:Minecraft Forge, FMLFileResourcePack:Pet Bat
[12:42:06] [sound Library Loader/INFO]: Sound engine started
[12:42:07] [Client thread/INFO]: Created: 1024x512 textures/blocks-atlas
[12:42:07] [Client thread/INFO]: Created: 256x256 textures/items-atlas
[12:42:08] [MCO Availability Checker #1/ERROR]: Couldn't connect to Realms
[12:42:16] [Client thread/INFO]: Connecting to 10.0.0.2, 50577
[12:44:54] [Client thread/INFO]: Stopping!
Both stopping was done manually after waiting and failing to connect.
Here is same thing without Forge
First Computer
[12:55:07] [main/INFO]: Setting user: Mike O
[12:55:07] [main/INFO]: (Session ID is token:1337535510N:Mike O)
[12:55:07] [Client thread/INFO]: LWJGL Version: 2.9.0
[12:55:07] [Client thread/INFO]: Reloading ResourceManager: Default
[12:55:08] [sound Library Loader/INFO]: Sound engine started
[12:55:08] [Client thread/INFO]: Created: 1024x512 textures/blocks-atlas
[12:55:08] [Client thread/INFO]: Created: 256x256 textures/items-atlas
[12:55:09] [MCO Availability Checker #1/ERROR]: Couldn't connect to Realms
[12:55:13] [server thread/INFO]: Starting integrated minecraft server version 1.7.2
[12:55:13] [server thread/INFO]: Generating keypair
[12:55:14] [server thread/INFO]: Preparing start region for level 0
[12:55:14] [server thread/INFO]: Mike O[local:E:5a01bd0e] logged in with entity id 375 at (165.92500001192093, 99.0, 363.37401788514006)
[12:55:14] [server thread/INFO]: Mike O joined the game
[12:55:20] [server thread/INFO]: Saving and pausing game...
[12:55:20] [server thread/INFO]: Saving chunks for level '3000'/Overworld
[12:55:20] [server thread/INFO]: Saving chunks for level '3000'/Nether
[12:55:20] [server thread/INFO]: Saving chunks for level '3000'/The End
[12:55:25] [Client thread/INFO]: Started on 50799
[12:55:25] [Client thread/INFO]: [CHAT] Local game hosted on port 50799
[12:56:17] [server thread/INFO]: Jonathon[/10.0.0.5:51021] logged in with entity id 5158 at (160.39754641485408, 102.27882139915464, 362.22831581276125)
[12:56:17] [server thread/INFO]: Jonathon joined the game
[12:56:17] [Client thread/INFO]: [CHAT] Jonathon joined the game
[12:56:50] [server thread/INFO]: Jonathon lost connection: TextComponent{text='Disconnected', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null}}
[12:56:50] [server thread/INFO]: Jonathon left the game
[12:56:50] [Client thread/INFO]: [CHAT] Jonathon left the game
[12:58:11] [server thread/INFO]: Stopping server
[12:58:11] [server thread/INFO]: Saving players
[12:58:11] [server thread/INFO]: Saving worlds
[12:58:11] [server thread/INFO]: Saving chunks for level '3000'/Overworld
[12:58:11] [server thread/INFO]: Saving chunks for level '3000'/Nether
[12:58:11] [server thread/INFO]: Saving chunks for level '3000'/The End
[12:58:12] [Client thread/INFO]: Stopping!
Second Computer
[12:56:09] [main/INFO]: Setting user: Jonathon
[12:56:09] [main/INFO]: (Session ID is token:1337535510N:Jonathon)
[12:56:09] [Client thread/INFO]: LWJGL Version: 2.9.0
[12:56:10] [Client thread/INFO]: Reloading ResourceManager: Default
[12:56:10] [sound Library Loader/INFO]: Sound engine started
[12:56:11] [Client thread/INFO]: Created: 512x256 textures/blocks-atlas
[12:56:11] [Client thread/INFO]: Created: 256x256 textures/items-atlas
[12:56:11] [MCO Availability Checker #1/ERROR]: Couldn't connect to Realms
[12:56:18] [Client thread/INFO]: Connecting to 10.0.0.2, 50799
[12:56:51] [Client thread/INFO]: Stopping!
Both stopping was done manually after successful connecting