I was going to play with a friend offline with LAN, so I opened to LAN
What I expected to happen was...:
I thought that he'd be able to join
What actually happened was...:
He was not able to join and received a message something like this: Could not connect: Connection refused
Steps to Reproduce:
1. Two people log in to minecraft with the minecraft client, without being able to connect to mojang, play offline.
2. One start/load a world
3. Open to LAN
4. The other person try to join the LAN
Related issues
Comments

Duplicate of MC-2583.
I`m having this problem too. When I open to LAN in win7 64, the IP is 0.0.0.0:port. Says connection refused when someone tries to join