Only 1 Person Able To Connect To Server

[Slugger]

Whenever I host only 1 person is able to connect, then whenever someone else tries to connect, they just send punch packets, how do I fix this?

[Ad Bot]

[Orion]

increase player max to 32.

[Frost_Sabre]

Whenever I host only 1 person is able to connect, then whenever someone else tries to connect, they just send punch packets, how do I fix this?

Enable UPNP, if it isnt enabled.
If that ceases to work...

Portforward.