Factorio Forums

Thanks for the report however since you're the only person I've ever seen have this issue i'm going to just blame it on your faulty router and tell you to disable the security feature on it since it's false-flagging the game traffic.

Security options in a firewall are there for a reason and prevent malicious connection attempts from happening and damaging your network.

Disabling that should NEVER be the way forward!

As with the similar thread about a firewall being flooded with packets that has been marked as NaB, this is just discarded as well.

As maps are growing and the amount of packets to be transferred grows, more firewalls might go block the game and if nothing is done to reduce the packets, more and more people won't be able to connect to multiplayer games.
Reducing the upload speed of a server might seem like a workaround, but load-times will increase drastically - if you are able to change that - making even more ppl stop playing.

There is nothing to reduce packet wise: if you want the map downloaded it has to be sent to you the player. That means it gets broken up into packets and sent over.