Query packets aren't received by other hosts on local network

[mtharrison]

Firstly, I apologise that this is a really basic question. I have two machines on the same network. On machine 1 I have this script, which just listens for all queries:

var mdns = require('multicast-dns')()

mdns.on('query', function (query) {
  console.log('got a query packet:', query)
});

On the other machine I have this script, which makes a query every second:

var mdns = require('multicast-dns')()

mdns.on('response', function(response) {
  console.log('got a response packet:', response)
})

setInterval(function () {
    mdns.query({
      questions:[{
        name: 'myservice.local',
        type: 'A'
      }]
    })
}, 1000);

I was expecting the query from machine 2 to be received at machine 1 but there's no output at all from machine 1. I can see the DNS packets being sent from machine 2 in Wireshark:

Any pointers on why this doesn't work as I was expecting?

[mtharrison]

I messed around with my router settings for a while, flipped a bunch of buttons, went a bit crazy and then it just worked! 🎉