150M : Multicast DNS vulnerability letter from VM

[SnoopZ]

Received a letter from VM saying they have identified a potential Multicast DNS vulnerability on my network.

Anyone else had something like this, i am not too worried at the moment judging by this thread over at VM as i run a PS4, Xbox One and an Amazon Fire TV stick but i am interested to know what you guys may think of it as it is all a little complicated to the average user!

Going to the shadowserver link in the letter hurts my braincell!

[Kushan]

Yup, I had a similar and equally unhelpful letter.

Basically, the letter is telling you that you have port 5353 exposed to the outside world. That's about it.

Port 5353 is used by Bonjour and some other network services, think things like Plex. Block that from being exposed and you're all good.

For me I had forwarded it to my Plex server, but it's not required.

[SnoopZ]

Thanks, I will get that sorted out.

[SnoopZ]

Originally Posted by Kushan

Yup, I had a similar and equally unhelpful letter.

Basically, the letter is telling you that you have port 5353 exposed to the outside world. That's about it.

Port 5353 is used by Bonjour and some other network services, think things like Plex. Block that from being exposed and you're all good.

For me I had forwarded it to my Plex server, but it's not required.

I havent really ventured into messing with ports before so could you explain where i need to go in the Hub3 settings to do this please?

[Kushan]

I'm actually not sure. If you've not explicitly forwarded the port yourself, then it's probably a device on your network that's requested it via UPnP. What kind of media players, etc. do you have? Like Apple TV, etc.

[SnoopZ]

Originally Posted by Kushan

I'm actually not sure. If you've not explicitly forwarded the port yourself, then it's probably a device on your network that's requested it via UPnP. What kind of media players, etc. do you have? Like Apple TV, etc.

I probably installed an Amazon Fire Stick around the date on the letter, but i also have an Xbox One and PS4 and a plex server but suspect the letter is because of the stick.

[Kushan]

Plex definitely suggests using the port, it was Plex on my network so I'd say it's the number 1 contender.

[SnoopZ]

Still wondering how to do this port blocking, someone must know.

---------- Post added at 17:59 ---------- Previous post was at 17:33 ----------

Just found this which says i cant block ports on the Hub3 is that correct??

http://community.virginmedia.com/t5/...ighlight/false

[tidder23]

go to http://192.168.0.1/
login
click on the Advanced Settings button
scroll down to UPnP and click on it
uncheck the box to disable UPnP
click on the apply button

disabling UPnP will stop stuff on your network from Port Forwarding automatically

if you want to no more :
What Is Port Forwarding & How Can It Help Me?

[SnoopZ]

Originally Posted by tidder23

go to http://192.168.0.1/
login
click on the Advanced Settings button
scroll down to UPnP and click on it
uncheck the box to disable UPnP
click on the apply button

disabling UPnP will stop stuff on your network from Port Forwarding automatically

if you want to no more :
What Is Port Forwarding & How Can It Help Me?

Thanks for the reply, still not sure i want to disable it though as i have games consoles and a network printer from which i may need it.

But to be honest i don't really know anything about this either! haha

[Kushan]

Yeah, don't disable UPnP, not unless you want to go back to the bad old days of having to manually forward every port going.