Why is Vivaldi connecting to 239.255.255.250 port 1900 UDP (ssdp) and requires it.

Deedjee

Hi all,

Long Time user.

I wonder about a "required" connection (f.i Vivaldi x64 portable, vanilla)
I've read about all there is to read about it, but perhaps missed the/any conclusive info.

This forum should be the place to be i suppose.

Note:
ssdp discovery service (SSDPSRV) is disabled on this W7x64 pro system.
UPnP Device Host (upnphost) is also disabled

Question:

about : 239.255.255.250 port 1900 UDP (ssdp)

When i block 239.255.255.250 via ESET Vivaldi reports my internet connection is blocked.

Why is Vivaldi using this port/protocol and requires it.

Have a great day!

Deedjee

This post is deleted!

Pathduck

@Deedjee That's a local multicast IP address, and it tries to discover devices on the local network using SSDP.
https://en.wikipedia.org/wiki/Simple_Service_Discovery_Protocol

If I was to guess, it's to discover ChromeCast, probably from the (hidden) Chrome Media Router extension. Not sure how to disable it, but it shouldn't be required for Vivaldi to function. Are you saying Vivaldi does not work if this traffic is blocked?

Here's some possible workarounds:
http://walkersam.blogspot.com/2018/05/disable-ssdp-traffic-within-google.html

Deedjee

Pathduck thanks for your reply.

I've tested all kinds of instances, even with all cast related flags disabled it still will need that connection to be made.

Like this as referral to above alinea, as among lots of others over the web. : https://forum.vivaldi.net/topic/39654/upnp-ssdp-m-search-broadcast

I can however never find a defenitive conclusion why its done and crucially required for vivaldi to run(as in connect to the internet)why its like kinda spoofing over port 1900 as ssdp.

No tinfoil hat, but just curious why i cant find any resolve but half answered discontinued discussions for connections Vivaldi makes.

I wish i was technically able to filet the packets wich are send. I just don't have the spare time to invest in it.

It can be my mistake taking Vivaldi for a browser not connected to google, wich really not makes sense, Vivaldi beeing Chromium based to begin with, but it's the vibe i always got from Vivaldi.

it's more interest than a real problem.

Thanks and have a fine day!

Komposten

@Deedjee said in Why is Vivaldi connecting to 239.255.255.250 port 1900 UDP (ssdp) and requires it.:

No tinfoil hat, but just curious why i cant find any resolve but half answered discontinued discussions for connections Vivaldi makes.

Vivaldi posted a blog article in November last year detailing all connections the browser makes: Decoding network activity in Vivaldi. That should hopefully answer many of the half-answered discussions.

Not sure if it helps explain your particular connection, though.

Pathduck

@Deedjee Well, I don't think these SSDP connections matter much. After all Windows itself sends constant SSDP traffic on the local network, unless you disable the service. And lose some functionality like network device discovery etc.

Out of curiosity, I tried to disable the "Media Router" options in the Flags, but it still sends traffic.

Unfortunately Vivaldi has several built-in and hidden extensions inherited from Chromium, in effect Google service extensions. These include:

Web Store
CryptoTokenExtension
Cloud Print
Chromium PDF Viewer
Google Hangouts

The first two are probably necessary, without Web Store extensions probably wouldn't work. They probably generate network traffic, especially Hangouts I know connects to accounts.google.com on launch.

But I really wish there was a way to completely and permanently disable the rest of the extensions. If people absolutely need them they can install it themselves.

Deedjee

Thanks Pathduck and Komposten, for your replies.

Komposten, im sure going to check out the link you provided, sounds very interesting.
Alas not directly today as im very busy

My "particular connection" has some mysteries for me also, as when i manually block some of those previously named connections with ESET, Vivaldi (and Opera and Chrome for that matter btw) say "nope your internet connection is blocked. so sorry."

But hey when i put those connections in my hosts file as "127.0.0.1 etcetera.com" connections seems to be succesfully blocked, and Vivaldi is silent and browses on like nothing happened. Im still a noob superuser after all these years im afraid. Some things i get lol but some ..
This excludes the 239.255.255.250 btw.
But this facet is a bit off the scope of my topicstarter question.

Just as you, Pathduck, i concluded flagging of related flags was to no avail.

With respect to ssdp agreed no worries, but as i disabled ssdp and upnp, i dont want Vivaldi (better said "a chromium based browser") to go and adventure on its own on those ports and protocols. At least i want to be able to disable.

A browser should imo stay in the logical boundaries of beeing a browser and cast features etc .. who uses them? 0.1 %?
If i want a feature or extension i search for it and check it out, if i don't like it, i revert.
These features and gizmo's do not give me that choice by default, imo they are forced upon users. Thats an negative issue for me.

As said i will check out the link and read some related, thanks for your input both.

Have a cool weekend !

Deedjee

off topic: Could not edit my post as it was

"ERROR Post content was flagged as spam by Akismet.com"

sigh.