<![CDATA[Mysterious Uploads of Several GBs through Opera]]>For several weeks, I have noticed mysterious uploads commencing daily and sometimes uploading several gigabytes of data to several web addresses all have the address ..adnxs.com

I have tried placing the following in Windows hosts file:
127.0.0.1 ib.anycast.adnxs.com
127.0.0.1 adnxs.com
127.0.0.1 fra1-ib.adnxs.com

but this strange behaviour continues. It only happens through Opera and I am wondering why Opera allows this to happen. I can't seem to block this site from accessing my computer and uploading seemingly without any action from me huge amounts of data. I know this is not an infection, so I am wondering what I can do to block this from happening.

]]>https://forums.opera.com/topic/30675/mysterious-uploads-of-several-gbs-through-operaRSS for NodeSat, 17 Oct 2026 03:50:19 GMTSun, 27 Jan 2019 00:44:07 GMT60<![CDATA[Reply to Mysterious Uploads of Several GBs through Opera on Sun, 27 Jan 2019 11:18:03 GMT]]>@blackbird71

Other possibilities include a background page running in a speed dial or tab that has a website-code callout to the adnxs server, or an adware infection in your Opera installation. Fortunately (somewhat), adnxs is a major 'legitimate' ad server and not inherently malware of itself.

Most likely the website-code callout you mention. Probably also on one of my fav blogs. Needed to close that one tab and everything was good... I have been able to replicate the problem since so I am fairly certain now.

@leocg said in Mysterious Uploads of Several GBs through Opera:

How did you find out that it comes from Opera? And what about those addresses?

Glasswire

]]>https://forums.opera.com/post/163363https://forums.opera.com/post/163363Sun, 27 Jan 2019 11:18:03 GMT<![CDATA[Reply to Mysterious Uploads of Several GBs through Opera on Sun, 27 Jan 2019 05:04:28 GMT]]>@homeaccount said in Mysterious Uploads of Several GBs through Opera:

adnxs.com

This website will tell you what adnxs is (an adserver website): https://www.theguardian.com/technology/2012/apr/23/adnxs-tracking-trackers-cookies-web-monitoring

Try killing your browser extensions and see if the uploading stops. If it does, work through the extensions one at a time to figure out which one is causing it.

Other possibilities include a background page running in a speed dial or tab that has a website-code callout to the adnxs server, or an adware infection in your Opera installation. Fortunately (somewhat), adnxs is a major 'legitimate' ad server and not inherently malware of itself.

]]>https://forums.opera.com/post/163347https://forums.opera.com/post/163347Sun, 27 Jan 2019 05:04:28 GMT<![CDATA[Reply to Mysterious Uploads of Several GBs through Opera on Sun, 27 Jan 2019 05:03:29 GMT]]>How did you find out that it comes from Opera? And what about those addresses?

]]>https://forums.opera.com/post/163346https://forums.opera.com/post/163346Sun, 27 Jan 2019 05:03:29 GMT