

I think wallabag is the self-hosted go-to for this, but I’m not sure of the extensions for it.
I used to use pocket because it allowed me to sync to my Kobo reader. Kobo have struck a deal with Instapaper and it works in a similar way.
The official instapaper plugin doesn’t do what In My Pocket does, unfortunately.

We would need more info to help confirm, but watching ids traffic will show you lots of misconfigurations as well as actually suspicious traffic, so this might be a POS device doing stupid stuff.
Is suricata listening on an internal subnet interface? If you are listening on a public interface, your job sorting through the trash traffic will be difficult because determining source is nearly pointless and your external interface should not know anything about the internal subnet.