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Virgin Media Warns UK Broadband Users Not to Switch Routers Off at Night - ISPreview UK
(www.ispreview.co.uk)
This is a most excellent place for technology news and articles.
Read the title and went: What? They want you to keep your network hardware ON, when unattended, to increase the undetected malware entry opportunities?
Turns out it as their own devices they wanted to push updates to.
I would really prefer to use my own device though and even better, configure it myself after learning how the ISP's network works. But convenience is what it is.
The malware argument is a bit weak, if your router is vulnerable to something it'll likely be found and pwnd in a matter of minutes, so turning it off a night won't really save you. And once a patch is released, it'll be reverse engineered in a few hours/days, so ideally you want patches as soon as they are released.
Using your own device is usually a good idea anyway, telco stuff is usually pretty mediocre. And as soon as your device is slightly custom, it becomes a less valuable target.
It's much more than just a bit weak, unless you are somehow continuously monitoring it, so yeah, in most end-user scenarios, it would hardly make a difference to keep it on, even if there were no updates.