Originally published at: http://www.howtogeek.com/180987/5-things-you-need-to-do-immediately-after-plugging-in-your-new-router/
Routers are such an infrequently replaced component of your home network that it’s easy to forget how you had things previously configured and what settings are too important to not overlook. Read on as we highlight the first five things you need to do right after powering up your new router.
And the sixth things is ... disable UPnP (as your first related article suggests).
UPnP is a security risk (even if it works as designed) and should normally be disabled. UPnP lets other network equipment change your router settings.
However, the UPnP protocol contains numerous programming flaws that make it impossible to guarantee it will work as designed. See http://www.zdnet.com/millions-of-pcs-exposed-through-network-bugs-security-researchers-find-7000010478/
The message is clear: disable UPnP!
I agree with another step in the first related article: Change the router's default IP address. I always take the additional step of changing the router's default subnet from the typical 192.168.0.x to a random number like 192.168.143.x.
Another security step that I take, yet seldom see mentioned in articles, is to change the router's Device Name. Very often, the manufacturer defaults the device name to the model number, giving someone similar information about the router as the default SSID.
And disabling WPS (Wi-Fi Protected Setup) can also be usefull. If someone really wants to break into your network, they can bruteforce it quite easily (according to this Wikipedia article)...
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