L&LD
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@Movisman, yes, the defaults are where you should start. But I wouldn't be in test mode extensively just at those defaults (some are just wrong).
The following links may be useful to you getting started out.
The 'defaults', are only really default, only after flashing the firmware you want to use and then following the WPS Button reset method for your router as outlined in the link below (at a minimum... sometimes, it is beneficial to do multiple resets and different kinds of resets too, WPS Button, Reset Button and via the GUI, for example, to fully reset a specific unit. If you intend to run RMerlin firmware, flash it right away and do your testing with it from the start. Short of a (suspected) hardware failure, I don't believe there is anything useful to be gained by testing 'stock' firmware for any length of time first. You don't learn to ride a bike by eating Cheezies.
[Wireless] ASUS router Hard Factory Reset | Official Support | ASUS Global
Follow the link below to what are best practices collected from these forums and what are what I consider the 'real' defaults, at least to begin your testing with. Along with a full reset, this puts the router into a good/known state.
Fully Reset / Best Practice Setup / More
Also, note that there are a few (many?) options that don't get turned off fully when you toggle them on/off. Leaving an option alone may not be the same thing as toggling it on, then off again. While you can search on how to actually disable that function you tested, it is faster to simply do a full reset again (at least while you're in testing mode). And, you'll have the confidence to know after that full reset that you didn't mess with any other such 'sticky' toggles within the menu too.
The following links may also be useful to you too.
Almost all L&LD Links
About L&LD
The following links may be useful to you getting started out.
The 'defaults', are only really default, only after flashing the firmware you want to use and then following the WPS Button reset method for your router as outlined in the link below (at a minimum... sometimes, it is beneficial to do multiple resets and different kinds of resets too, WPS Button, Reset Button and via the GUI, for example, to fully reset a specific unit. If you intend to run RMerlin firmware, flash it right away and do your testing with it from the start. Short of a (suspected) hardware failure, I don't believe there is anything useful to be gained by testing 'stock' firmware for any length of time first. You don't learn to ride a bike by eating Cheezies.
[Wireless] ASUS router Hard Factory Reset | Official Support | ASUS Global
Follow the link below to what are best practices collected from these forums and what are what I consider the 'real' defaults, at least to begin your testing with. Along with a full reset, this puts the router into a good/known state.
Fully Reset / Best Practice Setup / More
Also, note that there are a few (many?) options that don't get turned off fully when you toggle them on/off. Leaving an option alone may not be the same thing as toggling it on, then off again. While you can search on how to actually disable that function you tested, it is faster to simply do a full reset again (at least while you're in testing mode). And, you'll have the confidence to know after that full reset that you didn't mess with any other such 'sticky' toggles within the menu too.
The following links may also be useful to you too.
Almost all L&LD Links
About L&LD