@crispyoz Thank you very much for your message. It is more clear now after also checking again and again the small details of GPL. Thanks again!

@crispyoz @Lazar-Demin
Apparently, it is also discused in openWRT forum, but I still would like to see you comments on my questions if possible for you.
https://forum.openwrt.org/t/license-compliance/35479/3

@Lazar-Demin @crispyoz Thank you very much! But I am a bit confused. I have also checked the GPLv2 license to get a bit more familiar as you already suggested.
My understanding is, if we are developing a software based on stack whose license is GPLv2 license (openWRT in this case), then we must publish it to somewhere which means it mush be open-source and publicly accessible.

But @crispyoz Your last post makes me a bit confused. You mentioned you have closed product because you did not change anything in openWRT.
Actually my plan is developing a closed product based on onion 2s+. But I am planning to disable ssh and also I will change the web interface which is used to configure the device.
To disable ssh and also o remove non-used modules, I am planning to rebuild the sources of onion omega. But sources are also based on openWRT.
In this case, what is my responsbility to onion.io & openWRT?
Should I make my new image publicly accessible?

Another question, I can also disable ssh and uhttpd in application. Then It will be a kind of application code. So, I guess I will not in change of publishing anything, correct?
Thanks again for details.

Not fully related to this topic but

1. Can I develop a closed product with your module by doing a few customizations in your firmware? e.g. domain, name / http server / and also some default applications in the customized firmware.

2. If yes, Should I follow any license of you? Any mark on the product regarding onion or any visualization on the user manual or http server about that I am powered by onion and/or openwrt etc?

3. If all is OK then what is your plan for the duration of availability? 2 years later, will still be producing this module?

Thanks,