Carlos E. R. wrote:
On a known machine : iptables -I INPUT -p all -s 192.168.34.0/24 -j ACCEPT iptables -I INPUT -p all -s 192.168.101.0/24 -j DROP
All that is very nice, but I do need new hardware to assign 192.168.101.0/24 to guests. Currently I have no way to do that.
I thought you said your router supported allocating fixed addresses, up to 30 ?
For most common home routers I have seen, the guest configuration is only about giving guests a different SSID and password than the main one. They get IPs from the same pool as the household.
That is fine - assign fixed addresses to the household machines. Disclaimer: not a ready-to-go solution, just for inspiration. The rest is up to the reader. Might require some reading. -- Per Jessen, Zürich (16.1°C) Member, openSUSE Heroes (2016 - present) We're hiring - https://en.opensuse.org/openSUSE:Heroes