How do i redirect clients to a page on the network

Hi All
i want to redirect my clients to a page either than the net if they are due to pay their monthly bills.
How do i do this without the client having internet access

with a nat rule. dst-nat with action dst-nat:

/ip firewall nat add chain=dstnat src-address=1.1.1.1 action=dst-nat to-addresses=192.168.0.109

assuming 1.1.1.1 is the bad client, and 192.168.0.109 is your webserver

… and bad client cannot be in the same IP subnet as local web server where he is redirected to.

do i put this firewall command in the client’s radio or the base station

base station

ok i will do that and get back to you

can i use ip pool instead od certain ip address?
i’d like to change ip pools in user manager via some php script.
or is there better way do do that ?