[legolas]

Hello
I have some IP cams and a NVR, and I want to record the video only at night, but the schedule configuration doesn't work on NVR, so how I can block a port to block inbound traffic to NVR?
Tried many configurations and the block does not work
iptables -I FORWARD -d nvr.ip -p tcp --dport 554 -j DROP
iptables -I FORWARD -s cam.ip -p tcp --dport 554 -j DROP

The NVR is on router lan port and the router is connected to another router with repeater bridge
Firmware: DD-WRT v3.0-r38253 std (01/10/19)

Thank you!

[eibgrad]

Blocking via the router only works when the traffic between two devices is being routed. But devices that share the same ethernet segment, and by extension, the same IP network, do NOT route. They are bridged and communicate directly w/ each other. The router's firewall never comes into play. In order for the NVR to prevent access, it would need its own personal IP firewall.