iptables comment

[Sepport]

I want to prevent my DHCP-range IP devices from sending packages to the internet. Therefore I need to add following rule to the iptables:

iptables -I FORWARD -o eth0 -m iprange --src-range 192.168.100.140-192.168.100.160 -m comment --comment "DHCP range blocked" -j DROP

However, entering the above rule returns:
iptables: No chain/target/match by that name.

Apparently the problem is the comment that I want to add to the rule. The rule
iptables -I FORWARD -o eth0 -m iprange --src-range 192.168.100.140-192.168.100.160 -j DROP
works perfectly

How can I add a comment to this new rule when it is created.

My router is RT-AC5300 with Asuswrt-Merlin 380.69_2

 

[unsynaps]

I have tried this in the past. I do not think IPTABLES is compiled with the comment feature.

 

[Sepport]

I was afraid so. I wanted to use the rule's comment to check in a script if a certain rule was inserted in the iptables before, and to remove it if so.

Thanks for having replied.