Open access to port 80 for a specific IP address through Iptables?

Question

iptables

Good evening, tell me the rule for iptables to open access to port 80 from a specific ip with a mask, for example 192.168.0.0/24

Answer 1

iptables -I INPUT -m tcp -p tcp --dport 80 -s 192.168.0.0/24  --comment "ALLOW LAN 80/tcp"  -j ACCEPT

But the /24 mask is not one, but 254 addresses. If you need one, then specify it, it will have a mask / 32 (it is possible without it in this case).