I'm trying to allow connection to only one website (for only one domain). For example www.mywebsite.com, with IP address A.B.C.D.

My iptables definition looks like this:

iptables -I INPUT 1 -i lo -j ACCEPT

iptables -A OUTPUT -p udp --dport 53 -j ACCEPT

iptables -A OUTPUT -p tcp -d A.B.C.D --dport 80 -j ACCEPT

iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT

iptables -P INPUT DROP

iptables -P OUTPUT DROP

Problem is that it looks like subfolder of that website is not on the same server. So if it's on www.mywebsite.com, user must be able to access also to
www.mywebsite.com/cobiss/, www.mywebsite.com/cobiss?param1=value1&param2=value2.

Can you help me what additional rules I need to allow access to related parts of that site?