Make Bitwarden reachable only from one IP

Good day,
How is it possible to make Bitwarden reachable only from one IP.
I’ve entered IP tabeles, but these are ignored.

sudo iptables -A INPUT -p tcp --dport 80 -j DROP
sudo iptables -A INPUT -p udp --dport 80 -j DROP
sudo iptables -A INPUT -p tcp --dport 443 -j DROP
sudo iptables -A INPUT -p udp --dport 443 -j DROP
sudo iptables -A INPUT -p tcp -s 0.0.0.0 --dport 80 -j ACCEPT
sudo iptables -A INPUT -p udp -s 0.0.0.0 --dport 80 -j ACCEPT
sudo iptables -A INPUT -p tcp -s 0.0.0.0 --dport 443 -j ACCEPT
sudo iptables -A INPUT -p udp -s 0.0.0.0 --dport 443 -j ACCEPT

Hello,

Now, I am not fluent in the iptables language but shouldn’t you first specify what IPs that are accepted and then drop everything else? To me it looks like you are dropping everything and then the accept rules are never reached. But, what do I know…?!

/Anders