My website https://www.pinbargain.com is hosted on LightSail received some suspicious IP addresses, therefore, I followed this document https://docs.bitnami.com/aws/faq/configuration/block-suspicious-ip/ to block some suspicious IP address I use this command to block the IP address:
iptables -A INPUT -s 1.2.3.4 -j DROP
Now the problem is I accidentally blocked IP address from my Internal service. Therefore, I want to find the IP address I blocked and unlock them.
I have searched on docs.bitnami.com but I couldn't find the command to unblock.
I took a closer look at the article you sent (https://docs.bitnami.com/aws/faq/configuration/block-suspicious-ip/).
At the bottom, it says how to delete a rule (aka how to unblock an IP).
Basically, you would run this command (replace 1.2.3.4 with the IP):
iptables -D INPUT -s 1.2.3.4 -j DROP
I also found out how to see a list of blocked IPs by looking at the help menu:
iptables --list-rules
Also, don't forget to reboot.