What will the value of this string be if curl fails due to e.g. no network connection?

Can we avoid calling aws ec2 describe-security-groups twice?

(Not sure if my suggestion actually works)

# Get the current public IP address
ip_address=$(curl -s ipv4.wtfismyip.com/text)

# Check if the IP address was retrieved successfully
if [ -z "$ip_address" ]; then
  echo "Failed to retrieve IP address. Exiting."
  return 1
fi

wonder if we should do something like this before we call authorize-security-group-ingress

bartek's suggestion makes sense to me and i think it should work

In that case it would be (6) Could not resolve host: ipv4.wtfismyip.com and the command would fail with a faulty cidr.

Just tested this and it works. Will include in the next rebase

This suggestion works. Including in next rebase

Didn't we want to be consistent about [ vs [[?