Simple bash script to update a Security Group matched by description and port in AWS with your Public IP

updateAWSecurityGroup.bash

#! /bin/bash

publicIP=`dig +short myip.opendns.com @resolver1.opendns.com`

securityGroupIds="sg-stuffstuff"
ruleDescription="This is the string we're using to find our rule"

## Consult previous one
awsOutput=`aws ec2 describe-security-groups --group-ids $securityGroupIds`
ipRangeIndex=`echo $awsOutput | gron | grep $ruleDescription | sed "s/.\+IpRanges\[\([0-9]\+\)\].\+/\1/"`
cidrIP=`echo $awsOutput | gron | grep "IpRanges\[$ipRangeIndex\].CidrIp" | sed "s/.\+ \= \"\(.\+\)\";/\1/"`

## Delete the previous one
if [ -n "${cidrIP}" ]; then
  aws ec2 revoke-security-group-ingress --group-id $securityGroupIds --ip-permissions '[{"IpProtocol": "tcp", "FromPort": 80, "ToPort": 80, "IpRanges": [{"CidrIp":"'$cidrIP'"}]}]'
fi

## Add the new one
aws ec2 authorize-security-group-ingress --group-id $securityGroupIds --ip-permissions '[{"IpProtocol": "tcp", "FromPort": 80, "ToPort": 80, "IpRanges": [{"CidrIp": "'$publicIP'/32", "Description": "'$ruleDescription'"}]}]'

do you have a version that works without gron ?

do you have a version that works without gron ?

No, this is the only version I have, sorry.