Powershell script for Azure WebApp Firewall - azure

Question

I have a script that removes and then adds firewall restrictions on Azure WebApp before doing a deployment. Below you will find the script
az webapp config access-restriction remove -g $(qa-rg) -n $(qa-app) --rule-name myip --action Allow --ip-address 157.71.103.203/32 --priority 1011
az webapp config access-restriction remove -g $(qa-rg) -n $(qa-app) --rule-name myip --action Allow --ip-address 157.71.173.703/32 --priority 1012
az webapp config access-restriction add -g $(qa-rg) -n $(qa-app) --rule-name myip --action Allow --ip-address 157.71.103.203/32 --priority 1011
az webapp config access-restriction add -g $(qa-rg) -n $(qa-app) --rule-name myip --action Allow --ip-address 157.71.173.703/32 --priority 1012
The issue with the above command is that, suppose someone has manually removed the firewall or the firewall does not exist for that user, then the script fails with an error in this case.
Is there a way to first check all the firewalls enabled for different users, then traverse and remove each of them and then finally again add all the firewall rules for the removed users.
Can someone please help me create this script as I am just learning scripting
Thanks

Answer 1

Firstly, you are using Azure CLI command rather than Power Shell command.
Here is the command for removing access restriction rule using power shell:
Remove-AzWebAppAccessRestrictionRule -ResourceGroupName "Default-Web-WestUS" -WebAppName "ContosoSite" -Name IpRule
For checking the rule exist or not, you could use Get-AzWebAppAccessRestrictionConfig.
If you want check and remove automatically, try this:
$results = (Get-AzWebAppAccessRestrictionConfig -ResourceGroupName "ResourceGroup" -Name "yourweb").MainSiteAccessRestrictions
$results
foreach($result in $results)
{
if($result){
Remove-AzWebAppAccessRestrictionRule -ResourceGroupName "ResourceGroup" -WebAppName "yourweb" -Name $result.RuleName
sleep 10
}
}