• Skip to main content

Uly.me

cloud engineer

  • Home
  • About
  • Archives

validation

AWS Request Domain Renewal

September 17, 2021

Occassionally, AWS requires validation of your domain via email message. Here’s the command to send a request.

aws acm resend-validation-email \
--certificate-arn arn:aws:acm:us-east-1:xxxxxxxxxxxx:certificate/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx \
--domain yourdomain.com \
--validation-domain yourdomain.com
 
aws acm resend-validation-email \
--certificate-arn arn:aws:acm:us-east-1:xxxxxxxxxxxx:certificate/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx \
--domain www.yourdomain.com \
--validation-domain yourdomain.com

aws acm resend-validation-email \ --certificate-arn arn:aws:acm:us-east-1:xxxxxxxxxxxx:certificate/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx \ --domain yourdomain.com \ --validation-domain yourdomain.com aws acm resend-validation-email \ --certificate-arn arn:aws:acm:us-east-1:xxxxxxxxxxxx:certificate/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx \ --domain www.yourdomain.com \ --validation-domain yourdomain.com

You will need acm:ResendValidationEmail permission to run the command.

Filed Under: Cloud Tagged With: acm, awscli, certificate, renewal, validation

Validating IP Addresses

January 31, 2014

If you have a form that accepts IP addresses, you might want to validate it to make sure it really is a valid IP address. I’m talking about IPv4 since IPv6 is not yet universally implemented. A valid IPv4 IP addresses should fall between the numbers 0.0.0.0 and 255.255.255.255. In this example, we will use a regular expression and a pattern matching function in PHP to see if it’s a real IP address.

First things first, we need to sanitize the input. We can use the following PHP functions. We will assign the sanitized input to a variable.

// sanitize input from form
$ip_address = addslashes(htmlspecialchars(strip_tags(trim($_POST['ip_address']))));

// sanitize input from form $ip_address = addslashes(htmlspecialchars(strip_tags(trim($_POST['ip_address']))));

This is the regular expression that we will use that accepts valid IP addresses.

// the regular expression for valid ip addresses
$reg_ex = '/^((?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))*$/';

// the regular expression for valid ip addresses $reg_ex = '/^((?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))*$/';

We will now compare the two variables: $reg_ex and $ip_address to see if IP address passes the test.

// test input against the regular expression
if (preg_match($reg_ex, $ip_address)) { 
   return TRUE; // it's a valid ip address
}

// test input against the regular expression if (preg_match($reg_ex, $ip_address)) { return TRUE; // it's a valid ip address }

We will now place everything in a tidy function so we can use it anytime we want.

function validate_ip_address($ip_address) {
 
  // sanitized ip address
  $clean_ip_address = addslashes(htmlspecialchars(strip_tags(trim($ip_address))));
 
  // the regular expression for valid ip addresses
  $reg_ex = '/^((?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))*$/';
 
  // test input against the regular expression
  if (preg_match($reg_ex, $clean_ip_address)) { 
    return TRUE; // it's a valid ip address
  }
 
}

function validate_ip_address($ip_address) { // sanitized ip address $clean_ip_address = addslashes(htmlspecialchars(strip_tags(trim($ip_address)))); // the regular expression for valid ip addresses $reg_ex = '/^((?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))*$/'; // test input against the regular expression if (preg_match($reg_ex, $clean_ip_address)) { return TRUE; // it's a valid ip address } }

Finally, it’s time to call our function.

$ip_address = $_POST['ip_address'];
 
if (validate_ip_address($ip_address)) {
  echo "It's a valid IP address!";
}

$ip_address = $_POST['ip_address']; if (validate_ip_address($ip_address)) { echo "It's a valid IP address!"; }

Filed Under: PHP Tagged With: ip address, preg_match, regular expression, validation

  • Home
  • About
  • Archives

Copyright © 2023