Magento – PayPal IPN 503 Error

magento-1.9paypal-standard

For the last 8 days I've not been getting any order information from PayPal when a customer purchases something.

I've checked my IPN settings in my PayPal account and in the history log it shows:

HTTP response code 503

Delivery status Failed

My notification URL is https://example.com/paypal/ipn/

I've also tried it without https and with the www

I'm using PayPal Website Payments Standard. There's no errors in my logs and no paypal log (as the request obviously isn't reaching Magento.

I've whitelisted the PayPal domain on the server firewall.

I've upgraded Magento from 1.9.2.3 to 1.9.2.4 but that hasn't helped either.

When I check the URL with a server header checker I get a 200 response.

PHP Version 5.3.23

How else can I debug what's going on?

Best Answer

Might be related to recent PayPal SSL certificate upgrade.

PayPal is in the process of upgrading the SSL certificates used to secure our web sites and API endpoints. These new certificates will be signed using the SHA-256 algorithm and VeriSign’s 2048-bit G5 Root Certificate. You will need to ensure that your environment supports the use of the SHA-256 signing algorithm and discontinue the use of SSL connections that rely on the VeriSign G2 Root Certificate. This action must be taken by June 17, 2016 in order to avoid any disruption of service.

Additional information in links below:

SSL Certificate Upgrade Microsite

Related Solutions

Magento 1.9 – Latest PayPal Upgrade Notification

I got this too. You're probably looking at this blog article, right? https://devblog.paypal.com/paypal-ssl-certificate-changes/

The translation is that they're going to use SSL certificates which have stronger encryption on them. All you need to do is make sure your server supports it. Which means - ask your hosting provider.

You actually shouldn't have to do anything in Magento itself. This is all server-level material. Magento itself doesn't actually do the encryption/decryption, it makes a call to the server which handles that.

To be 100% certain, call your hosting provider about this. Tell them that you got this email about paypal upgrading their SSL certs to SHA-256, and you want to make sure your server supports it.

Most likely, they'll tell you they upgraded months ago.

Magento 1.8 PayPal IPN – Fixing 500 Error in Notifications

Finally I found the solution after reviewing in deep. This was cause to due "USER Agent" HTTP Header in request. You can update this on Ipn.php file. Just replace the below line from this function on app/code/core/Mage/Paypal/Model/Ipn.php (Don't apply on core file. Add it on local dir)

protected function _postBack(Zend_Http_Client_Adapter_Interface $httpAdapter)

at line 143 (in magento 1.8.1)

$httpAdapter->write(Zend_Http_Client::POST, $this->_config->getPaypalUrl(), '1.1', array(
                'Connection: close',
            ), $sReq);

replace with

$httpAdapter->write(Zend_Http_Client::POST, $this->_config->getPaypalUrl(), '1.1', array(
                'Connection: Close', 'User-Agent: your_company_name'
                ), $sReq);

Best Answer

Related Solutions

Magento 1.9 – Latest PayPal Upgrade Notification

Magento 1.8 PayPal IPN – Fixing 500 Error in Notifications

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