Upload Failed: Curl Error: Ssl Connect Error.

What if your coil requests cannot connect your Website using SSL, isn't information technology frustrating?

Usually, PHP cURL SSL connect mistake 35 occur due to version mismatch or outdated cURL package.

At Bobcares, we often get requests to fix SSL whorl errors, equally a part of our Server Management Services.

Today, let's see how our Back up Engineers fix PHP ringlet SSL connect mistake 35 for our customers.

What is PHP roll SSL connect fault 35?

Before getting deeper into the fault, firstly let'due south understand what is PHP curl.

cURL stands for Client for URL. Usually, PHP uses cURL to connect to the specified website URL. Here we are discussing cURL request to an SSL website.

In many situations, when a server tries to connect to an SSL website, the cURL request ends up in an fault message.

          cURL mistake (35): SSL connect error.        

The error bulletin denotes that there is an mistake somewhere in SSL/TLS handshake. In brusque, the cURL error code 35 denotes an SSL connection error.

The error can be due to an outdated curlicue bundle, connection errors or else a version mismatch between the PHP gyre and SSL protocol of the cease server.

A sample error at a Drupal website will prove up every bit:

How nosotros gear up the PHP scroll SSL connect error?

Then far, nosotros have seen what is PHP cURL SSL connect mistake. Our Dedicated Engineers with expertise over a decade usually prepare this fault for our customers.

As the first step of troubleshooting, we check the webserver log.

Information technology gives a detailed summary of all the SSL/TLS handshakes. From this information, our experts find the exact reason for the timeout.

1. SSL protocol of destination site

In about cases, errors will exist with the PHP curl versions in the server.

For instance, the command-line cURL may be using the latest version and the SSL protocol may be outdated.

Meanwhile, if the server tries to connect to an endpoint with an older SSL protocol, it fails and ends upwardly in cURL error 35. This is particularly applicable with outdated SSL protorcols similar SSLv2, SSLv3.

So, we check the versions of the cURL and SSL protocol. Later, if at that place is any version mismatch, our Support Engineers update it to the latest.

2. Outdated curlicue parcel

Similarly, an outdated cURL package in the servers shows up the SSL connect fault. In this case, our Support Engineers check the gyre version in the server.

          rpm -qa | grep curl        

This command gives the currently used cURL version in the server.

Subsequently, we update the cURL package to the latest version. After that, we update the Network Security Services (NSS) package on the server using:

          yum update -y nss        

This fixes the parcel and the mistake does not bear witness upward again.

iii. Customizing coil configuration

Some customers customize the cURL settings on the server. However, improper setting of the PHP cURL configuration file leads to error 35.

In such cases, our Back up Team check the configuration file and correct it.

Here, we kickoff confirm the availability of whorl module back up for PHP with the command:

          php -i | grep -i curl        

For example, the correct settings announced as:

          /etc/php.d/curl.ini, ringlet roll support => enabled curl Information => vii.66.0        

We also ensure that the website uses the correct PHP version with cURL support.

4. Firewall restrictions

In many cases, the curl SSL fault can happen due to firewall restrictions on the server too. For case, when network administrators ban SSL connections, none of the information transactions to or from the server happens.

Thus, we always check the firewall on the server and ensure that the server accepts SSL port connections from selected APIs and networks.

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Decision

In short, PHP cURL SSL connect error 35 normally occur due to version mismatch of cURL and SSL, outdated cURL package, firewall restrictions then on. Today, we also saw how our Support Engineers fix this error for our customers.

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Source: https://bobcares.com/blog/php-curl-ssl-connect-error-35/

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