preg_match(): No ending delimiter '/' found Laravel

I'm doing a validation by regex from a request, this validation is to check that the parameter that is sent is an IP.

My rules are as follows:

  <?php

namespace App\Http\Requests\usuarios;

use Illuminate\Foundation\Http\FormRequest;

class storeVPN extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return [            
            'segmentwan' => 'http://regex:/^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$/',
            'segmentlan' => 'http://regex:/^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$/',

        ];
    }

the debugger shows me that the error is in this line

the debugger shows me that the error is in this line

return preg_match($parameters[0], $value) > 0;

y el error completo es el siguiente

 * @return bool
     */
    public function validateRegex($attribute, $value, $parameters)
    {
        if (! is_string($value) && ! is_numeric($value)) {
            return false;
        }

        $this->requireParameterCount(1, $parameters, 'regex');

        return preg_match($parameters[0], $value) > 0;
    }

    /**
     * Validate that a required attribute exists.
     *
     * @param  string  $attribute
     * @param  mixed   $value
     * @return bool
     */
    public function validateRequired($attribute, $value)
    {
        if (is_null($value)) {
            return false;
        } elseif (is_string($value) && trim($value) === '') {
            return false;
        } elseif ((is_array($value) || $value instanceof Countable) && count($value) < 1) {
            return false;
        } elseif ($value instanceof File) {
            return (string) $value->getPath() !== '';
        }

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