title: Allow HTTPS connection to payseal.icicibank.com on port 443
body: <p>I have a java application and I am integrating ICICI payment gateway to the my java application.</p>
  
  <p>To integrate I have to allow HTTPS connection to payseal.icicibank.com on port 443.</p>
  
  <p>How can I do this on linux server?</p>
  
  <p>On my windows machine I have successfully integrated the gateway without configuring port 443 but on linux server I am finding some difficulties. I am getting the error</p>
  
  <pre><code>Error encountered. Error Code : 2 . Message Error while writing data. Transaction cannot be processed 
  </code></pre>
  
  <p>How can I check that my linux server is allowing HTTPS connection to payseal.icicibank.com on port 443?</p>
  
  <p>Thanks</p>