Sign In with your
Trend Micro Account
Need Help?
Need More Help?

Create a technical support case if you need further support.

"A connection to the View Server could not be established…" appears when doing HTTPS decryption in IWSVA

    • Updated:
    • 9 Oct 2015
    • Product/Version:
    • InterScan Web Security Virtual Appliance 5.6
    • InterScan Web Security Virtual Appliance 6.0
    • InterScan Web Security Virtual Appliance 6.5
    • Platform:
    • Linux - Red Hat RHEL 5 64-bit
    • N/A N/A
Summary

InterScan Web Security Virtual Appliance (IWSVA) is configured in forward proxy mode. However, users cannot access certain HTTPS URLs when user/group (LDAP) name authentication is enabled. The following error message appears:

"A connection to the View Server https://view.domain.com/ could not be established. Could not connect through proxy settings."

When using IP authentication, the website comes up without any issue.

Details
Public

This issue occurs because UserID Caching is disabled. This causes some packets to be dropped due to LDAP AD communication timeouts. By default, UserID Caching is disabled in IWSVA.

To address this issue, enable UserID Caching using the steps below:

  1. Look for and open the intscan.ini file using a text editor.
  2. Look for the following parameter and change its value to "yes" to enable cache.

    enable_ip_user_cache

     
  3. Save and close the intscan.ini file.
  4. Execute the following commands to restart the HTTP daemon:

    #/etc/iscan/S99ISproxy stop
    #/etc/iscan/S99ISproxy start

If you do not want to enable UserID Caching, you can add the URL(s) to the Global Trusted List to bypass the LDAP authentication when accessing the site. To do this:

  1. Log in to the IWSVA web console.
  2. Go to HTTP > URL Access Control > Global Trusted URLs
  3. Select the Enable Trusted URLs checkbox.
  4. Type in the following in the Match field:

    http://www.domain.com/

  5. Click Trust to add the URL to the list.
  6. Click Save for the changes to take effect.
Premium
Internal
Rating:
Category:
Troubleshoot
Solution Id:
1056205
Feedback
Did this article help you?

Thank you for your feedback!

To help us improve the quality of this article, please leave your email here so we can clarify further your feedback, if neccessary:
We will not send you spam or share your email address.

*This form is automated system. General questions, technical, sales, and product-related issues submitted through this form will not be answered.

If you need additional help, you may try to contact the support team. Contact Support


To help us improve the quality of this article, please leave your email here so we can clarify further your feedback, if neccessary:
We will not send you spam or share your email address.

*This form is automated system. General questions, technical, sales, and product-related issues submitted through this form will not be answered.


Need More Help?

Create a technical support case if you need further support.