ProxySG is still doing IPv6 DNS query even after restricting to IPv4 only

Solution

Overview

The ProxySG still performs IPv6 DNS query and negates the IPv4 policy similar to the following:

<Forward>
    server_url.dns_lookup (ipv4-only)

<Proxy>
    server_url.dns_lookup (ipv4-only)

 

Cause
Resolution
  1. In the Visual Policy Manager (VPM), navigate to Configuration > Set DNS Lookup Restrictions.
  2. Check "All" for DNS lookup restrictions and install the policy.
    This will disable the proxy from performing DNS forward lookups for policy evaluation purposes.
  3. If you want to restrict only a particular URL or domain, check "Listed host patterns".
  4. Click "Add" to add the URL or domain name.

 

Workaround
Additional Information
Bug Number
InQuira Doc IdKB4236
Attachment

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