Some issues are easy to troubleshoot with the information presented by the proxy GUI. Issues with external services are more difficult to troubleshoot. External services that have an impact on how the proxy functions include:
DNS, Authentication, ICAP, and other.
This document will guide you through creating a custom snapshot to monitor these external services using the health check statistics.
The ProxySG includes 2 preconfigured snapshots but you can create custom snapshot to capture data on many different data points present on the proxy.
The following KB shows an example of creating a snapshot to monitor CPU statistics. This can be used as a guide when creating other snapshots.