Since I updated to PRTG 12 the PRTG web interface is not available any more. When calling the existing URL, I suddenly see an error message
Http/1.1 Service Unavailable
I try to access the PRTG web server through NetScaler. What can I do?
How can I access PRTG through Citrix NetScaler?
Modified on 2025-06-10 14:42:23 +0200
Disclaimer:
The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.
The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.
This article applies to PRTG Network Monitor 9.2 or later
Configure PRTG for NetScaler
With one of the latest PRTG 9 releases we made the PRTG web server more secure, so it does not allow SSLv2 connections any more. Citrix NetScaler seems to be incompatible with this setting.
There is a registry setting to force PRTG to use the old behavior again, allowing SSL v2 connections. In order to access your PRTG web server through Citrix NetScaler, please apply this setting.
For details, please see Allow SSL v2 Connections for PRTG.
Sep, 2012 - Permalink