What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general.

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
More than 500,000 users rely on Paessler PRTG every day. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags


View all Tags

SSL Certificate Sensor error: Failed to establish secure connection [Step 0] Socket Error # 11001 Ho

Votes:

0

Hi I've been setting up some SSL Certificates sensors for mutliple servers, on a few on them I've gotten the following error response. 

Failed to establish secure connection 
[Step 0] Socket Error # 11001 Host not found. 
[Step 1] Socket Error # 11001 Host not found. 
[Step 2] Socket Error # 11001 Host not found. 
[Step 3] Socket Error # 11001 Host not found. 
[Step 4] Socket Error # 11001 Host not found. 
[Step 5] Socket Error # 11001 Host not found.

I've tried searching around but I haven't been able to find an answer for this. Is it possible that PRTG is being blocked by these servers firewalls?

prtg prtg-network-monitor ssl-certificate

Created on Nov 3, 2017 10:29:17 AM

Last change on Nov 3, 2017 12:41:24 PM by Stephan Linke [Paessler Support]



5 Replies

Votes:

0

Hi there,

Is the site available when opening it in a browser on the PRTG server? No typos in the device address?

Kind regards,
Stephan Linke, Tech Support Team

Created on Nov 3, 2017 12:42:24 PM by Stephan Linke [Paessler Support]



Votes:

0

Yes all sites are available when trying to access them via Internet Explorer, No there isn't any typo's in the device address's

Created on Nov 3, 2017 2:31:24 PM



Votes:

0

Hi there,

Are the pages available publicly so I could test them within my local installation?

Kind regards,
Stephan Linke, Tech Support Team

Created on Nov 6, 2017 5:11:53 AM by Stephan Linke [Paessler Support]



Votes:

0

Yes the pages are available:

  1. https://mcia-crm.co.uk
  2. https://booking.bikesafe.co.uk/
  3. https://aircraftit.com/MRO/Index.aspx
  4. https://aircraftit.com/

Created on Nov 6, 2017 8:46:54 AM

Last change on Nov 6, 2017 8:52:36 AM by Stephan Linke [Paessler Support]



Votes:

0

Well, they're working for me, although only support SSL up to v3.

Are you using a proxy within your network by any chance that is not yet configured in PRTG under Setup | System Administration | Core & Probes | Proxy Configuration? Note that the proxy might be configured via GPO and not be visible in the IE settings in case you checked that already.

Kind regards,
Stephan Linke, Tech Support Team

Created on Nov 7, 2017 10:02:16 AM by Stephan Linke [Paessler Support]




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.