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

Error sending "SMS": Number=8801737xxxxxx, Message=HTTP/1.1 403 Forbidden



I have added a custom url to send sms to my client.

I have added only ping sensor for a host. When the host getting down/up, then it trigger to send sms but am getting an error message in log. Log is given below.

"Error sending "SMS": Number=8801737xxxxxx, Message=HTTP/1.1 403 Forbidden (Sensor/Source/ID: 2120/2119/1)"

403-forbidden error http-1-1 sensors sms-notification

Created on Oct 29, 2018 4:58:57 AM

Last change on Oct 29, 2018 9:58:28 AM by  Luciano Lingnau [Paessler]

1 Reply



Hello there,

The error "403" indicates that you need to submit credentials to make the SMS-Call. Please check those.

Kind regards,
Birk Guttmann, Tech Support Team

Created on Oct 31, 2018 9:41:01 AM by  Birk Guttmann [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.