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CallBack Detectors Download Error

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An Error occurred while downloading CallBack Detector In McAfee NSM
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fkazi04 McAfee Employee
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Message 2 of 13

Re: CallBack Detectors Download Error

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Hi @User28126611 

Would you please confirm whether the deployment to the Sensor is failing or the NSM is unable to download Callback?

If NSM is unable to download, please ensure you have allowed URL: https://gti-api.mcafee.com.

If the deployment is failing on the Sensor, kindly wait for some time as the manager will retry the deployment. 

 

Regards,
Faizan

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fkazi04 McAfee Employee
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Message 2 of 13

Re: CallBack Detectors Download Error

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Hi @User28126611 

Would you please confirm whether the deployment to the Sensor is failing or the NSM is unable to download Callback?

If NSM is unable to download, please ensure you have allowed URL: https://gti-api.mcafee.com.

If the deployment is failing on the Sensor, kindly wait for some time as the manager will retry the deployment. 

 

Regards,
Faizan

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Re: CallBack Detectors Download Error

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The NSM is unable to download the Call back

tsrivast McAfee Employee
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Message 4 of 13

Re: CallBack Detectors Download Error

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These 2 URL's need to be allowed from NSM server, without  that callback download will not work

 

https://gti-api.mcafee.com
http://download.nai.com

 

 

Also if there is any SSL inspection / Url filtering is going on, please white-list the same 

 

Tarang 

Re: CallBack Detectors Download Error

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  • While analyzing it I’ve found that we get a http 502 error (Bad Gateway)
  • The connection is not blocked by the proxy
tsrivast McAfee Employee
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Message 6 of 13

Re: CallBack Detectors Download Error

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This is a server side error, means something wrong with the proxy server

The HyperText Transfer Protocol (HTTP) 502 Bad Gateway server error response code indicates that the server, while acting as a gateway or proxy, received an invalid response from the upstream server

 

If needed you can take the pcaps on the proxy level. 

Also if needed you can bypass the proxy to check the results.

 

This is a connectivity issue 

 

Re: CallBack Detectors Download Error

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Attached the PCAP,

fkazi04 McAfee Employee
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Message 8 of 13

Re: CallBack Detectors Download Error

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Hi @User28126611 

From the snapshot attached, I understand the connection to download.nai.com is not successful via McAfee Web Gateway 7.6. To isolate proxy as an issue, remove the proxy from the NSM Manager (server) & NSM Application and check for callback detector. 

 

You may please reach out to the WebGateway team for any further assistance.

 

I hope this answers your question.

Regards,
Faizan

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Re: CallBack Detectors Download Error

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Dear, 

We have removed the proxy from the NSM Manager, but still the same issue.

 

Regards,

Syed Usamuddin

fkazi04 McAfee Employee
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Message 10 of 13

Re: CallBack Detectors Download Error

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Hi Syed,

We require to check the info-collector logs of the NSM to confirm the exact cause of the issue. Please raise a service request with the Support team and they should be able to assist you.

 

Regards,
Faizan

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