> Source: [sk113159](https://support.checkpoint.com/results/sk/sk113159)

# sk113159 - database/signatures (APCL/URL, IPS, objects...) update fails when passing through proxy with NTLM authentication

| Property | Value |
|----------|-------|
| Solution ID | sk113159 |
| Date Created | 2016-08-31 |
| Last Modified | 2021-05-28 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Windows, Gaia |

## Symptoms

- * During manual database objects update, when passing through proxy with NTLM authentication, the attempt fails. ![](https://sc1.checkpoint.com/sc/SolutionsStatics/NEW_SK_NOID1472694285020/service_update_fail1608311853.PNG)

* Error message provided multiple possible causes.
* Manually running the command from cli:  
  `# curl_cli [--proxy IP_or_HostName:Port] -v -k https://updates.checkpoint.com -x `  
  provides the following output:   

  ```
  
  * About to connect() to proxy  (#0)
  *   Trying  (proxy IP)  (#0)
  * Establish HTTP proxy tunnel to updates.checkpoint.com:443
  < HTTP/1.1 407 Proxy Authentication Required
  
  < Proxy-Authenticate: NEGOTIATE
  
  < Proxy-Authenticate: NTLM
  < Proxy-Authenticate: BASIC realm=""
  < Cache-Control: no-cache
  < Pragma: no-cache
  < Content-Type: text/html; charset=utf-8
  < Proxy-Connection: close
  < Connection: close
  < Content-Length: 849
  
  * Ignore 849 bytes of response-body
  * Received HTTP code 407 from proxy after CONNECT
  * Closing connection #0
  curl: (56) Received HTTP code 407 from proxy after CONNECT
  ```

## Cause

The use of NTLM for the authentication method is currently not supported.

The reply of 'HTTP code 407' means - Proxy Authentication Required.

## Solution

This solution requires authentication. Please log in to view the full solution.

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