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Manual Chapter : Using Via Headers to Acquire Information About Intermediate Routers

Applies To:

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BIG-IP APM

  • 17.0.0

BIG-IP Link Controller

  • 17.0.0

BIG-IP Analytics

  • 17.0.0

BIG-IP LTM

  • 17.0.0

BIG-IP PEM

  • 17.0.0

BIG-IP AFM

  • 17.0.0

BIG-IP DNS

  • 17.0.0

BIG-IP ASM

  • 17.0.0
Manual Chapter

Using Via Headers to Acquire Information About Intermediate Routers

Overview: Using Via headers

Via headers provide useful information about intermediate routers that can be used in network analysis and troubleshooting.

Task summary for identifying intermediate information with Via headers

Perform these tasks to identify intermediate information with Via headers.

Identifying information about intermediate proxies with Via headers

The BIG-IP system can include Via headers (configured in an HTTP profile) in a request, a response, or both, to identify information, such as protocols and names, for intermediate proxies that forward messages.
  1. On the Main tab, click
    Local Traffic
    Profiles
    Services
    HTTP
    .
    The HTTP profile list screen opens.
  2. Click the name of a user-defined profile.
  3. Select the
    Custom
     check box.
  4. In the
    Send Proxy Via Header In Request
     list, do one of the following:
    • Select the
      Preserve
       option to include the
      Via
       header in the client request to the origin web server.
    • Select the
      Append
       option, and then type a string in the
      Send Proxy Via Header Host Name
       field, which is appended as a comment when sending a
      Via
       header in a request to an origin web server.
  5. In the
    Send Proxy Via Header In Response
     list, do one of the following:
    • Select the
      Preserve
       option to include the
      Via
       header in the client response to the client.
    • Select the
      Append
       option, and then type a string in the
      Send Proxy Via Header Host Name
       field, which is appended as a comment when sending a
      Via
       header in a response to a client.
  6. Click
    Finished
    .
The BIG-IP system is configured to use Via headers to identify protocols and intermediate proxies that forward messages.

Removing Via headers from requests and responses

Via headers are configured in an HTTP profile for requests or responses.
You can remove Via headers from requests and responses if you no longer require them to identify information about intermediate proxies.
  1. On the Main tab, click
    Local Traffic
    Profiles
    Services
    HTTP
    .
    The HTTP profile list screen opens.
  2. Click the name of a user-defined profile.
  3. Select the
    Custom
     check box.
  4. In the
    Send Proxy Via Header In Request
     list, select
    Remove
    .
  5. In the
    Send Proxy Via Header In Response
     list, select
    Remove
    .
  6. Click
    Finished
    .
The BIG-IP system removes Via headers, as configured, for requests and responses.
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