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wdisp/HTTPS/sticky_mask - HTTPS: sticky mask for client IP addresses

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| Parameter : wdisp/HTTPS/sticky_mask                                  |

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| Short description : HTTPS: Sticky mask for client ip addresses       |

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| Parameter Description :                                              |

| -----------------------                                              |

| Note: This parameter is only required for HTTPS connections          |

| This parameter has no meaning for HTTP connections!                  |

|                                                                      |

| This parameter describes a bit mask for client IP addresses.         |

| The IP address of a client that connects to the Web Dispatcher is    |

| combined with this bit mask (AND) and the result is used for the     |

| load balancing of clients.                                           |

| In this way, groups of client IP addresses can be combined.          |

| This function is required because large Internet providers use       |

| multiple proxies (with different IP addresses, but the clients must  |

| be handled in the same way (applications with a status in the        |

| server).                                                             |

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| Application Area: SAP Web Dispatcher                                 |

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| Unit :  character string                                             |

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| Default value : 255.255.240.0                                        |

| In this way the last 12 bits of the client IP address are no longer  |

| significant (are not differentiated).                                |

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| Who is permitted to make changes: The customer                       |

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| Limitations for Operating Systems: None                              |

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| Limitations for Database Systems: None                               |

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| Other Parameters Affected or Dependent:                              |

|   The size of the mapping table in memory is influenced by the       |

|   sticky mask. The more bits that are set to 0, the fewer different  |

|   client IP addresses must be administered:                          |

|   If all bits are set, there can be 2^32 possible entries; if 12     |

|   bits are 0, still 2^20: #Entries = 2^(32-#0bits).                  |

|   The parameter %%wdisp/max_client_ip_entries%% specifies the size   |

|   of the table in memory.                                            |

|                                                                      |

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| Valid Input, Formats, Areas:                                         |

|    Character string with four numerical specification (0-255) that   |

|    are separated from each other with a full stop. No full stop and  |

|    no numerical value may be omitted.                                |

|    Examples of correct values: 255.255.255.255 or 0.0.0.0            |

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| Short Description : HTTPS: sticky mask for client IP addresses 

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| Applications Area : WebDisp 

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| Parameter Type : S 

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| Changes allowed : X 

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| Valid for Operating System : * 

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| Dynamic switchable :  

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| Same on all Servers :  

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