mirror of
http://git.haproxy.org/git/haproxy.git/
synced 2024-12-14 23:44:41 +00:00
30 lines
1.1 KiB
Plaintext
30 lines
1.1 KiB
Plaintext
|
When NetScaler application switch is used as L3+ switch, informations
|
||
|
|
regarding the original IP and TCP headers are lost as a new TCP
|
||
|
|
connection is created between the NetScaler and the backend server.
|
||
|
|
|
||
|
|
NetScaler provides a feature to insert in the TCP data the original data
|
||
|
|
that can then be consumed by the backend server.
|
||
|
|
|
||
|
|
Specifications and documentations from NetScaler:
|
||
|
|
https://support.citrix.com/article/CTX205670
|
||
|
|
https://www.citrix.com/blogs/2016/04/25/how-to-enable-client-ip-in-tcpip-option-of-netscaler/
|
||
|
|
|
||
|
|
When CIP is enabled on the NetScaler, then a TCP packet is inserted just after
|
||
|
|
the TCP handshake. This is composed as:
|
||
|
|
|
||
|
|
- CIP magic number : 4 bytes
|
||
|
|
Both sender and receiver have to agree on a magic number so that
|
||
|
|
they both handle the incoming data as a NetScaler Client IP insertion
|
||
|
|
packet.
|
||
|
|
|
||
|
|
- Header length : 4 bytes
|
||
|
|
Defines the length on the remaining data.
|
||
|
|
|
||
|
|
- IP header : >= 20 bytes if IPv4, 40 bytes if IPv6
|
||
|
|
Contains the header of the last IP packet sent by the client during TCP
|
||
|
|
handshake.
|
||
|
|
|
||
|
|
- TCP header : >= 20 bytes
|
||
|
|
Contains the header of the last TCP packet sent by the client during TCP
|
||
|
|
handshake.
|