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Which of the below mentioned statements helps the user understand a proxy protocol with TCP configuration?

A user has configured ELB with a TCP listener at ELB as well as on the back-end instances. The user wants to
enable a proxy protocol to capture the source and destination IP information in the header. Which of the
below mentioned statements helps the user understand a proxy protocol with TCP configuration?

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A.
If the end user is requesting behind a proxy server then the user should not enable a proxy protocol
on ELB

B.
ELB does not support a proxy protocol when it is listening on both the load balancer and the back-end
instances

C.
Whether the end user is requesting from a proxy server or directly, it does not make a difference for

the proxy protocol

D.
If the end user is requesting behind the proxy then the user should add the “isproxy” flag to the ELB
Configuration

Explanation:
When the user has configured Transmission Control Protocol (TCP. or Secure Sockets Layer (SSL. for both frontend and back-end connections of the Elastic Load Balancer, the load balancer forwards the request to the
back-end instances without modifying the request headers unless the proxy header is enabled. If the end user
is requesting from a Proxy Protocol enabled proxy server, then the ELB admin should not enable the Proxy
Protocol on the load balancer. If the Proxy Protocol is enabled on both the proxy server and the load balancer,
the load balancer will add another header to the request which already has a header from the proxy server.
This duplication may result in errors.

6 Comments on “Which of the below mentioned statements helps the user understand a proxy protocol with TCP configuration?

  1. GG Sophia says:

    A

    If Proxy Protocol is enabled on both the proxy server and the load balancer, the load balancer adds another header to the request, which already has a header from the proxy server. Depending on how your instance is configured, this duplication might result in errors.




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