how to know client or requestor ip address

[Darwin Tjowandi]

hi everyone,

what's the best ways to know the ip address of clients / requesters  submitting web api calls to the ca api gw hosts that are behind a load balancer ?
i think it can be obtained from the http header ? if it can, how ?

thanks
darwin

[Deactivated User]

If you are using a load balancer ahead of the Layer 7 API  gateway, you will need the load balancer to set an header value like client IP in header which you can access using header attributes
https://community.broadcom.com/communities/community-home/digestviewer/viewthread?MID=771522

If there is no load balancer you can use tcp layer context variable to access this value 
https://techdocs.broadcom.com/content/broadcom/techdocs/us/en/ca-enterprise-software/layer7-api-management/api-gateway/9-2/reference/context-variables/transport-layer-context-variables.html
e.g.

${request.tcp.remoteHost}

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Pre-Sales Consultant
CA Southern Africa
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[Darwin Tjowandi]

thanks ronald.  in my case, the context variable that contains the client ip address is ${request.http.headervalues.x-forwarded-for}.  this works after x-forwarded-for setting is enabled on the load balancer (for the hosts behind the vip)

[Blood Thief]

Thank you for the explanation. It is clear for me.