Citrix Systems 9.2 - page 256

242 Citrix NetScaler Policy Configuration and Reference Guide
Remove old headers from
a request and insert an
NS-Client header
add rewrite action del_x_forwarded_for
delete_http_header x-forwarded-for
add rewrite action del_client_ip
delete_http_header client-ip
add rewrite policy
check_x_forwarded_for_policy
'HTTP.REQ.HEADER("x-forwarded-for").EXISTS'
del_x_forwarded_for
add rewrite policy check_client_ip_policy
'HTTP.REQ.HEADER("client-ip").EXISTS'
del_client_ip
add rewrite action insert_ns_client_header
insert_http_header NS-Client 'CLIENT.IP.SRC'
add rewrite policy insert_ns_client_policy
'HTTP.REQ.HEADER("x-forwarded-for").EXISTS
|| HTTP.REQ.HEADER("client-ip").EXISTS'
insert_ns_client_header
bind rewrite global
check_x_forwarded_for_policy 100 200
bind rewrite global check_client_ip_policy
200 300
bind rewrite global insert_ns_client_policy
300 END
Examples of Advanced Expressions and Policies
Purpose Example