A client can prepend a spoofed entry to X-Forwarded-For before
the request reaches our load balancer. Taking the first value
would return the attacker's address. Since we sit behind a
single trusted LB that appends the real client IP as the last
entry, switch to rightmost extraction for both X-Forwarded-For
and RFC 7239 Forwarded headers.
Signed-off-by: Émile Ré <emile@getprobo.com>
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