eastearth commented on issue #4942:
URL: https://github.com/apache/apisix/issues/4942#issuecomment-909043746
> the response is not processed by the gateway (apisix).
>
> See the nginx conf
>
> ### the following x-forwarded-* headers is to send to upstream server
> ```
> set $var_x_forwarded_for $remote_addr;
> set $var_x_forwarded_proto $scheme;
> set $var_x_forwarded_host $host;
> set $var_x_forwarded_port $server_port;
>
> if ($http_x_forwarded_for != "") {
> set $var_x_forwarded_for "${http_x_forwarded_for},
${realip_remote_addr}";
> }
> if ($http_x_forwarded_proto != "") {
> set $var_x_forwarded_proto $http_x_forwarded_proto;
> }
> if ($http_x_forwarded_host != "") {
> set $var_x_forwarded_host $http_x_forwarded_host;
> }
> if ($http_x_forwarded_port != "") {
> set $var_x_forwarded_port $http_x_forwarded_port;
> }
>
> proxy_set_header X-Forwarded-For $var_x_forwarded_for;
> proxy_set_header X-Forwarded-Proto $var_x_forwarded_proto;
> proxy_set_header X-Forwarded-Host $var_x_forwarded_host;
> proxy_set_header X-Forwarded-Port $var_x_forwarded_port;
> ```
>
> so you can add some header to the previous proxy. set the X-Forwarded-Port
to 80 to resolve it
my previous proxy is Layer 4 proxy,can not add headers,and I think this is a
bug,cant fix it?
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