This may well help:
https://www.nginx.com/blog/overcoming-ephemeral-port-exhaustion-nginx-plus/

On 10/04/2018 13:54, Salikhov Dinislam wrote:
> Hello,
>
> On Linux, NINGX can have more than 65K connections to backends per one local
> address of a proxy (set via proxy_bind), as Linux support
> IP_BIND_ADDRESS_NO_PORT socket option.
>
> I wonder if it is possible to have more than 65K proxy connections on
> FreeBSD? And if yes, does NGINX support it?
>
> Thanks in advance.
>
> Posted at Nginx Forum: https://forum.nginx.org/read.php?2,279368,279368#msg-279368
>
> _______________________________________________
> nginx mailing list
> nginx@nginx.org
> http://mailman.nginx.org/mailman/listinfo/nginx

_______________________________________________
nginx mailing list
nginx@nginx.org
http://mailman.nginx.org/mailman/listinfo/nginx