hi, What about supporting snat pool feature, like f5 SNAT pools[1] ?
I went through on a phenomenon“(Cannot assign requested address) while connecting to upstream”in error log, root cause was the available ports exhausted at ip_local_port_range. In addition, some customers expect that support more than 6.5W new concurrent connections on per instance(nginx). [1] https://support.f5.com/csp/article/K7820 Kwanhur Huang TL;DR
