NGINX error: "Invalid port in upstream" when using proxy_pass with IPv6 -

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i have been unable find explanation nginx error on nginx version: nginx/1.9.14.

this nginx.conf attempts forward client request webserver port 442 port 9442.

when using ipv4 client , server address works fine , webserver request forwarded 9442. when using ipv6 address client , server address following error occurs:

2017/08/21 19:05:56 [error] 6694#0: *5 invalid port in upstream "2000::157:9442/", client: 2000::158, server: , request: "get / http/1.1",   host: "[2000::157]:442"

nginx.conf:

http {     server {         listen       442 ssl; # ipv4 support         listen       [::]:442 ssl; # ipv6 support          ssl_certificate      /etc/ssl/active.crt;         ssl_certificate_key  /etc/ssl/active.key;          ssl on;         ssl_session_cache builtin:1000 shared:ssl:10m;         ssl_protocols tlsv1 tlsv1.1 tlsv1.2;         ssl_prefer_server_ciphers on;          location / {             proxy_pass https://$server_addr:9442$request_uri;         }     } }

what "invalid port in upstream" mean exactly?

note ipv6 addresses in example made sake of example , on private network not seen outside world.

so issue because of ip formats. $sever_addr 127.0.0.1 or local ip ipv4. while ipv6 ::1 or 2000::157 1 got. or have : in address.

now when proxy_pass using $server_addr, become either http://127.0.0.1:9442 or http://::1:9442. ipv4 1 valid ipv6 1 not valid. needs http://[::1]:9442. fix easy, use map in our http block.

map $server_addr $proxy_pass_ip {     default "$server_addr";     ~.*:.*   "[$server_addr]"; }

and change our location block like

location / {    proxy_pass https://$proxy_pass_ip:9442$request_uri; }




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