Node JS connection establishment between two server - node.js

Question

In my sample project, I have used Google recaptcha. I need to verify captcha response at back end (Node JS). In NodeJS, I have used request module to connect with google server. But, I got some error like following
Error: connect ECONNREFUSED 172.217.166.100:443
at Object._errnoException (util.js:992:11)
at _exceptionWithHostPort (util.js:1014:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1186:14)
Node JS
formData = {
secret: 'xxxxxx',
response: 'yyyyyy'
}
request.post({
url: "https://www.google.com/recaptcha/api/siteverify",
form: formData
},
function (err, httpResponse, body) {
if (err) throw err;
if (body) {
res.send(body);
}
});
When I am trying to set proxy to this above NodeJS code like following...
formData = {
secret: 'xxxxxx',
response: 'yyyyyy'
}
request.post({
url: "https://www.google.com/recaptcha/api/siteverify",
form: formData,
proxy: '172.217.166.100' /// Google server IP
},
function (err, httpResponse, body) {
if (err) throw err;
if (body) {
res.send(body);
}
});
I got these errors....
Error: tunneling socket could not be established, cause=connect ECONNREFUSED 127.0.0.1:80
at ClientRequest.onError (C:\Users\Desktop\project\Backend\node_modules\tunnel-agent\index.js:177:17)
at Object.onceWrapper (events.js:315:30)
at emitOne (events.js:116:13)
at ClientRequest.emit (events.js:211:7)
at Socket.socketErrorListener (_http_client.js:387:9)
at emitOne (events.js:116:13)
at Socket.emit (events.js:211:7)
at emitErrorNT (internal/streams/destroy.js:64:8)
at _combinedTickCallback (internal/process/next_tick.js:138:11)
at process._tickCallback (internal/process/next_tick.js:180:9)
Can anyone help me to resolve this problem
Thanks in advance

Answer 1

Looks like you've specified something like,
proxy: '172.217.166.100' /// Google server IP
which is wrong, as you can't determine the IP address of google since it is dynamic and often changes it.
You can obtain a latest proxy IP from the below link,
https://code.google.com/archive/p/recaptcha/wikis/FirewallsAndRecaptcha.wiki
The latest available IP's are,
ip4:216.239.32.0/19 ip4:64.233.160.0/19 ip4:66.249.80.0/20
ip4:72.14.192.0/18 ip4:209.85.128.0/17 ip4:66.102.0.0/20
ip4:74.125.0.0/16 ip4:64.18.0.0/20 ip4:207.126.144.0/20
ip4:173.194.0.0/16
Hope this helps!