Error while installing package and download Json data from Http - port 443: Connection refused

Error in curl::curl_fetch_memory(url, handle = h) :
Failed to connect to port 443: Connection refused

I understood that the firewall is not allowing to get the connection, since pac file is used to for internet access
Is there anyway alternative way to resolve this issue

You can set the proxy using httr::proxy. That's what I've done to install gitHub packages behind our corporate firewall.

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