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May someone find it useful.Įdit: It's a really common suggestion to turn off HTTPS for this problem either by using an HTTP registry or setting NODE_TLS_REJECT_UNAUTHORIZED. I think that's everything I know about getting npm to work behind a proxy/firewall. To cut a long story short, the self-signed certificate needs to be installed into npm to avoid SELF_SIGNED_CERT_IN_CHAIN: npm config set cafile ""Īlternatively, the NODE_EXTRA_CA_CERTS environment variable can be set to the certificate file. As you can imagine, I was overcome with the feeling of safety.
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But because those writers of malicious software were now delivering malware via HTTPS, the only way they could protect we poor innocent users was to man-in-the-middle every connection to scan for threats before they even reached us. Not only that, but it would no longer use NTLM! A brave new world to be sure. "We need to decrypt all HTTPS traffic because viruses"Īfter this set-up had been humming along (clunkily) for about a year, the corporate overlords decided to change the proxy. Otherwise, for npm use (as suggests): npm config set proxy Then I had to tell all the programs that couldn't do NTLM to use my local machine as the proxy - which is generally as simple as setting HTTP_PROXY and HTTPS_PROXY.

I resorted to using Cntlm on my local machine (unauthenticated), then had it handle the NTLM authentication with the upstream proxy. HTTP basic authentication wasn't enough to satisfy whatever proxy my corporate overlords had installed.
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That code plagued me for the longest time until after a lot of time on Google, I learned my proxy used NTLM authentication. There is an HTTP status code 407 (proxy authentication required), which is the more correct way of saying it's the proxy rather than the destination server that's rejecting your request. If it is basic authentication on the proxy, you'll want to set the environment variable to something of the form: dreaded NTLM Normally the environment variable would look something like: īut you're getting a 403 which suggests you're not being authenticated against your proxy. not working because they use HTTPS_PROXY (except when they use HTTP_PROXY - see later). That means you can have Chrome (which uses the proxy specified in your Internet Options) connecting to the URL just fine, but npm, pip, maven etc. Under Windows, lots of software also uses your OS specified proxy which is a totally different thing. HTTP_PROXY & HTTPS_PROXY are environment variables used by lots of software to know where your proxy is. I'll try and keep this platform agnostic/aware where possible.
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behind a corporate firewall under Windows - it's not fun. I've had to work with npm, pip, maven etc. Set this environment variable to extend pre-defined certs: Replace existing certs # Windows/MacOS/Linux TL DR - Just run this and don't disable your security:
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Yet it still times out with the same error $ npm install coffee-script I used to get SSL certificate errors in my web browser too, until I installed the 'npmCA' certificate as a 'trusted root certification authority' in Control Panel's Internet Options (screenshot )Įdit: I tried an insecure workaround per npm set strict-ssl false How can I fix this? Without compromising security. To connect to insecurely, use `-no-check-certificate'. connected.ĮRROR: cannot verify 's certificate, issued by `/C=US/ST=CA/L=Oakland/O=npm/OU=npm Certificate to locally verify the issuer's authority.
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I believe the problem relates to SSL certificates, because if I download that URL with wget, I get an explicit error about certificates $ wget I know the environment variable is correct, because the Python package manager pip follows it correctly. I've configured the environment variable https_proxy (per the npm user guide). While I happen to use a https proxy, I'm confident this isn't the problem. However, when I browse to that same URL in my web browser (Google Chrome) it loads fine (see footnote). Npm ERR! at Socket.socketOnData (http.js:1393:11)

Npm ERR! at ClientRequest.g (events.js:193:14) Npm ERR! at ClientRequest.onConnect (c:\Program Files\nodejs\node_modules\npm\node_modules\request\tunnel.js:148:19) Npm ERR! Error: tunneling socket could not be established, sutatusCode=403

After a long wait, I eventually get an error 'tunneling socket could not be established, sutatusCode=403'. When I try to install a package with npm, it doesn't work.
