Can't login to heroku through firewall

I'm trying to connect to heroku via CLI (using heroku's Toolbelt) and I'm unable to do so. When I type my credentials, heroku replies with:

Post https://api.heroku.com/login: x509: certificate signed by unknown authority

I'm inside a company's firewall that blocks most connections, and I have to use a certificate to navigate.

What can I do to login to heroku via cli?

I was also facing this issue because of my organization's firewall. Solution is to simply download and install the organization's certs.

Once you have your organization's specific ".cer" file then convert that file to ".pem" using
```
openssl x509 -inform der -in orgCertFile.cer -out certificate.pem
```
Next, set following variable either as system variable or temp variable in current command line
```
export SSL_CERT_FILE=orgCertFile.cer
export NODE_EXTRA_CA_CERTS=certificate.pem
```
Finally try logging in using heroku command
```
heroku login
```

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