curl: (60) SSL certificate problem: unable to get local issuer certificate

Question

root@sclrdev:/home/sclr/certs/FreshCerts# curl --ftp-ssl --verbose ftp://{abc}/ -u trup:trup --cacert /etc/ssl/certs/ca-certificates.crt
* About to connect() to {abc         


        

Answer 1

So far, I've seen this issue happen within corporate networks because of two reasons, one or both of which may be happening in your case:

1. Because of the way network proxies work, they have their own SSL certificates, thereby altering the certificates that curl sees. Many or most enterprise networks force you to use these proxies.
2. Some antivirus programs running on client PCs also act similarly to an HTTPS proxy, so that they can scan your network traffic. Your antivirus program may have an option to disable this function (assuming your administrators will allow it).

As a side note, No. 2 above may make you feel uneasy about your supposedly secure TLS traffic being scanned. That's the corporate world for you.