Once upon a time, bruce badouglas@gmail.com said:
hi.
trying to do a simple curl for the college site curl -A "Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.11) Gecko/2009061118 Fedora/3.0.11-1.fc9 Firefox/3.0.11" -L https://isiscc.smc.edu/pls/apex/f?p=123:1:3916268190676791 -vvv
They have a VeriSign-signed SSL cert, but they probably didn't follow the directions and install the intermediate cert correctly (it might work in Firefox because it includes more CA certs). Only the server admins for isiscc.smc.edu can fix that.
Until they get it fixed, you can bypass cert validation with the "--insecure" option to curl or the "--no-check-certificate" option to wget. It isn't recommended because it defeats the purpose of SSL.