Python urllib2 giving "network unreachable error" if the URL is https

Question

I am trying to fetch some urls using urllib2 library.

a = urllib2.urlopen("http://www.google.com")
ret = a.read()

Code above is working fine, and giving expected result. But when I make the url https, it gives "network unreachable" error

a = urllib2.urlopen("https://www.google.com")
urllib2.URLError: <urlopen error [Errno 101] Network is unreachable>

Is there any problem with ssl? My python version is Python2.6.5. I am also behind an academic proxy server. I have the settings in bash file. Anyway, since http is opening proxy shouldn't be the problem here.

Answer 1

Normally the issue in cases like this is the proxy you are behind having an out of date or untrusted SSL certificate. urllib is fussier than most browsers when it comes to SSL and this is why you might be getting this error.