Why sudo curl ignores proxy settings?
By Jessica Wood •
$ echo $http_proxy
$ curl -v
* About to connect() to proxy my.proxy.com
# Correct downloading
$ sudo echo $http_proxy
$sudo curl -v
# Hanging.Last command doesn't use proxy. Why?
$su
$curl -v Is also working correctly.
2 Answers
This doesn't do what you think it does:
sudo echo $http_proxyWith that, $http_proxy is expanded by the shell before sudo gets called, so it picks up your own environment.
A plain su (without -, -l or --login) also keeps (most of) the environment intact, so the proxy settings are inherited.
sudo does not preserve the environment by default. You could try either:
sudo -E curl ...(to preserve the whole environment, if you're allowed to do that), or
sudo http_proxy=$http_proxy curl ...to only pass http_proxy along (safer).
Specify the host as:
- a command line argument (-x)
- on the command line (var=moo command)
- or export it to your environment
$ curl -x 87.98.136.60 $ curl 84.202.82.63 $ http_proxy= curl 87.98.136.60 $ http_proxy= curl 84.202.82.63 $ export http_proxy= curl 87.98.136.60 $ http_proxy= sudo curl 84.202.82.63 $ export http_proxy= sudo -E curl 
