cabal can't use http proxy
cabal, cabal-install, haskell
Solution
You can use cntlm to talk to proxy. It will handle authentication issues. After configuring and installing `cntlm`, set up the new environmental variable by modifying `http_proxy`, `https_proxy` etc.
Your `cabal` command should work after that.
Problem
My Linux(redhat6) server has to use http proxy to connect to outside world. While it works for other things like wget, it doesn't work for cabal. ``` cabal update -v3 ``` shows errors like this: 407 - proxy authentication required cabal: Failed to download http://hackage.haskell.org/packages/archive/00-index.tar.gz : ErrorMisc "Unsucessful HTTP code: 407" I tried to change http_proxy environment variable to format like http:// user: passwd at proxy:port, but it doesn't work either. The same problem has been asked here But I'm not allowed use a proxy server like polipo, is there any other way to make cabal work behind a proxy?