Gists for blogpost, 'Configure Chef on Windows for a Proxy Server': http://wp.me/p1RD28-11w. Settings for knife.rb file when using a proxy server from a Windows host. Set environment variables manually or use the Windows' command 'setx VARIABLE value'. You must close the current windows prompt and open a new one to see the SETX changes (env | gr…

knife.rb

# See http://docs.opscode.com/config_rb_knife.html 
# for more information on knife configuration options
# Knife expects USERNAME, USERDNSDOMAIN, PASSWORD, PROXY_SERVER,
# and PROXY_PORT environment variables to be set at runtime.

current_dir = File.dirname(__FILE__)
log_level                :info
log_location             STDOUT
node_name                "chef_user_here"
client_key               "#{ENV['HOME']}/.chef/chef_client_here.pem"
validation_client_name   "organization_here-validator"
validation_key           "#{ENV['HOME']}/.chef/organization_here-validator.pem"
chef_server_url          "https://api.opscode.com/organizations/organization_here"
cache_type               'BasicFile'
cache_options( :path =>  "#{ENV['HOME']}/.chef/checksums" )
cookbook_path            [ "#{ENV['HOME']}/path/to/your/cookbooks",
                           "#{ENV['HOME']}/other/path/to/your/cookbooks"
                         ]
                         
# comment below block when not behind proxy
#=begin
# proxy server settings
no_proxy                 ENV['NO_PROXY']
http_proxy               ENV['HTTP_PROXY']
http_proxy_user          ENV['USERNAME']
http_proxy_pass          ENV['PASSWORD']
https_proxy              ENV['HTTPS_PROXY']
https_proxy_user         ENV['USERNAME']
https_proxy_pass         ENV['PASSWORD']

# knife upload requires rest client proxy. Ignores above settings.
# install rest-client gem: gem install rest-client
# http://rubydoc.info/github/rest-client/rest-client
require 'rest-client'
RestClient.proxy = ENV['HTTP_PROXY']
#=end

Added support for knife upload from behind proxy. knife upload ignores http_proxy. See chef open tickets. Fix is to install rest-client gem and add above two lines to knife.rb file.