Vagrant plugin install behind a proxy

Hi, i am trying to install a plugin from a Debian Buster Server behind a squid proxy.

export HTTP_PROXY … or in http_proxy
export HTTPS_PROXY …

is set.

wget to
https://gems.hashicorp.com/
https://rubygems.org/
works too.

but a

vagrant plugin install vagrant-vsphere --debug

 INFO global: Vagrant version: 2.2.3
 INFO global: Ruby version: 2.5.5
 INFO global: RubyGems version: 2.7.6.2
 INFO global: VAGRANT_NO_PLUGINS="1"
 INFO global: VAGRANT_DISABLE_PLUGIN_INIT="1"
 INFO global: VAGRANT_LOG="debug"
 WARN global: resolv replacement has not been enabled!
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/pushes/heroku/plugin.rb
 INFO manager: Registered plugin: heroku
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/pushes/atlas/plugin.rb
 INFO manager: Registered plugin: atlas
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/pushes/local-exec/plugin.rb
 INFO manager: Registered plugin: local-exec
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/pushes/ftp/plugin.rb
 INFO manager: Registered plugin: ftp
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/pushes/noop/plugin.rb
 INFO manager: Registered plugin: noop
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/provisioners/cfengine/plugin.rb
 INFO manager: Registered plugin: CFEngine Provisioner
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/provisioners/file/plugin.rb
 INFO manager: Registered plugin: file
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/provisioners/docker/plugin.rb
 INFO manager: Registered plugin: docker
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/provisioners/salt/plugin.rb
 INFO manager: Registered plugin: salt
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/provisioners/chef/plugin.rb
 INFO manager: Registered plugin: chef
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/provisioners/ansible/plugin.rb
 INFO manager: Registered plugin: ansible
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/provisioners/shell/plugin.rb
 INFO manager: Registered plugin: shell
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/provisioners/puppet/plugin.rb
 INFO manager: Registered plugin: puppet
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/upload/plugin.rb
 INFO manager: Registered plugin: upload command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/rdp/plugin.rb
 INFO manager: Registered plugin: rdp command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/powershell/plugin.rb
 INFO manager: Registered plugin: powershell command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/plugin/plugin.rb
 INFO manager: Registered plugin: plugin command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/halt/plugin.rb
 INFO manager: Registered plugin: halt command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/global-status/plugin.rb
 INFO manager: Registered plugin: global-status command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/port/plugin.rb
 INFO manager: Registered plugin: port command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/provider/plugin.rb
 INFO manager: Registered plugin: provider command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/suspend/plugin.rb
 INFO manager: Registered plugin: suspend command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/login/plugin.rb
 INFO manager: Registered plugin: vagrant-login
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/ssh_config/plugin.rb
 INFO manager: Registered plugin: ssh-config command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/package/plugin.rb
 INFO manager: Registered plugin: package command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/resume/plugin.rb
 INFO manager: Registered plugin: resume command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/reload/plugin.rb
 INFO manager: Registered plugin: reload command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/snapshot/plugin.rb
 INFO manager: Registered plugin: snapshot command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/cloud/plugin.rb
 INFO manager: Registered plugin: vagrant-cloud
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/box/plugin.rb
 INFO manager: Registered plugin: box command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/provision/plugin.rb
 INFO manager: Registered plugin: provision command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/destroy/plugin.rb
 INFO manager: Registered plugin: destroy command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/winrm/plugin.rb
 INFO manager: Registered plugin: winrm command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/winrm_config/plugin.rb
 INFO manager: Registered plugin: winrm-config command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/version/plugin.rb
 INFO manager: Registered plugin: version command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/push/plugin.rb
 INFO manager: Registered plugin: push command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/ssh/plugin.rb
 INFO manager: Registered plugin: ssh command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/init/plugin.rb
 INFO manager: Registered plugin: init command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/validate/plugin.rb
 INFO manager: Registered plugin: validate command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/list-commands/plugin.rb
 INFO manager: Registered plugin: list-commands command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/up/plugin.rb
 INFO manager: Registered plugin: up command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/cap/plugin.rb
 INFO manager: Registered plugin: cap command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/status/plugin.rb
 INFO manager: Registered plugin: status command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/help/plugin.rb
 INFO manager: Registered plugin: help command
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/gentoo/plugin.rb
 INFO manager: Registered plugin: Gentoo guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/tinycore/plugin.rb
 INFO manager: Registered plugin: TinyCore Linux guest.
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/trisquel/plugin.rb
 INFO manager: Registered plugin: Trisquel guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/alt/plugin.rb
 INFO manager: Registered plugin: ALT Platform guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/mint/plugin.rb
 INFO manager: Registered plugin: Mint guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/suse/plugin.rb
 INFO manager: Registered plugin: SUSE guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/windows/plugin.rb
 INFO manager: Registered plugin: Windows guest.
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/bsd/plugin.rb
 INFO manager: Registered plugin: BSD-based guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/amazon/plugin.rb
 INFO manager: Registered plugin: Amazon Linux guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/linux/plugin.rb
 INFO manager: Registered plugin: Linux guest.
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/arch/plugin.rb
 INFO manager: Registered plugin: Arch guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/solaris11/plugin.rb
 INFO manager: Registered plugin: Solaris 11 guest.
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/dragonflybsd/plugin.rb
 INFO manager: Registered plugin: DragonFly BSD guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/smartos/plugin.rb
 INFO manager: Registered plugin: SmartOS guest.
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/kali/plugin.rb
 INFO manager: Registered plugin: Kali guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/openbsd/plugin.rb
 INFO manager: Registered plugin: OpenBSD guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/solaris/plugin.rb
 INFO manager: Registered plugin: Solaris guest.
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/debian/plugin.rb
 INFO manager: Registered plugin: Debian guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/ubuntu/plugin.rb
 INFO manager: Registered plugin: Ubuntu guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/darwin/plugin.rb
 INFO manager: Registered plugin: Darwin guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/esxi/plugin.rb
 INFO manager: Registered plugin: ESXi guest.
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/fedora/plugin.rb
 INFO manager: Registered plugin: Fedora guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/photon/plugin.rb
 INFO manager: Registered plugin: VMware Photon guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/pld/plugin.rb
 INFO manager: Registered plugin: PLD Linux guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/nixos/plugin.rb
 INFO manager: Registered plugin: NixOS guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/haiku/plugin.rb
 INFO manager: Registered plugin: Haiku guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/redhat/plugin.rb
 INFO manager: Registered plugin: Red Hat Enterprise Linux guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/netbsd/plugin.rb
 INFO manager: Registered plugin: NetBSD guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/omnios/plugin.rb
 INFO manager: Registered plugin: OmniOS guest.
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/coreos/plugin.rb
 INFO manager: Registered plugin: CoreOS guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/atomic/plugin.rb
 INFO manager: Registered plugin: Atomic Host guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/slackware/plugin.rb
 INFO manager: Registered plugin: Slackware guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/freebsd/plugin.rb
 INFO manager: Registered plugin: FreeBSD guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/elementary/plugin.rb
 INFO manager: Registered plugin: Elementary guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/guests/funtoo/plugin.rb
 INFO manager: Registered plugin: Funtoo guest
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/synced_folders/smb/plugin.rb
 INFO manager: Registered plugin: SMB synced folders
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/synced_folders/rsync/plugin.rb
 INFO manager: Registered plugin: RSync synced folders
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/synced_folders/nfs/plugin.rb
 INFO manager: Registered plugin: NFS synced folders
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/kernel_v2/plugin.rb
 INFO manager: Registered plugin: kernel
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/communicators/winssh/plugin.rb
 INFO manager: Registered plugin: windows ssh communicator
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/communicators/winrm/plugin.rb
 INFO manager: Registered plugin: winrm communicator
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/communicators/ssh/plugin.rb
 INFO manager: Registered plugin: ssh communicator
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/providers/hyperv/plugin.rb
 INFO manager: Registered plugin: Hyper-V provider
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/providers/docker/plugin.rb
 INFO manager: Registered plugin: docker-provider
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/providers/virtualbox/plugin.rb
 INFO manager: Registered plugin: VirtualBox provider
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/kernel_v1/plugin.rb
 INFO manager: Registered plugin: kernel
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/hosts/gentoo/plugin.rb
 INFO manager: Registered plugin: Gentoo host
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/hosts/alt/plugin.rb
 INFO manager: Registered plugin: ALT Platform host
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/hosts/suse/plugin.rb
 INFO manager: Registered plugin: SUSE host
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/hosts/windows/plugin.rb
 INFO manager: Registered plugin: Windows host
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/hosts/bsd/plugin.rb
 INFO manager: Registered plugin: BSD host
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/hosts/linux/plugin.rb
 INFO manager: Registered plugin: Linux host
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/hosts/null/plugin.rb
 INFO manager: Registered plugin: null host
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/hosts/arch/plugin.rb
 INFO manager: Registered plugin: Arch host
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/hosts/void/plugin.rb
 INFO manager: Registered plugin: Void host
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/hosts/darwin/plugin.rb
 INFO manager: Registered plugin: Mac OS X host
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/hosts/redhat/plugin.rb
 INFO manager: Registered plugin: Red Hat Enterprise Linux host
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/hosts/slackware/plugin.rb
 INFO manager: Registered plugin: Slackware host
DEBUG global: Loading core plugin: /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/hosts/freebsd/plugin.rb
 INFO manager: Registered plugin: FreeBSD host
 INFO vagrant: `vagrant` invoked: ["plugin", "install", "vagrant-vsphere", "--debug"]
DEBUG vagrant: Creating Vagrant environment
 INFO environment: Environment initialized (#<Vagrant::Environment:0x0000559d13a54528>)
 INFO environment:   - cwd: /home/mertens
 INFO environment: Home path: /root/.vagrant.d
DEBUG environment: Effective local data path:
 WARN environment: No local data path is set. Local data cannot be stored.
 WARN manager: Plugin loading is disabled
DEBUG manager: Enabling globalized plugins
 WARN manager: Plugin initialization is disabled
 WARN manager: Plugin loading is disabled
 INFO loader: Loading configuration in order: [:home, :root]
DEBUG loader: Configuration loaded successfully, finalizing and returning
DEBUG push: finalizing
 INFO environment: Running hook: environment_plugins_loaded
 INFO runner: Preparing hooks for middleware sequence...
 INFO runner: 1 hooks defined.
 INFO runner: Running action: environment_plugins_loaded #<Vagrant::Action::Builder:0x0000559d137f4418>
 INFO environment: Running hook: environment_load
 INFO runner: Preparing hooks for middleware sequence...
 INFO runner: 1 hooks defined.
 INFO runner: Running action: environment_load #<Vagrant::Action::Builder:0x0000559d13754440>
 WARN checkpoint_client: checkpoint library not found. disabling.
 INFO cli: CLI: [] "plugin" ["install", "vagrant-vsphere"]
DEBUG cli: Invoking command class: VagrantPlugins::CommandPlugin::Command::Root ["install", "vagrant-vsphere"]
DEBUG checkpoint_client: waiting for checkpoint to complete...
DEBUG checkpoint_client: no information received from checkpoint
DEBUG root: Invoking command class: VagrantPlugins::CommandPlugin::Command::Install ["vagrant-vsphere"]
 INFO host: Autodetecting host type for [#<Vagrant::Environment: /home/mertens>]
DEBUG host: Trying: gentoo
DEBUG host: Trying: alt
DEBUG host: Trying: suse
DEBUG host: Trying: arch
DEBUG host: Trying: void
DEBUG host: Trying: darwin
DEBUG host: Trying: redhat
DEBUG host: Trying: slackware
DEBUG host: Trying: freebsd
DEBUG host: Trying: windows
DEBUG host: Trying: bsd
DEBUG host: Trying: linux
 INFO host: Detected: linux!
 INFO runner: Preparing hooks for middleware sequence...
 INFO runner: 1 hooks defined.
 INFO runner: Running action:  #<Vagrant::Action::Builder:0x0000559d1325b038>
 INFO warden: Calling IN action: #<VagrantPlugins::CommandPlugin::Action::InstallGem:0x0000559d12a05348>
 INFO interface: info: Installing the 'vagrant-vsphere' plugin. This can take a few minutes...
Installing the 'vagrant-vsphere' plugin. This can take a few minutes...
DEBUG bundler: Enabling strict dependency enforcement
DEBUG bundler: Dependency list for installation:
 - vagrant-libvirt > 0
 - vagrant-vsphere > 0
 - bcrypt_pbkdf = 1.0.0
 - bigdecimal = 1.3.4
 - blankslate = 3.1.3
 - builder = 3.2.3
 - bundler = 1.17.3
 - childprocess = 0.9.0
 - cmath = 1.0.0
 - colored = 1.2
 - concurrent-ruby = 1.0.5
 - cri = 2.15.2
 - csv = 1.0.0
 - date = 1.0.0
 - dbm = 1.0.0
 - did_you_mean = 1.2.1
 - domain_name = 0.5.20160216
 - ed25519 = 1.2.4
 - erubis = 2.7.0
 - etc = 1.0.0
 - excon = 0.60.0
 - faraday = 0.13.1
 - faraday_middleware = 0.12.2
 - fast_gettext = 1.2.0
 - fcntl = 1.0.0
 - ffi = 1.9.10
 - fiddle = 1.0.0
 - fileutils = 1.0.2
 - fog-core = 2.1.0
 - fog-json = 1.2.0
 - fog-libvirt = 0.6.0
 - fog-xml = 0.1.1
 - formatador = 0.2.5
 - gdbm = 2.0.0
 - gettext = 3.2.9
 - gettext-setup = 0.30
 - http-cookie = 1.0.3
 - i18n = 1.5.3
 - io-console = 0.4.6
 - ipaddr = 1.2.0
 - json = 2.1.0
 - listen = 3.1.5
 - locale = 2.1.2
 - log4r = 1.1.10
 - mime-types = 3.2.2
 - mime-types-data = 3.2015.1120
 - minitar = 0.6.1
 - minitest = 5.11.3
 - molinillo = 0.6.4
 - multi_json = 1.12.1
 - multipart-post = 2.0.0
 - net-http-persistent = 2.9.4
 - net-scp = 1.2.1
 - net-sftp = 2.1.2
 - net-ssh = 5.1.0
 - net-telnet = 0.1.1
 - netrc = 0.11.0
 - nokogiri = 1.10.0
 - oj = 3.7.6
 - openssl = 2.1.2
 - pkg-config = 1.3.4
 - power_assert = 1.1.1
 - psych = 3.0.2
 - puppet_forge = 2.2.9
 - r10k = 3.1.0
 - rake = 12.3.1
 - rb-inotify = 0.9.10
 - rdoc = 6.0.1
 - rest-client = 2.0.2
 - ruby-libvirt = 0.7.1
 - rubyzip = 1.2.2
 - rugged = 0.27.4
 - scanf = 1.0.0
 - sdbm = 1.0.0
 - semantic_puppet = 1.0.2
 - sqlite3 = 1.3.13
 - stringio = 0.0.1
 - strscan = 1.0.0
 - test-unit = 3.2.8
 - text = 1.3.0
 - thor = 0.19.4
 - unf = 0.1.4
 - unf_ext = 0.0.7.5
 - vagrant = 2.2.3
 - vagrant_cloud = 2.0.2
 - vim-addon-manager = 0.5.10
 - webrick = 1.4.2
 - xmlrpc = 0.3.0
 - zlib = 1.0.0
DEBUG bundler: Enabling user defined remote RubyGems sources
DEBUG bundler: Enabling default remote RubyGems sources
DEBUG bundler: Adding source - https://gems.hashicorp.com/
DEBUG bundler: Adding source - https://rubygems.org/
ERROR warden: Error occurred: 403 "Forbidden"
 INFO warden: Beginning recovery process...
 INFO warden: Calling recover: #<VagrantPlugins::CommandPlugin::Action::InstallGem:0x0000559d12a05348>
 INFO warden: Recovery complete.
 INFO environment: Running hook: environment_unload
 INFO runner: Preparing hooks for middleware sequence...
 INFO runner: 1 hooks defined.
 INFO runner: Running action: environment_unload #<Vagrant::Action::Builder:0x0000559d13387010>
Traceback (most recent call last):
        40: from /usr/bin/vagrant:23:in `<main>'
        39: from /usr/bin/vagrant:23:in `load'
        38: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/bin/vagrant:177:in `<top (required)>'
        37: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/lib/vagrant/environment.rb:291:in `cli'
        36: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/lib/vagrant/cli.rb:58:in `execute'
        35: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/plugin/command/root.rb:66:in `execute'
        34: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/plugin/command/install.rb:69:in `execute'
        33: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/plugin/command/install.rb:69:in `each'
        32: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/plugin/command/install.rb:70:in `block in execute'
        31: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/plugin/command/base.rb:14:in `action'
        30: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/lib/vagrant/action/runner.rb:66:in `run'
        29: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/lib/vagrant/util/busy.rb:19:in `busy'
        28: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/lib/vagrant/action/runner.rb:66:in `block in run'
        27: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/lib/vagrant/action/builder.rb:116:in `call'
        26: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/lib/vagrant/action/warden.rb:34:in `call'
        25: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/plugins/commands/plugin/action/install_gem.rb:30:in `call'
        24: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/lib/vagrant/plugin/manager.rb:148:in `install_plugin'
        23: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/lib/vagrant/plugin/manager.rb:138:in `block in install_plugin'
        22: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/lib/vagrant/bundler.rb:133:in `install'
        21: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/lib/vagrant/bundler.rb:335:in `internal_install'
        20: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/lib/vagrant/bundler.rb:427:in `validate_configured_sources!'
        19: from /usr/lib/ruby/2.5.0/rubygems/source_list.rb:98:in `each_source'
        18: from /usr/lib/ruby/2.5.0/rubygems/source_list.rb:98:in `each'
        17: from /usr/share/rubygems-integration/all/gems/vagrant-2.2.3/lib/vagrant/bundler.rb:429:in `block in validate_configured_sources!'
        16: from /usr/lib/ruby/2.5.0/rubygems/source.rb:194:in `load_specs'
        15: from /usr/lib/ruby/2.5.0/rubygems/remote_fetcher.rb:327:in `cache_update_path'
        14: from /usr/lib/ruby/2.5.0/rubygems/remote_fetcher.rb:292:in `fetch_path'
        13: from /usr/lib/ruby/2.5.0/rubygems/remote_fetcher.rb:251:in `fetch_http'
        12: from /usr/lib/ruby/2.5.0/rubygems/remote_fetcher.rb:368:in `request'
        11: from /usr/lib/ruby/2.5.0/rubygems/request.rb:156:in `fetch'
        10: from /usr/lib/ruby/2.5.0/rubygems/request.rb:187:in `perform_request'
         9: from /usr/lib/ruby/2.5.0/rubygems/request.rb:132:in `connection_for'
         8: from /usr/lib/ruby/2.5.0/rubygems/request/http_pool.rb:20:in `checkout'
         7: from /usr/lib/ruby/2.5.0/rubygems/request/http_pool.rb:39:in `make_connection'
         6: from /usr/lib/ruby/2.5.0/rubygems/request/https_pool.rb:7:in `setup_connection'
         5: from /usr/lib/ruby/2.5.0/rubygems/request/http_pool.rb:43:in `setup_connection'
         4: from /usr/lib/ruby/2.5.0/net/http.rb:915:in `start'
         3: from /usr/lib/ruby/2.5.0/net/http.rb:920:in `do_start'
         2: from /usr/lib/ruby/2.5.0/net/http.rb:958:in `connect'
         1: from /usr/lib/ruby/2.5.0/net/http/response.rb:131:in `value'
/usr/lib/ruby/2.5.0/net/http/response.rb:122:in `error!': 403 "Forbidden" (Net::HTTPServerException)

ends only with an error :frowning:

Problem solved,

in the proxy configuration was the beginning dot **.**rubygems.org for api.rubygems forgotten.