Failed to open TCP connection to centos7-devel.dhcp223-65.example.com:8443

Problem:
katello seems to be broken, facing issues when i click on products/activation keys/etc.

error log:

19:06:06 rails.1   | 2018-05-25T19:06:06 [F|app|]   
19:06:06 rails.1   | 2018-05-25T19:06:06 [F|app|] ActionView::Template::Error (Failed to open TCP connection to centos7-devel.dhcp223-65.example.com:8443 (No route to host - connect(2) for "centos7-devel.dhcp223-65.example.com" port 8443)):
19:06:06 rails.1   | 2018-05-25T19:06:06 [F|app|]     18:     angular.module('Bastion.features').value('FeatureSettings', angular.fromJson(<%= SETTINGS[:features].nil? ? {} : SETTINGS[:features].to_json.html_safe %>));
19:06:06 rails.1   |  |     19:     angular.module('Bastion').value('currentLocale', '<%= I18n.locale %>');
19:06:06 rails.1   |  |     20:     angular.module('Bastion').value('CurrentOrganization', "<%= Organization.current.id if Organization.current %>");
19:06:06 rails.1   |  |     21:     angular.module('Bastion').value('contentAccessMode', "<%= Organization.current.try(:content_access_mode) if Organization.current %>");
19:06:06 rails.1   |  |     22:     angular.module('Bastion').value('foreman', tfm);
19:06:06 rails.1   |  |     23:     angular.module('Bastion').value('repositoryTypes', angular.fromJson('<%= Katello::RepositoryTypeManager.repository_types.values.to_json.html_safe %>'));
19:06:06 rails.1   |  |     24:     angular.module('Bastion').value('deleteHostOnUnregister', angular.fromJson('<%= Setting[:unregister_delete_host] %>'));
19:06:06 rails.1   | 2018-05-25T19:06:06 [F|app|]   
19:06:06 rails.1   | 2018-05-25T19:06:06 [F|app|] /home/vagrant/katello/app/lib/katello/http_resource.rb:84:in `get'
19:06:06 rails.1   |  | /home/vagrant/katello/app/lib/katello/resources/candlepin/owner.rb:27:in `find'
19:06:06 rails.1   |  | /home/vagrant/katello/app/models/katello/glue/candlepin/owner.rb:24:in `owner_details'
19:06:06 rails.1   |  | /home/vagrant/katello/app/models/katello/glue/candlepin/owner.rb:39:in `content_access_mode'
19:06:06 rails.1   |  | bastion (6.1.11) app/views/bastion/layouts/assets.html.erb:21:in `block in _f1e9bc0cdd6d70da7d9e68de77828fd2'
19:06:06 rails.1   |  | bastion (6.1.11) app/views/bastion/layouts/assets.html.erb:12:in `_f1e9bc0cdd6d70da7d9e68de77828fd2'
19:06:06 rails.1   |  | bastion (6.1.11) app/views/bastion/layouts/application.html.erb:11:in `_2cbe0825a8ae518a23a74bdcc85bea08'
19:06:06 rails.1   |  | bastion (6.1.11) app/controllers/bastion/bastion_controller.rb:10:in `index'
19:06:06 rails.1   |  | app/controllers/concerns/application_shared.rb:15:in `set_timezone'
19:06:06 rails.1   |  | app/models/concerns/foreman/thread_session.rb:32:in `clear_thread'
19:06:06 rails.1   |  | app/controllers/concerns/foreman/controller/topbar_sweeper.rb:12:in `set_topbar_sweeper_controller'
19:06:06 rails.1   |  | lib/middleware/telemetry.rb:9:in `call'
19:06:06 rails.1   |  | lib/middleware/catch_json_parse_errors.rb:8:in `call'
19:06:06 rails.1   |  | lib/middleware/logging_context.rb:23:in `call'
19:06:06 rails.1   |  | /home/vagrant/katello/lib/katello/prevent_json_parsing.rb:12:in `call'
19:06:07 rails.1   | 2018-05-25T19:06:07 [I|app|]   Rendered /home/vagrant/.rvm/gems/ruby-2.4.1/gems/actionpac

you can find the paste here: https://paste.fedoraproject.org/paste/51aOaTzQxaXNYH9a6TQ7fQ