diff --git a/Gemfile.lock b/Gemfile.lock
index 808fbd19..d2c97bd8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -165,7 +165,7 @@ GEM
       activerecord (>= 5.a)
       database_cleaner-core (~> 2.0.0)
     database_cleaner-core (2.0.1)
-    date (3.3.3)
+    date (3.4.1)
     deprecation (1.1.0)
       activesupport
     devise (4.9.2)
diff --git a/config/environments/deployed.rb b/config/environments/deployed.rb
new file mode 100644
index 00000000..60a49efc
--- /dev/null
+++ b/config/environments/deployed.rb
@@ -0,0 +1,92 @@
+Rails.application.configure do
+  # Settings specified here will take precedence over those in config/application.rb.
+
+  # Code is not reloaded between requests.
+  config.cache_classes = true
+
+  # Eager load code on boot. This eager loads most of Rails and
+  # your application in memory, allowing both thread web servers
+  # and those relying on copy on write to perform better.
+  # Rake tasks automatically ignore this option for performance.
+  config.eager_load = true
+
+  # Full error reports are disabled and caching is turned on.
+  config.consider_all_requests_local       = false
+  config.action_controller.perform_caching = true
+
+  # Enable Rack::Cache to put a simple HTTP cache in front of your application
+  # Add `rack-cache` to your Gemfile before enabling this.
+  # For large-scale production use, consider using a caching reverse proxy like nginx, varnish or squid.
+  # config.action_dispatch.rack_cache = true
+
+  # Disable Rails's static asset server (Apache or nginx will already do this).
+  config.serve_static_files = false
+
+  # Compress JavaScripts and CSS.
+  config.assets.js_compressor = :uglifier
+  # config.assets.css_compressor = :sass
+
+  # Do not fallback to assets pipeline if a precompiled asset is missed.
+  config.assets.compile = false
+
+  # Generate digests for assets URLs.
+  config.assets.digest = true
+
+  # Version of your assets, change this if you want to expire all your assets.
+  config.assets.version = '1.0'
+
+  # Specifies the header that your server uses for sending files.
+  # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
+  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
+
+  # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
+  # config.force_ssl = true
+
+  # Set to :debug to see everything in the log.
+  config.log_level = :error
+
+  # Prepend all log lines with the following tags.
+  # config.log_tags = [ :subdomain, :uuid ]
+
+  # Use a different logger for distributed setups.
+  # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
+
+  # Use a different cache store in production.
+  # config.cache_store = :mem_cache_store
+
+  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
+  # config.action_controller.asset_host = "http://assets.example.com"
+
+  # Precompile additional assets.
+  # application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
+  # config.assets.precompile += %w( search.js )
+
+  # Ignore bad email addresses and do not raise email delivery errors.
+  # Set this to true and configure the email server for immediate delivery to raise delivery errors.
+  # config.action_mailer.raise_delivery_errors = false
+
+  config.action_mailer.delivery_method = :sendmail
+  config.action_mailer.sendmail_settings = {
+    :location       => '/usr/sbin/sendmail',
+    :arguments      => '-i -t'
+  }
+
+  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
+  # the I18n.default_locale when a translation can not be found).
+  config.i18n.fallbacks = true
+
+  # Send deprecation notices to registered listeners.
+  config.active_support.deprecation = :notify
+
+  # Disable automatic flushing of the log to improve performance.
+  # config.autoflush_log = false
+
+  # Use default logging formatter so that PID and timestamp are not suppressed.
+  config.log_formatter = ::Logger::Formatter.new
+
+  config.action_dispatch.trusted_proxies = [
+    # Add 127.0.0.1 as a trusted proxy so that the X-Forwarded-For value set by Anubis (or any other internal proxy)
+    # is whitelisted for use by the request.remote_ip IP-determining mechanism.
+    IPAddr.new('127.0.0.1')
+  ]
+end
diff --git a/config/environments/dlc_dev.rb b/config/environments/dlc_dev.rb
index fe92f3f0..9dc37d84 100644
--- a/config/environments/dlc_dev.rb
+++ b/config/environments/dlc_dev.rb
@@ -1,88 +1,11 @@
-Rails.application.configure do
-  # Settings specified here will take precedence over those in config/application.rb.
-
-  # Code is not reloaded between requests.
-  config.cache_classes = true
-
-  # Eager load code on boot. This eager loads most of Rails and
-  # your application in memory, allowing both thread web servers
-  # and those relying on copy on write to perform better.
-  # Rake tasks automatically ignore this option for performance.
-  config.eager_load = true
-
-  # Full error reports are disabled and caching is turned on.
-  config.consider_all_requests_local       = false
-  config.action_controller.perform_caching = true
-
-  # Enable Rack::Cache to put a simple HTTP cache in front of your application
-  # Add `rack-cache` to your Gemfile before enabling this.
-  # For large-scale production use, consider using a caching reverse proxy like nginx, varnish or squid.
-  # config.action_dispatch.rack_cache = true
-
-  # Disable Rails's static asset server (Apache or nginx will already do this).
-  config.serve_static_files = false
+require Rails.root.join('config/environments/deployed.rb')
 
-  # Compress JavaScripts and CSS.
-  config.assets.js_compressor = :uglifier
-  # config.assets.css_compressor = :sass
-
-  # Do not fallback to assets pipeline if a precompiled asset is missed.
-  config.assets.compile = false
-
-  # Generate digests for assets URLs.
-  config.assets.digest = true
-
-  # Version of your assets, change this if you want to expire all your assets.
-  config.assets.version = '1.0'
+Rails.application.configure do
+  # Setting host so that url helpers can be used in mailer views.
+  config.action_mailer.default_url_options = { host: 'dlc-rails-dev1.cul.columbia.edu' }
 
+  # Set default host for sitemap generator
   config.default_host = 'https://dlc-dev.library.columbia.edu'
-  # Specifies the header that your server uses for sending files.
-  # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
-  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
-
-  # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
-  # config.force_ssl = true
 
-  # Set to :debug to see everything in the log.
   config.log_level = :debug
-
-  # Prepend all log lines with the following tags.
-  # config.log_tags = [ :subdomain, :uuid ]
-
-  # Use a different logger for distributed setups.
-  # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
-
-  # Use a different cache store in production.
-  # config.cache_store = :mem_cache_store
-
-  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
-  # config.action_controller.asset_host = "http://assets.example.com"
-
-  # Precompile additional assets.
-  # application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
-  # config.assets.precompile += %w( search.js )
-
-  # Ignore bad email addresses and do not raise email delivery errors.
-  # Set this to true and configure the email server for immediate delivery to raise delivery errors.
-  # config.action_mailer.raise_delivery_errors = false
-
-  config.action_mailer.delivery_method = :sendmail
-  config.action_mailer.sendmail_settings = {
-    :location       => '/usr/sbin/sendmail',
-    :arguments      => '-i -t'
-  }
-  config.action_mailer.default_url_options = { :host => 'dlc-rails-dev1.cul.columbia.edu' }
-
-  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
-  # the I18n.default_locale when a translation can not be found).
-  config.i18n.fallbacks = true
-
-  # Send deprecation notices to registered listeners.
-  config.active_support.deprecation = :notify
-
-  # Disable automatic flushing of the log to improve performance.
-  # config.autoflush_log = false
-
-  # Use default logging formatter so that PID and timestamp are not suppressed.
-  config.log_formatter = ::Logger::Formatter.new
 end
diff --git a/config/environments/dlc_prod.rb b/config/environments/dlc_prod.rb
index 1f5fccfe..df09c442 100644
--- a/config/environments/dlc_prod.rb
+++ b/config/environments/dlc_prod.rb
@@ -1,88 +1,9 @@
-Rails.application.configure do
-  # Settings specified here will take precedence over those in config/application.rb.
-
-  # Code is not reloaded between requests.
-  config.cache_classes = true
-
-  # Eager load code on boot. This eager loads most of Rails and
-  # your application in memory, allowing both thread web servers
-  # and those relying on copy on write to perform better.
-  # Rake tasks automatically ignore this option for performance.
-  config.eager_load = true
-
-  # Full error reports are disabled and caching is turned on.
-  config.consider_all_requests_local       = false
-  config.action_controller.perform_caching = true
-
-  # Enable Rack::Cache to put a simple HTTP cache in front of your application
-  # Add `rack-cache` to your Gemfile before enabling this.
-  # For large-scale production use, consider using a caching reverse proxy like nginx, varnish or squid.
-  # config.action_dispatch.rack_cache = true
-
-  # Disable Rails's static asset server (Apache or nginx will already do this).
-  config.serve_static_files = false
+require Rails.root.join('config/environments/deployed.rb')
 
-  # Compress JavaScripts and CSS.
-  config.assets.js_compressor = :uglifier
-  # config.assets.css_compressor = :sass
-
-  # Do not fallback to assets pipeline if a precompiled asset is missed.
-  config.assets.compile = false
-
-  # Generate digests for assets URLs.
-  config.assets.digest = true
-
-  # Version of your assets, change this if you want to expire all your assets.
-  config.assets.version = '1.0'
+Rails.application.configure do
+  # Setting host so that url helpers can be used in mailer views.
+  config.action_mailer.default_url_options = { host: 'dlc-rails-prod1.cul.columbia.edu' }
 
+  # Set default host for sitemap generator
   config.default_host = 'https://dlc.library.columbia.edu'
-  # Specifies the header that your server uses for sending files.
-  # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
-  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
-
-  # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
-  # config.force_ssl = true
-
-  # Set to :debug to see everything in the log.
-  config.log_level = :error
-
-  # Prepend all log lines with the following tags.
-  # config.log_tags = [ :subdomain, :uuid ]
-
-  # Use a different logger for distributed setups.
-  # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
-
-  # Use a different cache store in production.
-  # config.cache_store = :mem_cache_store
-
-  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
-  # config.action_controller.asset_host = "http://assets.example.com"
-
-  # Precompile additional assets.
-  # application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
-  # config.assets.precompile += %w( search.js )
-
-  # Ignore bad email addresses and do not raise email delivery errors.
-  # Set this to true and configure the email server for immediate delivery to raise delivery errors.
-  # config.action_mailer.raise_delivery_errors = false
-
-  config.action_mailer.delivery_method = :sendmail
-  config.action_mailer.sendmail_settings = {
-    :location       => '/usr/sbin/sendmail',
-    :arguments      => '-i -t'
-  }
-  config.action_mailer.default_url_options = { :host => 'dlc-rails-prod1.cul.columbia.edu' }
-
-  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
-  # the I18n.default_locale when a translation can not be found).
-  config.i18n.fallbacks = true
-
-  # Send deprecation notices to registered listeners.
-  config.active_support.deprecation = :notify
-
-  # Disable automatic flushing of the log to improve performance.
-  # config.autoflush_log = false
-
-  # Use default logging formatter so that PID and timestamp are not suppressed.
-  config.log_formatter = ::Logger::Formatter.new
 end
diff --git a/config/environments/dlc_staging.rb b/config/environments/dlc_staging.rb
index 28d36ac4..4b6a44dd 100644
--- a/config/environments/dlc_staging.rb
+++ b/config/environments/dlc_staging.rb
@@ -1,88 +1,9 @@
-Rails.application.configure do
-  # Settings specified here will take precedence over those in config/application.rb.
-
-  # Code is not reloaded between requests.
-  config.cache_classes = true
-
-  # Eager load code on boot. This eager loads most of Rails and
-  # your application in memory, allowing both thread web servers
-  # and those relying on copy on write to perform better.
-  # Rake tasks automatically ignore this option for performance.
-  config.eager_load = true
-
-  # Full error reports are disabled and caching is turned on.
-  config.consider_all_requests_local       = false
-  config.action_controller.perform_caching = true
-
-  # Enable Rack::Cache to put a simple HTTP cache in front of your application
-  # Add `rack-cache` to your Gemfile before enabling this.
-  # For large-scale production use, consider using a caching reverse proxy like nginx, varnish or squid.
-  # config.action_dispatch.rack_cache = true
-
-  # Disable Rails's static asset server (Apache or nginx will already do this).
-  config.serve_static_files = false
+require Rails.root.join('config/environments/deployed.rb')
 
-  # Compress JavaScripts and CSS.
-  config.assets.js_compressor = :uglifier
-  # config.assets.css_compressor = :sass
-
-  # Do not fallback to assets pipeline if a precompiled asset is missed.
-  config.assets.compile = false
-
-  # Generate digests for assets URLs.
-  config.assets.digest = true
-
-  # Version of your assets, change this if you want to expire all your assets.
-  config.assets.version = '1.0'
+Rails.application.configure do
+  # Setting host so that url helpers can be used in mailer views.
+  config.action_mailer.default_url_options = { host: 'dlc-rails-test1.cul.columbia.edu' }
 
+  # Set default host for sitemap generator
   config.default_host = 'https://dlc-staging.library.columbia.edu'
-  # Specifies the header that your server uses for sending files.
-  # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
-  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
-
-  # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
-  # config.force_ssl = true
-
-  # Set to :debug to see everything in the log.
-  config.log_level = :error
-
-  # Prepend all log lines with the following tags.
-  # config.log_tags = [ :subdomain, :uuid ]
-
-  # Use a different logger for distributed setups.
-  # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
-
-  # Use a different cache store in production.
-  # config.cache_store = :mem_cache_store
-
-  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
-  # config.action_controller.asset_host = "http://assets.example.com"
-
-  # Precompile additional assets.
-  # application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
-  # config.assets.precompile += %w( search.js )
-
-  # Ignore bad email addresses and do not raise email delivery errors.
-  # Set this to true and configure the email server for immediate delivery to raise delivery errors.
-  # config.action_mailer.raise_delivery_errors = false
-
-  config.action_mailer.delivery_method = :sendmail
-  config.action_mailer.sendmail_settings = {
-    :location       => '/usr/sbin/sendmail',
-    :arguments      => '-i -t'
-  }
-  config.action_mailer.default_url_options = { :host => 'dlc-rails-test1.cul.columbia.edu' }
-
-  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
-  # the I18n.default_locale when a translation can not be found).
-  config.i18n.fallbacks = true
-
-  # Send deprecation notices to registered listeners.
-  config.active_support.deprecation = :notify
-
-  # Disable automatic flushing of the log to improve performance.
-  # config.autoflush_log = false
-
-  # Use default logging formatter so that PID and timestamp are not suppressed.
-  config.log_formatter = ::Logger::Formatter.new
 end
diff --git a/config/environments/dlc_test.rb b/config/environments/dlc_test.rb
index ccc9bc81..aa38c183 100644
--- a/config/environments/dlc_test.rb
+++ b/config/environments/dlc_test.rb
@@ -1,88 +1,11 @@
-Rails.application.configure do
-  # Settings specified here will take precedence over those in config/application.rb.
-
-  # Code is not reloaded between requests.
-  config.cache_classes = true
-
-  # Eager load code on boot. This eager loads most of Rails and
-  # your application in memory, allowing both thread web servers
-  # and those relying on copy on write to perform better.
-  # Rake tasks automatically ignore this option for performance.
-  config.eager_load = true
-
-  # Full error reports are disabled and caching is turned on.
-  config.consider_all_requests_local       = false
-  config.action_controller.perform_caching = true
-
-  # Enable Rack::Cache to put a simple HTTP cache in front of your application
-  # Add `rack-cache` to your Gemfile before enabling this.
-  # For large-scale production use, consider using a caching reverse proxy like nginx, varnish or squid.
-  # config.action_dispatch.rack_cache = true
-
-  # Disable Rails's static asset server (Apache or nginx will already do this).
-  config.serve_static_files = false
+require Rails.root.join('config/environments/deployed.rb')
 
-  # Compress JavaScripts and CSS.
-  config.assets.js_compressor = :uglifier
-  # config.assets.css_compressor = :sass
-
-  # Do not fallback to assets pipeline if a precompiled asset is missed.
-  config.assets.compile = false
-
-  # Generate digests for assets URLs.
-  config.assets.digest = true
-
-  # Version of your assets, change this if you want to expire all your assets.
-  config.assets.version = '1.0'
+Rails.application.configure do
+  # Setting host so that url helpers can be used in mailer views.
+  config.action_mailer.default_url_options = { host: 'dlc-rails-test1.cul.columbia.edu' }
 
+  # Set default host for sitemap generator
   config.default_host = 'https://dlc-test.library.columbia.edu'
-  # Specifies the header that your server uses for sending files.
-  # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
-  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
-
-  # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
-  # config.force_ssl = true
-
-  # Set to :debug to see everything in the log.
-  config.log_level = :debug
-
-  # Prepend all log lines with the following tags.
-  # config.log_tags = [ :subdomain, :uuid ]
-
-  # Use a different logger for distributed setups.
-  # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
-
-  # Use a different cache store in production.
-  # config.cache_store = :mem_cache_store
-
-  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
-  # config.action_controller.asset_host = "http://assets.example.com"
-
-  # Precompile additional assets.
-  # application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
-  # config.assets.precompile += %w( search.js )
-
-  # Ignore bad email addresses and do not raise email delivery errors.
-  # Set this to true and configure the email server for immediate delivery to raise delivery errors.
-  # config.action_mailer.raise_delivery_errors = false
-
-  config.action_mailer.delivery_method = :sendmail
-  config.action_mailer.sendmail_settings = {
-    :location       => '/usr/sbin/sendmail',
-    :arguments      => '-i -t'
-  }
-  config.action_mailer.default_url_options = { :host => 'dlc-rails-test1.cul.columbia.edu' }
-
-  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
-  # the I18n.default_locale when a translation can not be found).
-  config.i18n.fallbacks = true
-
-  # Send deprecation notices to registered listeners.
-  config.active_support.deprecation = :notify
-
-  # Disable automatic flushing of the log to improve performance.
-  # config.autoflush_log = false
 
-  # Use default logging formatter so that PID and timestamp are not suppressed.
-  config.log_formatter = ::Logger::Formatter.new
+  config.log_level = :info
 end