diff --git a/django/contrib/comments/views/comments.py b/django/contrib/comments/views/comments.py
index 8798c05a01..324ba0f0c9 100644
--- a/django/contrib/comments/views/comments.py
+++ b/django/contrib/comments/views/comments.py
@@ -204,7 +204,7 @@ def post_comment(request):
     new_data = request.POST.copy()
     new_data['content_type_id'] = content_type_id
     new_data['object_id'] = object_id
-    new_data['ip_address'] = request.META['REMOTE_ADDR']
+    new_data['ip_address'] = request.META.get('REMOTE_ADDR')
     new_data['is_public'] = comments.IS_PUBLIC in option_list
     response = HttpResponse()
     manipulator = PublicCommentManipulator(request.user,
diff --git a/django/core/handlers/base.py b/django/core/handlers/base.py
index c0e22dbb6a..00149ff791 100644
--- a/django/core/handlers/base.py
+++ b/django/core/handlers/base.py
@@ -79,7 +79,7 @@ class BaseHandler:
             if DEBUG:
                 return self.get_technical_error_response()
             else:
-                subject = 'Database error (%s IP): %s' % ((request.META['REMOTE_ADDR'] in INTERNAL_IPS and 'internal' or 'EXTERNAL'), getattr(request, 'path', ''))
+                subject = 'Database error (%s IP): %s' % ((request.META.get('REMOTE_ADDR') in INTERNAL_IPS and 'internal' or 'EXTERNAL'), getattr(request, 'path', ''))
                 message = "%s\n\n%s" % (self._get_traceback(), request)
                 mail_admins(subject, message, fail_silently=True)
                 return self.get_friendly_error_response(request, resolver)
@@ -89,7 +89,7 @@ class BaseHandler:
             if DEBUG:
                 return self.get_technical_error_response()
             else:
-                subject = 'Coding error (%s IP): %s' % ((request.META['REMOTE_ADDR'] in INTERNAL_IPS and 'internal' or 'EXTERNAL'), getattr(request, 'path', ''))
+                subject = 'Coding error (%s IP): %s' % ((request.META.get('REMOTE_ADDR') in INTERNAL_IPS and 'internal' or 'EXTERNAL'), getattr(request, 'path', ''))
                 try:
                     request_repr = repr(request)
                 except:
diff --git a/django/core/xheaders.py b/django/core/xheaders.py
index 80210a25a0..98d2586b75 100644
--- a/django/core/xheaders.py
+++ b/django/core/xheaders.py
@@ -17,6 +17,6 @@ def populate_xheaders(request, response, package, python_module_name, object_id)
     within the INTERNAL_IPS setting.
     """
     from django.conf.settings import INTERNAL_IPS
-    if request.META['REMOTE_ADDR'] in INTERNAL_IPS:
+    if request.META.get('REMOTE_ADDR') in INTERNAL_IPS:
         response['X-Object-Type'] = "%s.%s" % (package, python_module_name)
         response['X-Object-Id'] = str(object_id)
diff --git a/django/middleware/doc.py b/django/middleware/doc.py
index 8f648e0665..9345dbfcef 100644
--- a/django/middleware/doc.py
+++ b/django/middleware/doc.py
@@ -12,7 +12,7 @@ class XViewMiddleware:
         with an x-header indicating the view function.  This is used by the
         documentation module to lookup the view function for an arbitrary page.
         """
-        if request.META['REQUEST_METHOD'] == 'HEAD' and request.META['REMOTE_ADDR'] in settings.INTERNAL_IPS:
+        if request.META['REQUEST_METHOD'] == 'HEAD' and request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS:
             response = httpwrappers.HttpResponse()
             response['X-View'] = "%s.%s" % (view_func.__module__, view_func.__name__)
             return response