DisallowedHost at / | Invalid HTTP_HOST header

For no apparent reason that I can think of, I am getting the:

Invalid HTTP_HOST header: '13.60.32.132:8000'. You may need to add '13.60.32.132' to ALLOWED_HOSTS.

The IP address been correctly added to my settings.py file. I am using Ubuntu 22.04.4 LTS (GNU/Linux 6.5.0-1014-aws x86_64) with the latest version of Django, which is Django 5.0.4

As per SO's requirements, these are the fully reproduceable steps I took which brought me to this issue:

1. I created an Amazon EC2 Instance (free tier).

2. The Outbound NSG settings are as follows:

   Port Range: 8000 Protocol: TCP Source: 0.0.0.0/0

   Port Range: 80 Protocol: TCP Source: 0.0.0.0/0

   Port Range: 443 Protocol: TCP Source: 0.0.0.0/0

3. The Inbound NSG Settings are as follows:

   Port Range: 443 Protocol: TCP Source: 0.0.0.0/0

4. I connected to my Ubuntu EC2 Server and successfully cloned my GitHub repository via the ssh methodology.

5. I ran the following commands:

   sudo apt updatesudo apt upgrade

   sudo apt install git

   sudo apt install python3 python3-pip

   sudo apt install python3-venv

6. I then continued to ensure that pip was installed to the latest version, before installing my venv and dependencies, by running the following commands:

   pip install --upgrade pip

   cd .ssh/<repository-name>

   python3 -m venv venv

   source venv/bin/activate

   pip install -r requirements.txt ## python==3.10.12## whitenoise==6.6.0## pillow==10.3.0## requests==2.21.10## django_bootstrap_icon

   (Note: it did not acknowledge installing Request however I ran the following command in my venv:

   The following message ensued, meaning this package has already been installed:

   (venv) ubuntu@ip-172-31-39-0:~/.ssh/<REPO-NAME>$ pip install requestsRequirement already satisfied: requests in ./venv/lib/python3.10/site-packages (2.31.0)Requirement already satisfied: charset-normalizer<4,>=2 in ./venv/lib/python3.10/site-packages (from requests) (3.3.2)Requirement already satisfied: idna<4,>=2.5 in ./venv/lib/python3.10/site-packages (from requests) (3.7)Requirement already satisfied: urllib3<3,>=1.21.1 in ./venv/lib/python3.10/site-packages (from requests) (2.2.1)Requirement already satisfied: certifi>=2017.4.17 in ./venv/lib/python3.10/site-packages (from requests) (2024.2.2)

7. I then ran the following command to run the Django migrations:

   python3 manage.py migrate

   (Running the ``collectstatic\ command was already done in the local server.)

8. I then ran started the server by running the following command:

   python3 manage.py runserver 0.0.0.0:8000

9. I then went to my browser going to http://13.60.32.132:8000

10. My settings.py is as follows:

    ALLOWED_HOSTS = ['13.60.32.132', '127.0.0.1']

11. The Django debug page traceback is as follows, under Request Information> Settings:

    ALLOWED_HOSTS   ['13.53.67.74', '127.0.0.1']

    **As you can see, Django still think's I'm trying to access an IP address 13.53.67.74 and not 13.60.32.132. My the correct IP address (13.60.32.132) is set in my settings.py file. Why does Django believe that I am attempting to access an IP address which no longer exists?

    Completely baffled.**

I have doubled checked the NSG settings, I expected to see my website when accessing the AWS-assigned IP address by visiting http://13.60.32.132:8000

Furthermore, I have rebooted the server and the unwanted result is the same.

I have tried setting my ALLOWED_HOSTS to [*] - which is not advisable in production - however, this isn't really the issue. The issue is that Django thinking I'm trying to access a non-existent IP address.

The traceback is as follows:

Invalid HTTP_HOST header: '13.60.32.132:8000'. You may need to add '13.60.32.132' to ALLOWED_HOSTS.Traceback (most recent call last):  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/core/handlers/exception.py", line 55, in inner    response = get_response(request)  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/utils/deprecation.py", line 133, in __call__    response = self.process_request(request)  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/middleware/common.py", line 48, in process_request    host = request.get_host()  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/http/request.py", line 151, in get_host    raise DisallowedHost(msg)django.core.exceptions.DisallowedHost: Invalid HTTP_HOST header: '13.60.32.132:8000'. You may need to add '13.60.32.132' to ALLOWED_HOSTS.ERROR:django.security.DisallowedHost:Invalid HTTP_HOST header: '13.60.32.132:8000'. You may need to add '13.60.32.132' to ALLOWED_HOSTS.Traceback (most recent call last):  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/core/handlers/exception.py", line 55, in inner    response = get_response(request)  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/utils/deprecation.py", line 133, in __call__    response = self.process_request(request)  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/middleware/common.py", line 48, in process_request    host = request.get_host()  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/http/request.py", line 151, in get_host    raise DisallowedHost(msg)django.core.exceptions.DisallowedHost: Invalid HTTP_HOST header: '13.60.32.132:8000'. You may need to add '13.60.32.132' to ALLOWED_HOSTS.Bad Request: /WARNING:django.request:Bad Request: /[15/Apr/2024 11:04:30] "GET / HTTP/1.1" 400 68141Invalid HTTP_HOST header: '13.60.32.132:8000'. You may need to add '13.60.32.132' to ALLOWED_HOSTS.Traceback (most recent call last):  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/core/handlers/exception.py", line 55, in inner    response = get_response(request)  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/utils/deprecation.py", line 133, in __call__    response = self.process_request(request)  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/middleware/common.py", line 48, in process_request    host = request.get_host()  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/http/request.py", line 151, in get_host    raise DisallowedHost(msg)django.core.exceptions.DisallowedHost: Invalid HTTP_HOST header: '13.60.32.132:8000'. You may need to add '13.60.32.132' to ALLOWED_HOSTS.ERROR:django.security.DisallowedHost:Invalid HTTP_HOST header: '13.60.32.132:8000'. You may need to add '13.60.32.132' to ALLOWED_HOSTS.Traceback (most recent call last):  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/core/handlers/exception.py", line 55, in inner    response = get_response(request)  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/utils/deprecation.py", line 133, in __call__    response = self.process_request(request)  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/middleware/common.py", line 48, in process_request    host = request.get_host()  File "/home/ubuntu/.ssh/<xxxxxxxxx>/venv/lib/python3.10/site-packages/django/http/request.py", line 151, in get_host    raise DisallowedHost(msg)django.core.exceptions.DisallowedHost: Invalid HTTP_HOST header: '13.60.32.132:8000'. You may need to add '13.60.32.132' to ALLOWED_HOSTS.Bad Request: /favicon.icoWARNING:django.request:Bad Request: /favicon.ico[15/Apr/2024 11:04:31] "GET /favicon.ico HTTP/1.1" 400 68105