2018-12-24 11:03:24 +00:00
|
|
|
====================================
|
|
|
|
|
nginx: IP Based Access Control Lists
|
|
|
|
|
====================================
|
|
|
|
|
|
|
|
|
|
.. Warning::
|
|
|
|
|
|
|
|
|
|
Source IPs of UDP may be spoofed because the protocol is connectionless.
|
|
|
|
|
If there is an attacker who can manipulte your WAN, the attacker can also
|
|
|
|
|
use any WAN IP which has been whitelisted. It is safer, not to use this
|
|
|
|
|
as the only protection for your webservices.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Background Information
|
|
|
|
|
======================
|
|
|
|
|
|
|
|
|
|
IP based ACLs can be externally used to allow access (whitelist strategy) to a
|
|
|
|
|
specific web service only by customers so you can easily get rid of most of the
|
|
|
|
|
malicious traffic to the application server.
|
|
|
|
|
This also has some downsides: For example, the site will probably
|
|
|
|
|
not be visible to search engines and will therefore not be indexed.
|
|
|
|
|
On the other hand you can also blacklist (blacklist strategy) some bot IPs and
|
|
|
|
|
some bulletproof_ hosting ranges.
|
|
|
|
|
|
|
|
|
|
.. _bulletproof: https://en.wikipedia.org/wiki/Bulletproof_hosting
|
|
|
|
|
|
|
|
|
|
Configuration
|
|
|
|
|
=============
|
|
|
|
|
|
|
|
|
|
Create Users
|
|
|
|
|
------------
|
|
|
|
|
|
2019-03-06 17:27:21 +00:00
|
|
|
Navigate to the :menuselection:`Access --> IP ACL` tab.
|
2018-12-24 11:03:24 +00:00
|
|
|
|
|
|
|
|
.. image:: images/nginx_ip_acl_01_list_view.png
|
|
|
|
|
|
|
|
|
|
Click the + button to create a new ACL.
|
|
|
|
|
|
|
|
|
|
.. image:: images/nginx_ip_acl_02_create_acl_view.png
|
|
|
|
|
|
|
|
|
|
Next enter a reasonable title, for example here "Allow Private IPs" was used.
|
|
|
|
|
Now the different IP addresses or IP ranges can be entered. In this case some
|
|
|
|
|
common private IP ranges were allowed and the default rule was set to block.
|
|
|
|
|
A new line can be added by clicking the + icon while the trash can icon deletes the row.
|
|
|
|
|
This means that this service should be only visible internally.
|
|
|
|
|
|
|
|
|
|
.. Warning::
|
|
|
|
|
Keep in mind that carrier grade NAT (CGN) may cause some trouble with these
|
|
|
|
|
ACLs too. Please check how your traffic is handled first.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Assign it to a Location, HTTP or Stream-Server
|
|
|
|
|
-----------------------------------------------
|
|
|
|
|
|
|
|
|
|
In the last step, the user list must be added to the object, that supports it.
|
|
|
|
|
At the moment this are the HTTP Server, the Stream Server and the HTTP
|
|
|
|
|
locations. For example to add the ACL to a location, open it and select the
|
|
|
|
|
ACL in the dropdown:
|
|
|
|
|
|
|
|
|
|
.. image:: images/nginx_ip_acl_03_location.png
|
|
|
|
|
|
|
|
|
|
After saving the location and restarting nginx, you are done.
|
|
|
|
|
|
