Tip: If I want to restrict access between the environments on a single account, it can be automatically configured for me with the Network Isolation feature.
Container Firewall Management via CloudJiffy UI
Each node at CloudJiffyPaaS (excluding custom Docker- and Windows-based containers) is provisioned with a set of firewall rules, which can be reviewed and managed through a comfortable graphical user interface. The appropriate section can be accessed by clicking on the Settings button next to the required environment and selecting the Firewall menu item.
Here, the following tabs are available:
Overview - provides general information on the feature, allows to change Firewall State (which is enabled for all containers by default) and shows Isolated Env Groups the current environment is included to
Inbound Rules - allows managing incoming requests (not listed ones will be denied by default)
Outbound Rules - allows controlling outgoing connections (not listed ones will be allowed by default)
Default Firewall Rules
CloudJiffy automatically fills the Inbound and Outbound Rules sections with a number of records, required for the proper container operability.
Here, rules are grouped by layers and are marked with the following color labels:
gray for the default non-editable records (i.e. the obligatory ones)
white for other default (stack-related) and user-added (either by an environment owner or his collaborators) rules
Note: Apply changes to the default rules only in the case I know exactly what I am doing, since these records are required to ensure stack specific functionality and to provide particular features support (e.g. to allow SSH, HTTP, HTTPS or FTP connections).
The very first record has the highest priority (1) and allows CloudJiffyinfrastructure to access a container. While working with the container, some management operations (e.g. creating mount points, installing FTP addon, etc) can automatically complement the list of default rules. Herewith, each rule is added with a 10 points priority step, allowing to insert new ones in between the default records without the necessity to edit the already applied connection permissions.
In order to manage existing and provide new rules to the firewall, the tools panel above the list contains a set of buttons for a convenient firewall rules management, namely: Add, Edit, Remove, Disable (Enable) and Refresh.
When adding a new firewall rule, the following parameters should be defined:
Nodes - to select the required environment layer
Name - to provide a name for this record (can be expanded to select from a number of commonly used rules)
Protocol - to set the required protocol type (TCP, UDP or TCP/UDP)
Port Range - to define a particular port (e.g. 80) or their range (e.g. 1024-2048) to be opened/closed for connection; leave this field blank to apply the rule to all ports
Source - to select the request source:
Custom IP Address(es) - a comma-separated list of IPv4/IPv6 addresses and CIDR blocks (e.g. 10.0.0.1,10.0.0.0/24)
predefined ranges - All, All IPv4, All IPv6, Local Network, Internet (Public Access)
Environment Nodes - node type (layer) from any environment on an account (after appliance this rule will be automatically adjusted upon the appropriate layer scaling)
Priority - to set a rule priority (where rules with the lower value will be applied first)
Action - to define the required action upon receiving the matching request (either allow or deny)
Subsequently, if meeting the necessity to Edit any of predefined rules, I’ll be able to adjust all of the above-described parameters except the Nodes field (i.e. target layer can not be switched). Also, with testing purposes, I can temporarily exclude some firewall records and reapply them later on with the appropriate Disable/Enable buttons. After some adjustment (for example, topology change), I may need to update the list of rules with the Refresh button.
Firewall Use Cases
Here, select the Inbound Rules subtab and click on the Add button.
In order to deny connection from a particular IP, fill in the fields as follows:
- Nodes - chose a container to restrict access to (tomcat in our case)
- Name - input any desired rule name (e.g. my-rule)
- Protocol - select a required protocol (TCP)
- Port Range - deny access to all ports by leaving this field blank
- Source - choose the Custom IP Address(es) option and type the necessary IP in the appeared Address Range field (220.127.116.11)
- Priority - set the appropriate priority for this record (e.g. 900 to be applied before the default rules)
Action - Select the Deny option
Click Add to save and automatically apply my rule.
This way I can deny access to my containers from any IP address.