F5 Prevent File Types From Uploading Irule
Manual Chapter : Information Groups
Applies To:
Bear witness Versions 
Nearly data groups
Data groups are useful when writing iRules. A data group is only a group of related elements, such as a set of IP addresses for AOL clients. When you specify a data group along with the class friction match command or the contains operator, you lot eliminate the need to list multiple values as arguments in an iRule expression.
You can define three types of data groups: address, integer, and string.
The BIG-IP arrangement includes 3 pre-configured data groups: private_net, images, and aol.
To sympathise the usefulness of data groups, information technology is helpful to showtime empathise the form match command and the contains operator.
Notation: You tin manage only those data groups that y'all have permission to manage, based on your user role and partition access consignment.
Alert: Do not endeavour to alter or delete any of the three pre-configured data groups (private_net, images, and aol). Doing and so can produce adverse results.
About the class match control
The Large-IP organization includes an iRule control called class, with a lucifer choice, which you can use to select a puddle based on whether the command beingness used in the iRule represents a member of a specific data group. When you use the course command, the Big-IP system knows that the cord following the identifier is the name of a data group.
For example, using the class command, you lot can cause the Big-IP system to load residual all incoming AOL connections to the pool aol_pool, if the value of the IP::remote_addr command is a member of the information group AOL. In this case, the class match command simply indicates that the object named aol is a collection of values (that is, a data group).
when CLIENT_ACCEPTED { if { [form match [IP::remote_addr] equals aol] } { pool aol_pool } else { pool all_pool } }
Storage options
With Local Traffic Manager, you can shop data groups in two ways, either in-line or externally.
In-line storage
When you create data groups, Local Traffic Manager automatically saves them in their entirety in the bigip.conf file. This type of storage is known equally in-line storage.
In general, in-line storage uses additional arrangement resources due to all-encompassing searching requirements on large data groups. For this reason, Local Traffic Manager offers you lot the power to store your information groups externally, that is, exterior of the bigip.conf file file.
External storage
You lot have the choice to store information groups in another location on the BIG-IP system, that is, outside of the bigip.conf file. Such data groups are called external data groups. Because the data grouping is stored externally in some other location, the bigip.conf file itself contains only the filename and meta-information for the data group. The data in an externally-stored information group file is stored equally a comma-separated list of values (CSV format).
Important: If yous attempt to load a bigip.conf file that contains external information group meta-data, and the file was created prior to BIG-IP arrangement version nine.4, the arrangement generates an error. The meta-data for the external data group contains the keyword extern, which generates an error during the load procedure. On BIG-IP systems running version 9.4 or later, the extern keyword is no longer needed in the bigip.conf file.
To create an external data group, y'all kickoff import a file from another location, using the System options of the Large-IP Configuration utility. You so use the Local Traffic iRules screens to create an external information group that is based on the imported file.
External information groups tin can scale to greater than x,000,000 entries, depending on platform hardware and available memory (8 GB, or more than, memory is recommended). Information groups with larger data items tin can be supported with fewer entries. Additionally, updates to external data groups are completely diminutive: for example, the system updates a information group only after the new data successfully completes loading. You can employ the command [course exists xyz] to check whether a data group has finished loading.
About file import for data groups
Using the BIG-IP Configuration utility, y'all tin can import an external file that contains content that you desire to apply in a information group. When you import an existing file to the Big-IP arrangement, the BIG-IP system then creates a data group that contains the specified blazon of file content (address, string, or integer).
Importing a file for a data grouping
Using the BIG-IP Configuration utility, you can import a file from an external organisation and utilize the file to create a data group.
Viewing a list of imported data group files
Using the Big-IP Configuration utility, y'all can view a list of information group files that you have imported onto the Big-IP system.
- On the Principal tab, click .
- In the Proper noun cavalcade, view the list of files.
Source: https://techdocs.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/bigip-system-irules-concepts-11-6-0/6.html
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