ADC

Diameter Support for Responder

September 14, 2021

Contributed by:

S S

The Responder feature now supports the Diameter protocol. You can configure Responder to respond to Diameter requests as it does HTTP and TCP requests. For example, you could configure Responder to respond to requests from a specific Diameter origin with a redirect to a web page enhanced for mobile devices. A number of Citrix ADC expressions have been added that support examination of the Diameter header and the attribute-value pairs (AVPs). These expressions support lookup of specific AVPs by index, ID or name, examine the information in each AVP, and send an appropriate response.

To configure Responder to respond to a Diameter request:

At the command prompt, type the following commands:

add responder action <actname> RESPONDWITH "DIAMETER.NEW_REDIRECT(\"aaa://host.example.com\")"

For <actname>, substitute a name for your new action. The name can consist of from one to 127 characters in length, and can contain letters, numbers, and the hyphen (-) and underscore (_) symbols. For aaa://host.example.com, substitute the URL of the diameter host to which you want to redirect connections.
add responder policy <polname> “diameter.req.avp(264).value.eq("host1.example.net")” <actname>

For <polname>, substitute a name for your new policy. As with <actname>, the name can consist of from one to 127 characters in length, and can contain letters, numbers, and the hyphen (-) and underscore (_) symbols. For host1.example.net, substitute the name of the originating host of the requests that you want to redirect. For <actname>, substitute the name of the action that you just created.
bind lb vserver <vservername> -policyName <polname> -priority <priority> -type REQUEST

For <vservername>, substitute the name of the load balancing virtual server to which you want to bind the policy. For <polname>, substitute the name of the policy you just created. For <priority>, substitute a priority for the policy.

Example:

To create a Responder action and policy to respond to Diameter requests that originate from “host1.example.net” with a redirect to “host.example.com”, you could add the following action and policy, and bind the policy as shown.

> add responder action act_resp-dm-redirect RESPONDWITH "DIAMETER.NEW_REDIRECT(\"aaa://host.example.com\")"
Done

> add responder pol_resp-dm-redirect "diameter.req.avp(264).value.eq(\"host1.example.net\")" act_resp-dm-redirect
Done

> bind lb vserver vs1 -policyName pol_resp-dm-redirect -priority 10 -type REQUEST
Done
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Diameter Support for Responder

September 14, 2021

Contributed by:

S S

September 14, 2021

Contributed by:

S S

Diameter Support for Responder

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