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Testing a Rate-Based Policy

August 1, 2023

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To test a rate-based policy, you can send traffic to any virtual server to which a rate-based policy is bound.

Task overview: Testing a rate-based policy

Configure a stream selector (optional) and a rate limit identifier (required). For example:

add stream selector sel_subnet Q.URL "CLIENT.IP.SRC.SUBNET(24)"
add ns limitIdentifier k_subnet -Threshold 4 -timeSlice 3600 -mode REQUEST_RATE  -limittype smooth  -selectorName sel_subnet  -trapsInTimeSlice 8
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Configure the action that you want to associate with the policy that uses the rate limit identifier. For example:
```
add responder action resp_redirect redirect "\"http://response_site.com/\""

```
Configure a policy that uses the sys.check_limit expression prefix to call the rate limit identifier. For example, the policy can apply a rate limit identifier to all requests arriving from a particular subnet, as follows:
```
add responder policy resp_subnet "SYS.CHECK_LIMIT(\"k_subnet\")" resp_redirect

```

Bind the policy globally or to a virtual server. For example:

bind responder global resp_subnet 6 END -type DEFAULT
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In a browser address bar, send a test HTTP query to a virtual server. For example:
```
http://<IP of a vserver>/testsite/test.txt

```

At the NetScaler command prompt, type:

show ns limitSessions \<limitIdentifier\>
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Example

> sh limitsession k_subnet
1)      Time Remaining:       98 secs  Hits: 2                          Action Taken: 0
        Total Hash:    1718618  Hash String: /test.txt
        IPs gathered:
                1) 10.217.253.0
        Active Transactions: 0
 Done
>
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Repeat the query and check the limit identifier statistics again to verify that the statistics are being updated correctly.</span>

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Testing a Rate-Based Policy

August 1, 2023

Contributed by:

August 1, 2023

Contributed by:

Testing a Rate-Based Policy

Task overview: Testing a rate-based policy

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