> Source: [sk184292](https://support.checkpoint.com/results/sk/sk184292)

# sk184292 - ARPING fails in SecureXL UPPAK mode

| Property | Value |
|----------|-------|
| Solution ID | sk184292 |
| Date Created | 2025-11-07 |
| Last Modified | 2026-07-23 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |
| Platform | 9000, LightSpeed QLS, 3900, 19000, 29000 |

## Symptoms

- * The `ARPING` command on the security gateway returns this output: *Sent 4 probes* *Received 0 response*
* The ARP and ping commands work normally, and ARP replies are visible in packet captures.
* When SecureXL mode is changed from UPPAK to KPPAK, ARPING works as expected.

## Cause

The ARPING utility does not work in SecureXL UPPAK mode because of a limitation in how ARP traffic is processed and displayed. When the target IP address already exists in the ARP table, UPPAK mode does not show ARPING responses as expected.  

Although ARP requests and replies are visible in packet captures and normal traffic is unaffected, the ARPING output remains empty. This issue appeared after migrating to new hardware and upgrading to R81.20 or later, and it persists across multiple Jumbo Hotfix Accumulator takes. Switching SecureXL to KPPAK mode resolves the problem, confirming that the limitation is specific to UPPAK mode.  

**Note:**Starting in R82.10, SecureXL supports only UPPAK mode.

## Solution

This problem was fixed. The fix is included in:

* [Jumbo Hotfix Accumulator for R82.10](https://sc1.checkpoint.com/documents/Jumbo_HFA/R82.10/Default.htm) starting from Take 36
* [Jumbo Hotfix Accumulator for R82](https://sc1.checkpoint.com/documents/Jumbo_HFA/R82/Default.htm) starting from Take 118
* [Jumbo Hotfix Accumulator for R81.20](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.20/Default.htm) starting from Take 158

If you choose not to upgrade, Check Point can supply a **Hotfix** . [Contact Check Point Support](https://www.checkpoint.com/support-services/contact-support/) to get a Hotfix for this issue.  
A Support Engineer will make sure the Hotfix is compatible with your environment before providing the Hotfix.  
For faster resolution and verification, please collect [CPinfo files](http://supportcontent.checkpoint.com/solutions?id=sk92739) from the Security Management Server and Security Gateways involved in the case.

**Hotfix installation instructions:**   
Refer to [sk168597 - How to install a Hotfix](https://support.checkpoint.com/results/sk/sk168597).

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