> Source: [sk182775](https://support.checkpoint.com/results/sk/sk182775)

# sk182775 - Packet loss (fwconn_key_init_links failed) for ESP packets when using User-Mode SecureXL 

| Property | Value |
|----------|-------|
| Solution ID | sk182775 |
| Date Created | 2024-10-30 |
| Last Modified | 2024-11-13 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R81.20 |

## Symptoms

- * ESP packets experience packet loss when traversing through the firewall.
* Running `fw ctl zdebug + drop` displays: `fw_log_drop_ex: Packet proto=50 x.x.x.x:0 -> x.x.x.x:0 dropped by fw_handle_first_packet Reason: fwconn_key_init_links (INBOUND) failed`.
* User-Mode SecureXL is active, confirmed via `fwaccel stat`.

## Solution

This problem was fixed. The fix is included in:

* [Jumbo Hotfix Accumulator for R81.20](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.20/Default.htm) starting from Take 90
* [Jumbo Hotfix Accumulator for R81.10](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.10/Default.htm) starting from Take 171

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://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk168597).

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