> Source: [sk172887](https://support.checkpoint.com/results/sk/sk172887)

# sk172887 - TCP connection drops 60 min after a failover in the Security Group on Scalable Chassis / Maestro

| Property | Value |
|----------|-------|
| Solution ID | sk172887 |
| Date Created | 2021-04-05 |
| Last Modified | 2022-12-18 |
| Technical Level | General |
| Products | Scalable Platforms |
| Versions | R81.10 (EOS), R81 (EOS) |
| OS | Gaia |

## Symptoms

- * After 60 minutes of failover, TCP traffic drops with "First Packet isn't SYN". TCP session timeout is 60 minutes.
* The connections present in the new Standby member SecureXL connection table drop (fwaccel conns).
* The issue does not occur if the user reboots the Standby cluster member in the first 60 minutes after failover.

## Cause

By design, both members are active for a brief time during a failover. During this time, traffic that arrives to the previously Active member (directly or over a connection) offloads the connection again from the Firewall to the SecureXL after it was deleted.

<br />

## Solution

This problem was fixed (requires manual configuration). The fix is included starting from:

* [Check Point R81.20](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk173903)
* [Jumbo Hotfix Accumulator for R81](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81/Default.htm) starting from Take 60
* [Jumbo Hotfix Accumulator for R80.20SP](https://supportcenter.us.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk155832) starting from Take 327

If you do not wish to upgrade:  

[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, collect [CPinfo](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk92739) files from the Security Management 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).

<br />

### Configuration Instructions

These kernel parameters control the Security Group behavior:

|-------------------------------------|------------------|----------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Kernel Parameter                    | Default Value    | Accepted Values      | Description                                                                                                                                                   |
| fwha_clean_ppk_conn_on_standby      | 0 (**Disabled**) | 1, or 0              | Controls whether to clear (value 1) or not (value 0) the SecureXL connections table on the Standby Scalable Chassis / Maestro Site                            |
| fwha_clean_ppk_interval             | 600              | from 1 to 4294967295 | Controls the interval (in seconds) how frequently to clear the SecureXL connections table on the Standby Scalable Chassis / Maestro Site                      |
| fwha_local_chassis_state_correction | 1                | 1, or 0              | Controls whether to perform (value 1) or not (value 0) the traffic correction on the local Scalable Chassis / Security Group Member                           |
| fwha_local_down_correction          | 1                | 1, or 0              | Controls whether to check (value 1) or not (value 0) if the local Scalable Chassis / Security Group Member is "Down" before performing the traffic correction |

<br />

For instructions to configure kernel parameters, see the:

* [Maestro Administration Guide](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doShowproductpage&productTab=documents&product=520) for your version
* [Scalable Chassis Administration Guide](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doShowproductpage&productTab=documents&product=493) for your version

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