> Source: [sk177808](https://support.checkpoint.com/results/sk/sk177808)

# sk177808 - Virtual session timeout does not work correctly after a policy installation

| Property | Value |
|----------|-------|
| Solution ID | sk177808 |
| Date Created | 2022-02-08 |
| Last Modified | 2022-02-10 |
| Technical Level | General |
| Products | Security Gateway, Scalable Platforms |
| Versions | R82.10, R82, R81.20, R82, R81.20 |
| OS | Gaia |

## Symptoms

- After a policy installation, the virtual session timeout of a TCP connection (for example: BGP on TCP port 179) constantly decreases until the virtual session timeout reaches 0.   

You can periodically view the virtual session timeout of a TCP connection with this expert command (example: for source IP 192.168.x.xx and destination IP 10.100.x.x) on the Security Gateway:   

`fw ctl conntab | grep 192.168.x.xx | grep 10.100.x.x`   

The virtual session timeout appears as, for example, 3198/3605, which constantly decreases.

<br />

## Cause

This issue occurs when the user sets this kernel parameter in the */var/opt/fw.boot/modules/fwkern.conf* file:  

`fwconn_rematch_udp_s2c_old_conn=1`  

**Note** : On R80.20SP Jumbo Hotfix Take 317 SGM, the user set the kernel parameter with this command:  

`g_update_conf_file fwkern.conf fwconn_rematch_udp_s2c_old_conn=1`  

<br />

## Solution

[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](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).

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