> Source: [sk66443](https://support.checkpoint.com/results/sk/sk66443)

# sk66443 - ICMP packets are dropped with 'message_info: ICMP reply does not match a previous request' log in SmartView Tracker

| Property | Value |
|----------|-------|
| Solution ID | sk66443 |
| Date Created | 2012-01-04 |
| Last Modified | 2026-02-10 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82 |

## Symptoms

- * SmartView Tracker shows that ICMP packets are dropped with "`message_info: ICMP reply does not match a previous request`" log.

* Traffic capture (or kernel debug) on Security Gateway indeed shows that the ID of ICMP Reply does not match the ID of ICMP Request.

## Cause

This drop is related to stateful inspection of ICMP.

Due to a mismatch between the ID of ICMP Reply and the ID of the original recorded ICMP Request, Security Gateway will not find the original ICMP Request in the Connections table (id 8158) and will drop this ICMP Reply packet as out-of-state.  

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## Solution

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