> Source: [sk119312](https://support.checkpoint.com/results/sk/sk119312)

# sk119312 - "ICMP error does not match an existing connection" log in SmartView Tracker

| Property | Value |
|----------|-------|
| Solution ID | sk119312 |
| Date Created | 2017-08-03 |
| Last Modified | 2019-01-24 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * SmartView Tracker log shows:

  `ICMP: Port Unreachable; ICMP Type 3; ICMP Code 3 message_info: ICMP error does not match an existing connection`
* Kernel debug (`fw ctl debug -m fw + conn drop vm`) shows:

  ```
  
  ;FW-1: fw_log_bad_conn_ex: reason ICMP error does not match an existing connection;
  ;fw_log_drop_ex: Packet proto=1 ... dropped by fw_first_packet_state_checks Reason: ICMP error does not match an existing connection;
  ;fw_handle_first_packet: first packet state violation (action=VANISH);
  ;fw_filter_chain: handle_first_packet returned action VANISH for new conn;
  ```

## Cause

ICMP Error packet arrives through the firewall while the original connection (For which the ICMP error was generated) did not go through the firewall. (For example, asymmetric routing).

## Solution

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