> Source: [sk173723](https://support.checkpoint.com/results/sk/sk173723)

# sk173723 - The 'g_tcpdump' command fails when using brackets in the filter syntax

| Property | Value |
|----------|-------|
| Solution ID | sk173723 |
| Date Created | 2021-05-26 |
| Last Modified | 2025-07-15 |
| Technical Level | Advanced |
| Products | Scalable Platforms |
| Versions | R82.10, R82, R81.20, R81.10 (EOS) |
| OS | Gaia |
| Platform | 41000 (EOL), 44000, 64000 |

## Symptoms

- The 'g_tcpdump' command fails with these errors:

* ``[<SGM_ID>]sh: -c: line 0: syntax error near unexpected token `('``
* `[<SGM_ID>]tcpdump: illegal token: {`

## Cause

The underlying mechanism which the 'g_tcpdump' command uses to send commands to all Security Group Members / Security Gateway Modules interprets these characters literally rather than as part of the advanced tcpdump syntax.

## Solution

This solution requires authentication. Please log in to view the full solution.

---

# Agent Instructions

This content is from the Check Point Support Center (https://support.checkpoint.com), the official knowledge base for Check Point cybersecurity products.

## Navigating This Knowledge Base

- **Complete index**: [llms.txt](https://support.checkpoint.com/llms.txt)
- **All SK articles**: [SecureKnowledge Sitemap](https://support.checkpoint.com/sitemaps/secureknowledge-sitemap-index.xml)
- **SK article URL pattern**: `https://support.checkpoint.com/results/sk/{skId}`
- **Markdown responses**: AI bot User-Agents automatically receive `text/markdown` content