> Source: [sk179747](https://support.checkpoint.com/results/sk/sk179747)

# sk179747 - The Security Gateway drops VoIP MGCP traffic with "dropped by fw_early_sip_nat Reason: failed to get MGCP ports;" after upgrading to R80.40 Jumbo Hotfix take 156 or 158

| Property | Value |
|----------|-------|
| Solution ID | sk179747 |
| Date Created | 2022-07-28 |
| Last Modified | 2025-02-10 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R81.10 (EOS), R81 (EOS) |

## Symptoms

- After upgrading R80.40 Jumbo Hotfix to take 156 or 158, the Security Gateway drops traffic for VOIP MGCP with this message:
"*dropped by fw_early_sip_nat Reason: failed to get MGCP ports;*"

## Cause

A change in VoIP table included in the Jumbo Hotfix causes the issue with MGCP traffic.

## Solution

This problem was fixed. The fix is included starting from:

* [Jumbo Hotfix Accumulator for R80.40](https://sc1.checkpoint.com/documents/Jumbo_HFA/R80.40/Default.htm) starting from Take 172

If you choose not to upgrade, Check Point can supply a **Hotfix** . [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 files](http://supportcontent.checkpoint.com/solutions?id=sk92739) from the Security Management Server 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 />

---

# 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