> Source: [sk184450](https://support.checkpoint.com/results/sk/sk184450)

# sk184450 - Traffic drop with error: "Rulebase Internal Error"

| Property | Value |
|----------|-------|
| Solution ID | sk184450 |
| Date Created | 2025-12-17 |
| Last Modified | 2026-09-11 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R81.20 |

## Symptoms

- * After installing a new policy, all or most traffic is dropped with the error: "`Rulebase Internal Error`" in SmartConsole logs.

* Users cannot access services such as DNS, HTTP, and HTTPS immediately after the policy push.

* Running Unified policy debugs (see [sk120964](https://support.checkpoint.com/results/sk/sk120964)) show messages similar to:  
  :
  NO MATCH drop due to match on possible syn  

  For example:  
  `
  [vs_0];[tid_1];[fw4_1];1:[10.11.x.x:35084 -> 192.168.y.y:80] [SID: 11402301] {connection} [ERROR]: up_rulebase_should_drop_possible_on_SYN: conn dir 0, 10.11.x.x:35084 -> 192.168.y.y:80, IPP 6 required_4_match = 0x3002, not expected required_4_match = 0x3000;`

## Cause

The Security Policy contains rules referencing VPN communities or objects. When these rules are installed on Security Gateways without the VPN Software Blade enabled, the gateway cannot process them and drops matching traffic.

## Solution

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

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