# Connectivity issues in Maestro Security Group X with hosts in the network of 198.51.10x.0 / 24

**Product**: Maestro HyperScale Firewall  
**Version**: R80.20SP (EOS), R81 (EOS), R81.10 (EOS), R81.20, R82, R82.10  
**OS**: Gaia  
**Last Modified**: 2025-10-12

## Symptoms

- In Security Group X (example: Security Group 1), it is not possible to configure an interface with an IP in the network of 198.51.10x.0 / 24.
- In Security Group X (example: Security Group 1), there are connectivity issues with hosts in the network of 198.51.10x.0 / 24.

## Cause

In versions lower than R80.20SP Jumbo Hotfix Accumulator Take 327, the start of CIN interfaces for IP ranges is hardcoded to be 198.51.10x.0 / 24, where <x> is the Security Group ID.  
Examples: 198.51.101.X, 198.51.102.X, 198.51.103.X, and so on.

## Solution

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#### NOTE

This solution has been verified for the specific scenario, described by the combination of Product, Version and Symptoms. It may not work in other scenarios.

## Article Properties

**Access Level**: Advanced  
**Status**: Approved by TAC  
**Date Created**: 2022-05-09  
**Last Modified**: 2025-10-12