# Configuring Proxy ARP for Manual NAT

**Product**: ClusterXL, Maestro HyperScale Firewall, Scalable Chassis, Security Gateways, VSX (Traditional)

**Version**: R80.40 (EOS), R81 (EOS), R81.10 (EOS), R81.20, R82, R82.10

**OS**: Gaia

**Last Modified**: 2026-04-23

## Symptoms

- After creating a Manual Static NAT rule, Security Gateway does not answer the ARP Requests for the Static NATed IP address that was configured in the Manual NAT rule.
- Security Gateway replies to ARP requests with a wrong MAC address, mostly for the NAT traffic.

## Solution

#### 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**: 2004-11-11

**Last Modified**: 2026-04-23