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