Alternatives to AhnLab AIPS

OPNsense

Community Edition may suit users seeking a self-hosted firewall and routing platform on x86-64.

IPFire

IPFire suits individuals, businesses, and organizations that need a self-hosted firewall for networks ranging from home offices to larger deployments.

OSSEC

OSSEC suits teams that need host and network-component monitoring across multiple operating systems, including log, file-integrity, and policy checks.

NG Firewall suits organizations seeking network security and management capabilities across hybrid deployments.

Wazuh may suit individuals and organizations of different sizes seeking endpoint, cloud, and network security monitoring.

SELKS

SELKS may suit small-to-medium organizations, as well as practitioners, researchers, educators, students, and hobbyists exploring Suricata.

It suits organizations managing security and compliance across cloud and datacenter environments, including those with legacy systems or operational technology.

pfSense may suit home and remote workers, businesses, government, education, and service providers.

Suricata

Suricata suits home, corporate, and government users, as well as developers, researchers, and third-party tooling developers who need network detection or monitoring.

Forcepoint Next Generation Firewall

It is aimed at large enterprises, campus networks, data centers, offices, branches, remote sites, and stores.

SMC suits organizations managing multi-site networks built around SNS firewalls, particularly teams that need centralized policy, VPN, firewall, or SD-WAN administration.

It suits Linux or self-hosted users who need TCP port-scan detection and packet-capture choices.

It suits organizations managing Juniper SRX environments across on-premises, cloud, or hybrid infrastructure.

It suits organizations seeking centralized network security for branches, campuses, or data centers.