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Intrusion Prevention System
Initial Release
The UniFi Intrusion Prevention System / Intrusion Detection System was released to general availability as a beta feature in the UniFi 5.7.20 stable release, with accompanying USG firmware release 4.4.18. IPS/IDS is supported on on the UniFi Security Gateway, the UniFi Security Gateway Pro 4, and the UniFi Security Gateway XG 8.
Performance
IPS/IDS features disable hardware offload, which reduces performance as described in the Warning on the IPS page of the UniFi Settings. With hardware offload disabled, routing between LAN or VLAN interfaces in a configuration with multiple internal networks is also reduced to the aforementioned stated non-offloaded maximum throughput.
IPS / IDS Categories
The types of activities that can be detected are largely based on the categories as listed in the ETPro Category Descriptions.