How We Test SPI+NAT Routers. how we test spi. Some consumer-focused routers have for some time claimed to use Stateful Packet Inspection (SPI) in their firewalls. But the recent generation of boxes based on the ADMtek 5106 Home Gateway Controller, (which was...

avg) 2 WAN-LAN SPI disabled on 6.75 118 (avg) 3 LAN-WAN SPI enabled (defaults) off 10.7 74 (avg) 4 LAN-WAN SPI enabled (defaults) on 2.4 74 (avg) 5 LAN-WAN SPI disabled on 9.0 88 (avg) 6 LAN-WAN SPI disabled off 13.6 58...

• -Firewall, Port Mapping, Filters

2 WAN-LAN SPI disabled on 34.0 1 (avg) 3 LAN-WAN SPI enabled (defaults) off 16.6 48 (avg) 4 LAN-WAN SPI enabled (defaults) on 12.2 65 (avg) 5 LAN-WAN SPI disabled on 20.2 1 (avg) 6 LAN-WAN SPI disabled off 32.3 1 (avg) I...

• -Firewall, Port Mapping, & Filters

IxChariot usually has difficulty returning test results through NAT+SPI firewalls. So we typically also disable SPI if the router firewall settings allow this. Although early NAT+SPI routers showed significant performance differences when SPI was disabled,...

NAT-based products. It's also difficult for the average purchaser of a router to verify actual SPI operation. On a practical basis, however, it's not so much a matter of NAT vs. SPI, but a question of the feature set you desire. "SPI" based consumer routers...

Inspection (SPI) that your router's firewall is supposed to have. That sounds like it can be a big help, right? Unfortunately, the SPI that's included in consumer routers doesn't really make you more secure, and in fact, can mess up some applications that...

better-tuned SPI performance, however, because I didn't see any real throughput difference with the SPI Firewall features enabled or disabled. Other routers show a definite hit in WAN-LAN performance with SPI kicked in. UDP testing didn't reveal any hiccups...

• -Firewall, Port Mapping & Filters