does wrt54g router have SPI?

Discussion in 'Cisco/Linksys Wireless Routers' started by badrottie, Aug 21, 2005.

  1. badrottie

    badrottie Network Guru Member

    I am curious if it have SPI where do I find it? does it enable by default?
     
  2. littlewhoo

    littlewhoo Network Guru Member

    There is not a single definition of SPI. SPI is being used as buzzword for all kinds of packet filtering/inspection above the level of simple TCP/IP routing and filtering.

    The WRT54G is using iptables for port forwarding, routing and firewall purposes. iptables has some SPI features like the --state ESTABLISHED,RELATED switch.
    http://iptables-tutorial.frozentux.net/iptables-tutorial.html

    Most thrid party firmwares like Alchemy, DD-WRT and Talisman have enhanced protcol based blocking and QOS features using L7 filters.
    http://l7-filter.sourceforge.net/
    This is also some kind of SPI.

    And the IPSec/PPTP/L2TP passthrough feature, that can be found in the webinterface is also sort of SPI.
     
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