2012-05-11 17:56:29 -06:00
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Using an OpenWRT router
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=======================
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You can use an off-the-shelf, OpenWRT capable wireless router,
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configuring only through the web interface. The OpenWRT setup is
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intended for smaller contests, wired or non-wired, in which
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participants can be counted on not to launch link level attacks (ARP
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or NDP). Bear in mind that the cheap consumer routers have relatively
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slow CPUs and won't stand up to high volume.
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The CTF repository includes a "router" package, which will boot a DBTL
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device as a IPv6 router complete with multicast forwarding and up to
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24 tagged VLANs (by using a managed switch). This is a better option
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for larger contests, and can better handle high-speed (Gigabit)
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traffic.
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Instructions for setting up OpenWRT
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-----------------------------------
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After installing OpenWRT:
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* Change the root password
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* Install the kmod-ipv6, radvd, and luci-app-radvd packages
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* Configure the LAN interface as 10.0.0.1/16 and
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fd84:b410:3441::1/64
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* Tell DHCP to begin at 257 after the base IP: this will assure
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all DHCP addresses are after 10.0.1.0
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* Disable router solicitations on LAN
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* Enable WPA2, with the password "correct horse battery staple"
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* Turn on router advertisements (under radvd) on LAN
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* Enable prefix fd84:b410:3441::1/54 under radvd
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This should be sufficient to bring up the router for running the
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contest. If you want to get fancy, you can scp the files in
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www in this directory, into /www on the router. This will give
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users some guidance if they accidentally browse to the router IP,
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and also disables the default redirection to luci.
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