codekasten/web-splash/web-splash.conf

# this file is not parsed, but simply sourced

# the source interface (only these packets will be filtered)
IF_SRC=eth1

# the server where all first packets get redirected to (on most
# embedded systems it should be an IP address instead of a name)
SPLASH_SERVER=192.168.1.1

# name of the local file that should be displayed by the cgi
SPLASH_DOCUMENT=/test/splash-page.html

# templates for the rules to manage forwarding rules (_IP_ will be substituted by the host's IP)
RULE_ADD='$IPT -t nat -I $CHAIN_FORWARD_CHECK -s _IP_ -j $CHAIN_FORWARD_ACTION'
RULE_DEL='$IPT -t nat -D $CHAIN_FORWARD_CHECK -s _IP_ -j $CHAIN_FORWARD_ACTION'

# the iptables chain, that contains all forwarded ips
CHAIN_FORWARD_CHECK=web_splash_forward_check
CHAIN_FORWARD_ACTION=web_splash_forward_action
CHAIN_REDIRECT=web_splash_redirect

# the iptables action for bad packets (e.g. DROP or REJECT)
REJECT_ACTION=DROP

# the location of the iptables program
IPT=/sbin/iptables
[ ! -x "$IPT" ] && IPT=/usr/sbin/iptables