This file is indexed.

/etc/dhcp/dhclient-enter-hooks.d/zentyal-dhcp-enter is in zentyal-network 2.3.13+quantal1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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set_router() {
    ebox_routers="$new_routers"
    unset new_routers
}


# Do nothing if network module is disbled
if  /etc/init.d/zentyal network status; then
    case $reason in
        BOUND)
            set_router
            ;;
        REBOOT|RENEW|REBIND|TIMEOUT)
            set_router
            ;;
        *)
            ;;
    esac
fi