Re: [gentoo-security] iptables window of opportunity at startup

[Oliver Schad <oliver.schad@communology.com>]

Jon Mitchell wrote:
> On Sat, 2006-02-04 at 18:22 +0100, Oliver Schad wrote:
>> No this doesn't offers a hole, when no service is running and routing
>> is 
>> deactivated. So all services have to be started after iptables rules. 
>> Same for routing.
> 
> But this isn't quite what happens by default. Starting up I seem to get
> the network, then http-replicator, then iptables. Shutting down is
> worse: First iptables is turned off, then ntpd, sshd, http-replicator,
> "unmounting network file systems", then the network. So if there were a
> problem in these services they would be exposed.
> 
> How do you control the order that programs are shutdown in gentoo?

Edit /etc/init.d/iptables and change dendency settings to
depend() {
        before net
        use logger
}

>> Iptables doesn't have to protect the TCP/IP stack but a network
>> behind 
>> the host or services on that host.
> 
> Could the network behind the host also be exposed in this small window?

No, because Routing is activated in /etc/init.d/iptables after loading
ruleset

Regards
Oli
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