From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Richard Weinberger <richard@nod.at>
Cc: Jan Engelhardt <jengelh@medozas.de>, netfilter-devel@vger.kernel.org
Subject: Re: [PATCH 0/3][RFC] Relationship between conntrack and firewall rules
Date: Fri, 21 Jan 2011 12:26:09 +0100 [thread overview]
Message-ID: <4D396D51.3070903@netfilter.org> (raw)
In-Reply-To: <201101211213.57308.richard@nod.at>
On 21/01/11 12:13, Richard Weinberger wrote:
> Am Freitag 21 Januar 2011, 11:00:48 schrieb Pablo Neira Ayuso:
>> On 21/01/11 00:02, Richard Weinberger wrote:
>>> Am Donnerstag 20 Januar 2011, 23:52:25 schrieb Jan Engelhardt:
>>>> On Thursday 2011-01-20 23:47, Richard Weinberger wrote:
>>>>> Hi,
>>>>>
>>>>> as a firewall admin I would like to see which rules allow
>>>>> the connections through my firewall.
>>>>> A relationship between conntrack and firewall rules would be nice.
>>>>> The next five patches bring this feature to the Linux Netfilter.
>>>>>
>>>>> First a small example.
>>>>> Consider this iptables rules:
>>>>> -A INPUT -m state --state ESTABLISHED,RELATED -j APPROVE --rule-id 1
>>>>> -A OUTPUT -m state --state NEW,ESTABLISHED,RELATED -j APPROVE --rule-id
>>>>> 2 -A INPUT -p tcp --dport 22 -m state --state NEW -j APPROVE --rule-id
>>>>> 3 -A INPUT -p icmp -m state --state NEW -j APPROVE --rule-id 4
>>>>>
>>>>> The APPROVE target is the same as ACCEPT but it stores also a rule id
>>>>> into the connection tracking entry.
>>>>
>>>> What about connmark? You could have used that. Perhaps combined with the
>>>> use of -j TRACE that can show which rules were processed before a
>>>> verdict was issued.
>>>
>>> Yeah, I know commark and TRACE but they are quite clumsy to use for such
>>> a purpose.
>>
>> Why are the clumsy for this purpose?
>
> Because I would need more than one iptables command to model a firewall rule.
> Or can you show me a simple iptables configuration using connmark which
> achieves the same as my APPROVE example above?
Just a couple of extra rules to restore and save the connmark. Right?
next prev parent reply other threads:[~2011-01-21 11:26 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-20 22:47 [PATCH 0/3][RFC] Relationship between conntrack and firewall rules Richard Weinberger
2011-01-20 22:47 ` [PATCH 1/3] netfilter: add ruleid extension Richard Weinberger
2011-01-20 22:47 ` [PATCH 2/3] netfilter: add APPROVE target Richard Weinberger
2011-01-20 22:47 ` [PATCH 3/3] netfilter: implement ctnetlink_dump_ruleid() Richard Weinberger
2011-01-20 22:47 ` [PATCH] iptables: Add APPROVE target Richard Weinberger
2011-01-20 22:47 ` [PATCH] conntrack: Implement ruleid support Richard Weinberger
2011-01-20 23:17 ` [PATCH 2/3] netfilter: add APPROVE target Jan Engelhardt
2011-01-20 23:22 ` Richard Weinberger
2011-01-20 23:27 ` Jan Engelhardt
2011-01-20 23:30 ` Richard Weinberger
2011-01-20 22:52 ` [PATCH 0/3][RFC] Relationship between conntrack and firewall rules Jan Engelhardt
2011-01-20 23:02 ` Richard Weinberger
2011-01-21 10:00 ` Pablo Neira Ayuso
2011-01-21 11:13 ` Richard Weinberger
2011-01-21 11:26 ` Pablo Neira Ayuso [this message]
2011-01-21 11:56 ` Richard Weinberger
2011-01-21 12:24 ` Pablo Neira Ayuso
2011-01-21 12:53 ` Richard Weinberger
2011-01-21 13:25 ` Pablo Neira Ayuso
2011-01-21 13:38 ` Richard Weinberger
2011-01-21 13:57 ` Pablo Neira Ayuso
2011-01-21 14:11 ` Richard Weinberger
2011-01-21 15:09 ` Mr Dash Four
2011-01-21 0:04 ` Mr Dash Four
2011-01-21 0:10 ` Richard Weinberger
2011-01-21 0:13 ` Mr Dash Four
2011-01-21 9:58 ` secctx support for conntrack-tools [was Re: [PATCH 0/3][RFC] Relationship between conntrack and firewall rules] Pablo Neira Ayuso
2011-01-21 9:56 ` [PATCH 0/3][RFC] Relationship between conntrack and firewall rules Pablo Neira Ayuso
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