[CentOS] Firewall frustration

Robert Moskowitz rgm at htt-consult.com
Mon Dec 31 18:56:31 UTC 2007


Matt Shields wrote:
> On Dec 31, 2007 7:58 AM, Robert Moskowitz <rgm at htt-consult.com> wrote:
>   
>> Matt Shields wrote:
>>     
>>> On Dec 31, 2007 12:13 AM, Robert Moskowitz <rgm at htt-consult.com> wrote:
>>>
>>>       
>>>> Well FWbuilder is NOT easy.  The documentation does not match the
>>>> current GUI.  Now the box is locked up.  I will have to pull it again,
>>>> hook it up to a kybd/VGA and reset iptables....
>>>>
>>>> Maybe Shoreline with webmin....
>>>>
>>>> Problem is I want a REAL router/firewall with little work.  Both public
>>>> and private nets have routable addresses.  No NATing for me!  I just
>>>> help write the RFC ;)  And all the templates for fwbuilder want you to
>>>> be using NATing.
>>>>
>>>> Perhaps I should just set up another Astaro firewall.  I have been using
>>>> Astaro since v3, so I am comfortable with it....
>>>>
>>>>
>>>>         
>>> If you've ever used a Checkpoint firewall, FWBuilder is exactly like
>>> that interface.  It even comes with a module that will let you modify
>>> Checkpoint firewalls.
>>>       
>> I noticed the later, also a PIX module. No I have not personally needed
>> that costly of a firewall.
>>
>> Full discloser time. My day job is with ICSAlabs. My area is security
>> protocols research (like setttin up the initial IPsec certification
>> criteria), but when I visit the labs there are all those firewall
>> products up and running.... So, yeah, I know checkpoint. I talk with the
>> gang over in the labs about 'simple' firewalls, but there are only
>> certain things the boss funds here. So then I have to go cheap.
>>
>>     
>
> If you're running a single firewall, then maybe FWBuilder isn't for
> you, although it will do what you want.  The real benefit of FWBuilder
> is when you have more than one firewall in your network and you want
> to use common objects to to simplify maintaining rules.
>
> For example, the company I work for has 4 datacenters, plus a number
> of leased servers (like Rackspace).  At each of the datacenters we
> have at least 1 pair of redundant firewalls.  On all our firewalls we
> have common rules to allow traffic from every other datacenter/server
> that we own.  So we define an object for each datacenter, the object
> is a subnet.  Then we define a group called datacenters which includes
> all the previous subnets objects.  Then when building a new firewall
> we just include the same rule that says from datacenters allow all.
>
> If we add a new datacenter or leased server, we add a new subnet
> object and include it in the datacenter group.  We then just recompile
> and redeploy each of the firewalls without having to add anything to
> the firewalls, because they already have the datacenter rule.
>
> When you maintain a large network you really see the benefit of
> FWBuilder.  If you're running Windows there is a $50 license fee, but
> for those people who are network admins but do not like Linux on the
> desktop it's well worth the price for the Windows license.
I saw that about fwbuilder. Going to have to ask the crew back in the 
labs about it.

But, yes. I 'run' a research facility out of my house. I have to pay the 
electric bill, never convinced the boss to allow me to expense it; they 
have bought some of my equip and pay for part of the ISP cost. So as a 
lab, I have need for flexiblity, not replicatiblity. Also I might be at 
a conference and need to get something up running on one of the 
notebooks I travel with....





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