Firewall Wizards mailing list archives

Re: Router with firewall suggestion


From: "CTA" <cta () hcsin net>
Date: Sun, 15 Dec 2002 10:56:38 -0500




<color><param>0100,0100,0100</param>On 2 Dec 2002, at 15:03, Steve Bostedor wrote:


</color>From:                   "Steve Bostedor" <<Steveb () tshore com>

To:                     <<firewall-wizards () honor icsalabs com>

Subject:                [fw-wiz] Router with firewall suggestion

Date sent:              Mon, 2 Dec 2002 15:03:26 -0500


<color><param>7F00,0000,0000</param>> We have a small block of external Ip addresses being routed to us

from our broadband ISP.  They do not allow us to set the

access-lists on their edge router, so we need to put something on

our side that will filter traffic and act as a firewall for those

addresses.  Layer 3 switches look real expensive.  Any

recommendations?



Thanks!

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</color>>>>

<color><param>0100,0100,0100</param><FontFamily><param>Times New Roman</param><bigger>Get BSDi and a Pentium II/III 
class machine with two NICs, 
512M RAM, and build a Bastion Host. (Cost << $3k)  You can 
do with FreeBSD or OpenBSD, but not LINUX. Sorry but 
LINUX ‘s implementation of packet filtering is way to 
venerable. If you are really into hacking a STRONG Bastion, 
try building a BPF based filter. If you don’t know what BPF is 
then move on…


One interface to your router/Open-DMZ and the other to your 
Private or Managed DMZ


Run IPFW on both interfaces to filter IN only that traffic which 
you need. 


Setup standard IP and SMURF filters on the router. NIX FW 
on you Gateway Routers!


IMHO

</color><FontFamily><param>Arial</param><smaller> 



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