Security Basics mailing list archives
RE: Deep Inspection Firewall / IPS
From: "Serge Vondandamo" <serge.vondandamo () orange fr>
Date: Wed, 29 Oct 2008 18:15:40 +0100
I will advice to start using Cisco NBAR (if you are running a cisco network) for that purpose. Given the budget issues, I don't think you will easily get money to buy out an IPS. By using a combination of NBAR and QoS features you can achieve that with the gear you already have in the network. Just be care full to upgrade memories on your boxes or turn off some unnecessary services before turning these technologies on. Cheers, Serge Vondandamo, CISSP, CCNA Sr. Security Analyst -----Original Message----- From: listbounce () securityfocus com [mailto:listbounce () securityfocus com] On Behalf Of Tony Raboza Sent: Wednesday, October 29, 2008 2:16 PM To: security-basics () securityfocus com Subject: Deep Inspection Firewall / IPS Hi, I'm trying to get my company to buy a firewall with deep-inspection capabilities or IPS. From my research what is really needed is a deep inspection firewall/IPS - because a stateful packet inspection will not do. For example for a web server - you close off all the ports except port 80 /443 (http/https). But threats/malware can come in through port 80 disguising itself as normal http traffic, so we need a firewall which would inspect this - hence the need for deep packet inspection/IPS. But what if we also do NAT? Can malware still come in through port 80? I've been reading this - "Red Hat 8 Compromise" - http://honeyblog.org/junkyard/reports/redhat-compromise.pdf , but my thought on this one is that if the honeypot RH8 was NATted could the attacker have opened up a shell which might either be port 22 (ssh) or 23 (telnet)? What if only port 80/443 was port-forwarded? Can the attacker open up a shell? Questions: 1. Am I correct in my statements above? 2. If I am correct - can you give me real-world examples of exploits that come in through port 80/port 443 which can compromise a Unix/Linux webserver as well as a Windows web server? Thanks, Tony
Current thread:
- Deep Inspection Firewall / IPS Tony Raboza (Oct 29)
- Re: Deep Inspection Firewall / IPS Adriel Desautels (Oct 29)
- RE: Deep Inspection Firewall / IPS Abimbola, Abiola (Oct 29)
- RE: Deep Inspection Firewall / IPS Serge Vondandamo (Oct 29)
- RE: Deep Inspection Firewall / IPS Bryan S. Sampsel (Oct 29)