Security Basics mailing list archives
RE: Basic firewall filtering question
From: "Gallina, Michael" <gallina () ocjs ohio gov>
Date: Mon, 26 Jul 2004 14:27:29 -0400
If it's a local (Personal) firewall, then you would want to eliminate brodcasts on those ports. For example, you could create a deny rule for 192.168.0.255 on ports 137 and 139 (assuming a 192.168.0.x network). This way, the machine isn't notifying anyone on the network about its presence. -Michael -----Original Message----- From: Ferino Mardo [mailto:RMardo () ALJOMAIHBEV com] Sent: Saturday, July 24, 2004 8:47 AM To: security-basics () securityfocus com Subject: Basic firewall filtering question If a personal firewall is installed in a PC connected to a Win2K LAN, netbios is allowed by allowing ports 137 to 139 in both directions. How does one define a rule such that: 1. active directory authentication/browsing works While at the same time making the PC invisible to the rest of the LAN users? TIA. ------------------------------------------------------------------------ --- Ethical Hacking at the InfoSec Institute. Mention this ad and get $545 off any course! All of our class sizes are guaranteed to be 10 students or less to facilitate one-on-one interaction with one of our expert instructors. Attend a course taught by an expert instructor with years of in-the-field pen testing experience in our state of the art hacking lab. Master the skills of an Ethical Hacker to better assess the security of your organization. Visit us at: http://www.infosecinstitute.com/courses/ethical_hacking_training.html ------------------------------------------------------------------------ ---- --------------------------------------------------------------------------- Ethical Hacking at the InfoSec Institute. Mention this ad and get $545 off any course! All of our class sizes are guaranteed to be 10 students or less to facilitate one-on-one interaction with one of our expert instructors. Attend a course taught by an expert instructor with years of in-the-field pen testing experience in our state of the art hacking lab. Master the skills of an Ethical Hacker to better assess the security of your organization. Visit us at: http://www.infosecinstitute.com/courses/ethical_hacking_training.html ----------------------------------------------------------------------------
Current thread:
- Basic firewall filtering question Ferino Mardo (Jul 26)
- Re: Basic firewall filtering question Gethin Jones (Jul 26)
- Re: Basic firewall filtering question mike (Jul 26)
- <Possible follow-ups>
- RE: Basic firewall filtering question Gallina, Michael (Jul 27)
- RE: Basic firewall filtering question Ferino Mardo (Jul 28)
- RE: Basic firewall filtering question Ferino Mardo (Jul 29)