Snort mailing list archives
Re: Best practices for setting HOME_NET
From: Joel Esler <jesler () sourcefire com>
Date: Fri, 11 Jan 2013 18:58:59 -0500
Depends on your deployment scenario. If you have a border gateway Snort, then Kevin's suggestion is great. If you have more of an internal LAN facing Snort, then your suggestion is valid. Where it really gets fun is when you define HOME_NET and then you define EXTERNAL_NET as HOME_NET. J On Jan 11, 2013, at 6:03 PM, Mike Miller <mike () millertwinracing com> wrote:
Not necessarily. Your IDS won't alert on an internal range attacking another internal range. I've seen: ipvar EXTERNAL_NET any to be more expansive. On Jan 11, 2013, at 11:34 AM, Kevin Ross <kevross33 () googlemail com> wrote:It should be your internal network ranges or specifically the IPs or subnets you are trying to protect if you want to refine it further and consider even more to be "external". If you are really unsure you can set it as RFC 1918 addresses and then set EXTERNAL_NET to be anything not HOME_NET. i.e ipvar HOME_NET [ 10.0.0.0/8,172.16.0.0/12, 192.168.1.0/16 ] ipvar EXTERNAL_NET !$HOME_NET It is important to try and get this right so the rules are applied properly. Hope that helps, Kevin On 11 January 2013 04:02, Craig Merchant <cmerchant () responsys com> wrote: What are the best practices for setting the HOME_NET variable in an environment where multiple sensors exist at different sites or datacenters? Is it considered best to set it to a network range that encompasses all of the sites, or generally is it considered best to treat intra-site traffic as external? Thx. Craig ------------------------------------------------------------------------------ Master HTML5, CSS3, ASP.NET, MVC, AJAX, Knockout.js, Web API and much more. Get web development skills now with LearnDevNow - 350+ hours of step-by-step video tutorials by Microsoft MVPs and experts. SALE $99.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122812 _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news! ------------------------------------------------------------------------------ Master HTML5, CSS3, ASP.NET, MVC, AJAX, Knockout.js, Web API and much more. Get web development skills now with LearnDevNow - 350+ hours of step-by-step video tutorials by Microsoft MVPs and experts. SALE $99.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122812_______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!------------------------------------------------------------------------------ Master HTML5, CSS3, ASP.NET, MVC, AJAX, Knockout.js, Web API and much more. Get web development skills now with LearnDevNow - 350+ hours of step-by-step video tutorials by Microsoft MVPs and experts. SALE $99.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122812_______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!
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Current thread:
- Best practices for setting HOME_NET Craig Merchant (Jan 10)
- Re: Best practices for setting HOME_NET Joel Esler (Jan 11)
- Re: Best practices for setting HOME_NET Kevin Ross (Jan 11)
- Re: Best practices for setting HOME_NET Mike Miller (Jan 11)
- Re: Best practices for setting HOME_NET Joel Esler (Jan 11)
- Re: Best practices for setting HOME_NET Mike Miller (Jan 11)
- Re: Best practices for setting HOME_NET Joel Esler (Jan 11)
- Re: Best practices for setting HOME_NET waldo kitty (Jan 11)
- Re: Best practices for setting HOME_NET waldo kitty (Jan 11)
- Re: Best practices for setting HOME_NET Mike Miller (Jan 11)