nanog mailing list archives
Re: Network Segmentation Approaches
From: Rich Kulawiec <rsk () gsp org>
Date: Wed, 6 May 2015 19:05:59 -0400
On Wed, May 06, 2015 at 03:30:01PM -0700, Scott Weeks wrote:
--- rsk () gsp org wrote: From: Rich Kulawiec <rsk () gsp org> The first rule in every firewall is of course "deny all" and subsequent rulesets permit only the traffic that is necessary. ------------------------------------ I think you got this backward? That way all traffic is blocked, so none is allowed through.
Nope, I said exactly what I intended (and what I do, in practice). Doing so forces one to understand in detail what traffic actually needs to pass in/out and to craft specific rules for it. This in turn helps avoid making mistake #1: The Six Dumbest Ideas in Computer Security http://www.ranum.com/security/computer_security/editorials/dumb/ ---rsk
Current thread:
- Re: Network Segmentation Approaches, (continued)
- Re: Network Segmentation Approaches Rich Kulawiec (May 05)
- Re: Network Segmentation Approaches Mark Andrews (May 05)
- Re: Network Segmentation Approaches Gene LeDuc (May 05)
- Re: Network Segmentation Approaches Mark Andrews (May 05)
- Re: Network Segmentation Approaches Jimmy Hess (May 05)
- Re: Network Segmentation Approaches Stephen Satchell (May 05)
- Re: Network Segmentation Approaches charles (May 06)
- Re: Network Segmentation Approaches Christopher Morrow (May 06)
- Re: Network Segmentation Approaches charles (May 06)
- RE: Network Segmentation Approaches Keith Medcalf (May 05)
- Re: Network Segmentation Approaches Joel Maslak (May 05)
- Re: Network Segmentation Approaches Scott Weeks (May 06)
- Re: Network Segmentation Approaches Rich Kulawiec (May 06)
- Re: Network Segmentation Approaches Andrew Jones (May 06)
- Re: Network Segmentation Approaches Scott Weeks (May 06)
- Re: Network Segmentation Approaches Rich Kulawiec (May 07)
- [no subject] Jimmy Hess via NANOG (May 07)
- Re: Network Segmentation Approaches Rich Kulawiec (May 07)
- Re: Network Segmentation Approaches Scott Weeks (May 06)
- Re: Network Segmentation Approaches Rich Kulawiec (May 05)