Penetration Testing mailing list archives
Re: A tool for crafting ESP packets
From: "Nelson Brito" <nelson () tw-award com>
Date: Tue, 25 Sep 2001 17:31:27 -0300
: Loki wrote: : : > Also, AH isn't a "packet" it : > provides authentication mechanisms for IP datagrams and protection against : > replay attacks. So, AH and ESP is a packet, in "IPSec Securing VPNs" from RSA Press, the author Carlton R. Davis shays: pg. 199: "In tunnel mode AH is inserted before the original IP header and a new IP header is inserted in front of the AH." So, you'll see this "PACKET" like a "AH PACKET", am I wrong? I don't think so. See the diagrams: IPv4 Header before applying AH: [variable-length] [transport protocol] [transport protocol] [ option filed ] [ header ][ data ] IPv4 Header after apllying AH: [new IP Header] [ authentication ] [original IP header] [TPH] [TPD] [ option field ] [header, a.k.a AH] [ option field ] [ ] [ ] : Then "ESP" isn't really a packet either, since it's just the encrypted : payload. By the way, you can have a "AH" packet i.e. Good point of view. ;-) : Just my $0.02 on this. Send me the number of yours Bank account. ;-) Sem mais, -- # Nelson Brito # Security Consultant and Penetration Tester while(<>){split(//, $_); print reverse @_;} ---------------------------------------------------------------------------- This list is provided by the SecurityFocus Security Intelligence Alert (SIA) Service. For more information on SecurityFocus' SIA service which automatically alerts you to the latest security vulnerabilities please see: https://alerts.securityfocus.com/
Current thread:
- A tool for crafting ESP packets Loki (Nov 24)
- Re: A tool for crafting ESP packets Nelson Brito (Nov 24)
- Re: A tool for crafting ESP packets Loki (Nov 24)
- Re: A tool for crafting ESP packets Emre Yildirim (Nov 26)
- Re: A tool for crafting ESP packets Nelson Brito (Nov 26)
- Re: A tool for crafting ESP packets Loki (Nov 26)
- Re: A tool for crafting ESP packets Loki (Nov 24)
- Re: A tool for crafting ESP packets Nelson Brito (Nov 24)
- <Possible follow-ups>
- Re: A tool for crafting ESP packets samsi data (Nov 26)
- Re: A tool for crafting ESP packets Loki (Nov 26)
- RE: A tool for crafting ESP packets amok (Nov 28)
- RE: A tool for crafting ESP packets Jose Nazario (Nov 29)