Snort mailing list archives
Re: TCP reserved flags: which is it?
From: John Sage <jsage () finchhaven com>
Date: Mon, 22 Jul 2002 00:00:28 -0700
On Sun, Jul 21, 2002 at 03:55:30PM +1000, Chris Keladis wrote:
Hi John, The flags represent the same. It just seems like ACID prints them out in a different order. You still have reserved flags 1 and 2 set, regardless if you read them as 2 and 1.
OK: So "1" represents "..The CWR flag is assigned to Bit 8 in the Reserved field of the TCP header.." And "2" represents "..Bit 9 in the Reserved field of the TCP header [and] is designated as the ECN-Echo flag.." (ftp://ftp.isi.edu/in-notes/rfc2481.txt - which was obsoleted by ftp://ftp.isi.edu/in-notes/rfc3168.txt) or, 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+ | | | C | E | U | A | P | R | S | F | | Header Length | Reserved | W | C | R | C | S | S | Y | I | | | | R | E | G | K | H | T | N | N | +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+ (ftp://ftp.isi.edu/in-notes/rfc3168.txt) OK? Cool. - John -- "Obviously, we do not want to leave zombies around." PGP key http://www.finchhaven.com/pages/gpg_pubkey.html Fingerprint FE 97 0C 57 08 43 F3 EB 49 A1 0C D0 8E 0C D0 BE C8 38 CC B5 ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ 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://www.geocrawler.com/redir-sf.php3?list=snort-users
Current thread:
- TCP reserved flags: which is it? John Sage (Jul 17)
- Win32 - libpcap questrion Anonymous - Mike (Jul 18)
- Re: Win32 - libpcap questrion Erek Adams (Jul 18)
- Re: TCP reserved flags: which is it? John Sage (Jul 20)
- Re: TCP reserved flags: which is it? Phil Wood (Jul 21)
- Re: TCP reserved flags: which is it? John Sage (Jul 21)
- Re: TCP reserved flags: which is it? Phil Wood (Jul 22)
- Re: TCP reserved flags: which is it? John Sage (Jul 22)
- Re: TCP reserved flags: which is it? Phil Wood (Jul 21)
- Win32 - libpcap questrion Anonymous - Mike (Jul 18)
- Re: TCP reserved flags: which is it? John Sage (Jul 21)
- Re: TCP reserved flags: which is it? John Sage (Jul 22)