On Sun, 06 May 2001, Ofir Arkin wrote: > The first ICMP Echo request sent from the Microsoft NT 4 based machine was > sent with IP ID of 28416. The second ICMP Echo request was sent with IP ID > value of 28672. Simple calculation will show a gap of 256 between the IP ID > field values. And some simple thinking will show that this is because they send out a little endian value that is incremented. > Looking at the replies the LINUX based machine produced, we see a gap of 1 > between one IP ID to the next. And OpenBSD is random. So is Linux if you use my patch (shameless plug) at http://synscan.nss.nu (for 2.2.16 but should patch against 2.2.18, probably). Predictable IP.ids are used in ipidscan (mine) and idlescan (someone elses), both released in Dec 2000. ipidscan has a flag (-e) for using against windows. Check out posts from antirez in Dec 1998 and posts on this topic in Dec 1999.
This archive was generated by hypermail 2b30 : Thu May 10 2001 - 23:57:21 PDT