(Attached below is a post that didn't make it to the list)

Thanks everyone for the input.
Sorry for my bad phrasing, I did intend to replay a TCP session without involving my TCP stack.
Till now, I was using tcpreplay and iptables for the job, however this still leaves the ISN problem.

Does anyone know perhaps of a commercial tool that automatically (userland..) calculates the ISN & Checksums? I believe I read somewhere that Hailstorm might do the job.
Any input appreciated, thanks for all the help.

Cynic.

--- "David Fried" <dfriedll.mit.edu> wrote:
>Cynic,
>
>See if this is what you want -
>
>Netpoke is a utility used to replay packets to a live network that were
>previously captured with the tcpdump program. It attempts to match the
>timing of the original traffic, optionally speeding it up or slowing it
>down, and can also modify the network hardware address in the replayed
>traffic. Netpoke supports multiple network interfaces allowing replayed
>packets to by injected into different points on a network based on the
>source address.
>
>http://www.ll.mit.edu/IST/ideval/tools/tools_index.html
>
>Dave Fried
>
>-----Original Message-----
>From: Cynic [mailto:cynicprogrock.com]
>Sent: Wednesday, October 30, 2002 9:34 AM
>To: vuln-devsecurityfocus.com
>Subject: Retransmissions while blocking TCP Stack's RST?
>
>
>Hi,
>
>I am looking for an application for *NIX, that can replay captured packets,
>while dropping, the TCP Stacks responses.
>Let's assume I replay a SYN, and receive a SYN-ACK, my host's TCP Stack
>immediatley replies with a RST since it was not aware a connection was to be
>opened.
>So I am looking for some low-level retransmission application for *nix such
>as Network monitor for NT. (I believe it does this.)
>
>Thanks a lot!
>
>Cynic.
>
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