Firewall Wizards mailing list archives

Re: PIX responding with SYN+ACK to SYN+ACK probe sent on open port

From: L Cubed <lllcubed () gmail com>
Date: Tue, 11 Jan 2005 11:18:09 -0600

On Mon, 10 Jan 2005 20:47:21 +0100, Martin Mačok
<martin.macok () underground cz> wrote:
snip, snip, snip


Please, could you test sending SYN+ACK probe against an open port on
your PIX boxes and drop me a note what happens in your case? Do you
get (a) nothing (b) ICMP unreachable (c) RST or (d) SYN+ACK reply?

Howto:
% hping2 -S -A -c 1 -p <open_tcp_port> <pix>


Answer is:  A
Cisco PIX Firewall Version 6.1(4)
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Current thread:

PIX responding with SYN+ACK to SYN+ACK probe sent on open port Martin Mačok (Jan 11)
- Re: PIX responding with SYN+ACK to SYN+ACK probe sent on open port L Cubed (Jan 11)
  - Re: PIX responding with SYN+ACK to SYN+ACK probe sent on open port Martin Mačok (Jan 14)
    - Re: PIX responding with SYN+ACK to SYN+ACK probe sent on open port L Cubed (Jan 19)
- Re: PIX responding with SYN+ACK to SYN+ACK probe sent on open port L Cubed (Jan 11)
- <Possible follow-ups>
- RE: PIX responding with SYN+ACK to SYN+ACK probe sent on open port Smith, Aaron (Jan 11)
  - Re: PIX responding with SYN+ACK to SYN+ACK probe sent on open port stephane nasdrovisky (Jan 14)
    - Re: PIX responding with SYN+ACK to SYN+ACK probe sent on open port Martin Mačok (Jan 14)
    - Message not available
    - Re: PIX responding with SYN+ACK to SYN+ACK probe sent on open port Martin Mačok (Jan 14)
    - Re: PIX responding with SYN+ACK to SYN+ACK probe sent on open port Chuck Swiger (Jan 19)