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Home > Archive > Unix Programming > December 2004 > tool to externally "zap" a TCP connection?
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tool to externally "zap" a TCP connection?
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| Chris Markle 2004-12-04, 2:52 am |
| Anyone aware of tools for any form of Linux that let you (root?) zap a TCP
connection in progress with a running application? Thinking it would be good
for testing to be able to kill (cause TCP RST?) a connection between a
client and a server from the command line on either end.
Chris
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| Juha Laiho 2004-12-05, 5:51 pm |
| "Chris Markle" <cmarkle@sendmail.com> said:
>Anyone aware of tools for any form of Linux that let you (root?) zap a TCP
>connection in progress with a running application? Thinking it would be good
>for testing to be able to kill (cause TCP RST?) a connection between a
>client and a server from the command line on either end.
One way would be to insert an iptables line filtering the session by local
and remote host addresses and local and remote ports, and having the rule
for that line to return a TCP RST.
Some separate tools certainly also exist; I'm not certain, but Ettercap
might have this functionality.
--
Wolf a.k.a. Juha Laiho Espoo, Finland
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"...cancel my subscription to the resurrection!" (Jim Morrison)
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| Martin Carpenter 2004-12-06, 7:48 am |
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"Chris Markle" <cmarkle@sendmail.com> wrote:
> Anyone aware of tools for any form of Linux that let
> you (root?) zap a TCP connection in progress with a
> running application?
Googling "TCP hijack" may provide some useful information, e.g.,
http://www.trustinginthefuture.com/faq/howto5.html
The only tools that I've seen have been windows-based, but it should be
reasonably straightforward to create something with the appropriate
knowledge and, say, libpcap.
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