Viewing established tcp connections

Joe Holden joe at
Tue Jan 16 13:01:12 UTC 2007

Ricardo Nabinger Sanchez wrote:
> On Tue, 16 Jan 2007 12:06:36 +0000
> Joe Holden <joe at> wrote:
>> I'm after a tool to view tcp sessions passing through a router, however 
>> dsniff is marked as BROKEN. Are there any alternatives?
> If you don't need to inspect the sessions, netstat can show you that:
> % netstat -p tcp -n
> Active Internet connections
> Proto Recv-Q Send-Q  Local Address          Foreign Address        (state)
> tcp4       0      0         ESTABLISHED
> tcp4       0      0     ESTABLISHED
> tcp4       0      0    ESTABLISHED
> tcp4       0      0     ESTABLISHED
> Otherwise, you can still use tcpdump:
> # tcpdump -n tcp
> You can even use a SNMP daemon and query TCP-MIB if you don't want ssh
> sessions.
> I couldn't infer details about what you really want to do, and feel like
> these suggestions are not what you're looking for (YMMV), although they work
> very well for my needs.
Hi, I was looking into using tcpdump, but I was really after something 
that outputs the session in readable format.  I used to use a port that 
would output the session, ie; an IRC session, it would output all the 
NICK changes etc, that was sent between client/server.  Can't for the 
life of me remember what it was called.


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