keepalive message or not?

Thu, 17 Oct 2002 15:37:08 -0700


Hello all.

I remote connected my server using ssh and executed like this.

# tcpdump tcp
and I can see so lots of packets like this.

12:24:08.901473 eth0 < client.com.2157 > www.server.com.ssh: P 2801:2841(40) ack 13496 win 16736 (DF)
12:24:08.901481 eth0 < client.com.2157 > www.server.com.ssh: P 2801:2841(40) ack 13496 win 16736 (DF)
12:24:08.901483 eth0 < client.com.2157 > www.server.com.ssh: P 2801:2841(40) ack 13496 win 16736 (DF)
12:24:08.901492 eth0 < client.com.2157 > www.server.com.ssh: P 2801:2841(40) ack 13496 win 16736 (DF)
12:24:08.901498 eth0 < client.com.2157 > www.server.com.ssh: P 2801:2841(40) ack 13496 win 16736 (DF)

* client.com is my pc name.

Surely, I didn't do anything except ssh login and just tcpdump.

Is this a keepalive message or not?

Please let me know the meaning about this message.

Thanks in advance.

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