Re: solaris rshd question

From: Neil W Rickert (rickert+nn_at_cs.niu.edu)
Date: 03/21/05 

Date: Mon, 21 Mar 2005 17:59:25 +0000 (UTC)

David Mathog <mathog@caltech.edu> writes:

>When an rsh command is sent from Linux to Solaris 8 the Sun's
>rshd does something odd which causes the firewall on the linux
>machine to block the rest of the transaction. Turning off the
>firewall allows rsh to work. Here's what tcpdump on the
>linux side shows:

>[details snipped]

>That last packet is the problem. Neither 856 on the Sun side nor 1021
>on the linux side have been used previously _from the linux side_ so
>the linux firewall blocks that packet from the sun and that's all she
>wrote.

rsh opens a secondary connection for diagnostic output (stderr). You
are seeing the first step in setting up that secondary connection.

        man rcmd

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