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Date:      Thu, 28 May 1998 01:09:44 +0800
From:      Peter Wemm <peter@netplex.com.au>
To:        John Hay <jhay@mikom.csir.co.za>
Cc:        grog@lemis.com (Greg Lehey), FreeBSD-current@FreeBSD.ORG
Subject:   Re: select: protocol failure in circuit setup 
Message-ID:  <199805271709.BAA03536@spinner.netplex.com.au>
In-Reply-To: Your message of "Sat, 27 May 1998 16:21:05 %2B0200." <199805271421.QAA07706@zibbi.mikom.csir.co.za> 

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John Hay wrote:
> > Anybody seen this message?  
> > 
> > select: protocol failure in circuit setup
> > 
> > Since the last build (about 2 days ago), it happens when I do a
> > 
> > $ rsh localhost echo foo
> > 
> 
> Do you have ipfw or something similar in use?

It's a setup failure for rcmd(3) in libc.  Basically what happens is that
the outbound connection (from rsh to rshd) causes a reverse direction
connection from rshd back to rsh for the control and stderr backchannel.
All these are supposed to be checked for privileged ports, etc etc.  I 
don't remember all that well, but it's something like that.

ipfw is a likely suspect if it's filtering incoming connections to 
reserved ports etc.

> John
> -- 
> John Hay -- John.Hay@mikom.csir.co.za

Cheers,
-Peter
--
Peter Wemm <peter@netplex.com.au>   Netplex Consulting



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