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 :: Mailing Lists

[ILUG] rsh/ssh network disconnections

[ILUG] rsh/ssh network disconnections

Kenn Humborg kenn at bluetree.ie
Wed Feb 9 13:15:28 GMT 2000


> I'm having a strange problem which I hope someone can finger. I've just
> upgraded a box used as an ISDN gateway to SuSE 6.3 and rsh / ssh
> connections from it to internal / external boxes break down with a message
>
> rlogin: read: Connection reset by peer.
>
> The ssh breakdowns have the same message, minus the rlogin. It seems that
> they happen at the same time as rsh breakdowns. However, that has only
> happened twice and each time I flipped from the VC with the dead ssh to
> that with the rsh, the rsh was dead also. I suspect that the same thing
> causes both errors, but what the **** is it ?

Make absolutely sure that you don't have another machine
with the same IP address.  When this happens, all hell
breaks loose!

I've seen this:  A and B have same IP address.  I'm on
machine C.  I telnet to A.  My machine sends out an
ARP request, A answers (by luck) and the TCP connection
is opened.  After a while, the ARP entry expires and
is re-requested.  B answers this time.  The next TCP
packet from C goes to B.  B says "Hey!  I don't have an
open connection from C with that source-port/dest-port
pair" and sends back a connection reset.

Later,
Kenn






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