Security Incidents: RE: Why would my machine do this?

From: Jose Nazario <jose_at_biocserver.BIOC.cwru.edu>
Date: Fri, 8 Feb 2002 12:29:32 -0500 (EST)

On Thu, 7 Feb 2002, Bill Royds wrote:

> Is one of the machines a SGI Irix machine. SGI uses port 1 for service
> multiplexing and this may be a communication from the service
> multiplexor. It can be pretty chatty with it.

1/UDP is not used by those . 1/TCP is TCPmux (RFC 1078) to multiplex
services. UDP doesn't use that TCPmux service for the same purposes.

you are right in that several SGI specific tools use TCPmux (1/TCP). but
they're TCP only.

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Received on Feb 08 2002