Users logged in through which NIC Post: 302072201

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Special Forums IP Networking Users logged in through which NIC Post 302072201 by buffoonix on Friday 28th of April 2006 06:59:17 PM

04-28-2006

Registered User

I am not into AIX.
So options and parameters may differ thereon.
But generally netstat should also on an AIX box
show the local IP addresses used by tcp sockets
(e.g. netstat -an)
Maybe the AIX netstat further offers an option to limit to tcp connections like GNU,
as with -t ?
You could combine this with the who command,
or if you have it on AIX, the lsof command (but I doubt it's available there).

You could also force your users on a certain NIC by using some tcp wrapper
for your network login services (e.g. telnet, rlogin etc.)
On Linux xinetd handles this automatically by conf file entries for those services.
Most commercial Unix vendors will offer a tcp wrapper for their OS free of charge
(e.g. HP-UX does)

If your users connect via SSH you could set the ListenAdress directive in
sshd_config to the IP address (viz. NIC) you want your users to connect to
(by default sshd will listen to all local up NICs)

buffoonix

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LEARN ABOUT OSF1

services

services(4)						     Kernel Interfaces Manual						       services(4)

NAME

       services - Defines the sockets and protocols used for Internet services

SYNOPSIS

       /etc/services

DESCRIPTION

       The  /etc/services  file associates Internet service names and aliases with the port number and protocol used by the service.  Each service
       is listed in this file on a single line of the form: ServiceName  PortNumber/ProtocolName  Aliases

       The fields contain the following information: The official Internet service name.  The socket port number used  for  the  service  and  the
       transport protocol used for the service.  A list of unofficial service names.

       Items on a line are separated by spaces or tabs.  Comments begin with a # (number sign) and continue to the end of the line.

EXAMPLES

       Entries	in  the  /etc/services	file for the inetd internal services might look like this: echo 	 7/tcp echo	     7/udp discard
       9/tcp	  sink null discard	  9/udp      sink null daytime	    13/tcp daytime	 13/udp  chargen       19/tcp	    ttytst  source
       chargen	    19/tcp	ttytst source ftp	   21/tcp time	       37/tcp	   timeserver time	   37/udp      timeserver

RELATED INFORMATION

       Functions: endservent(3), getservbyname(3), getservbyport(3), getservent(3), setservent(3)

       The RFC923 specification.  delim off

																       services(4)

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