Re: Server IP controls

2004-04-13 13:00:29
Subject: Re: Server IP controls
From: Zoltan Forray/AC/VCU <zforray AT VCU DOT EDU>
Date: Tue, 13 Apr 2004 13:00:42 -0400
The connection isn't the problem. The client talks to the server (and
vice-versa) just fine, if the ports are not blocked.

I want the server to use its private subnet to talk to the client, not its
public connection.  After all, this can be forced on the client via
TCPNODEADDRESS, can the server do the same.

Yes, I believe the private network is routed since lots of systems, both
physically on the same and not in the same building, connect to the TSM
server, just fine.

"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> wrote on 04/13/2004
11:42:40 AM:

> Zoltan,
> According to RFC 1918, the following are private, non-routed subnets:
> ->
> ->
> ->
> Being non-routed you cannot connect from to
> unless you have a connection to the same physical subnet as
>  We use a private, non-routed subnet for our clients, but
> the clients are required a second NIC connected to the private,
> non-routed subnet.
> H. Milton Johnson
> Voice: (210) 677-6728
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf 
> Of
> Zoltan Forray/AC/VCU
> Sent: Tuesday, April 13, 2004 8:22 AM
> Subject: Server IP controls
> Recently, we have been reconfiguring/locking down a lot of the TCPIP
> ports in use by the TSM servers and clients, attempting to control/route
> TSM traffic across a private subnet versus the more heavily used public
> network.
> However, we have been having some TSM scheduler communications, due to
> port blocking issues. I am trying to figure out if/how the TSM server
> can be configured to control which of its 2-IP connections it uses to
> communicate with the clients.
> Here is my configuration:
> TSM AIX server.  2-IP connections,
> (primary/public) and (private).
> The TSM client in question only has 1-IP connection,
> The
> DSM.SYS (AIX) points to the server via DNS name that resolves to
> My networking person says the traffic is flowing across the 6.201
> connection, not the 20.44 private connection.
> How, if possible, can I get the TSM server to use the private 20.44
> connection to perform the backups ?  Is there some server setting that
> can control this ?
> We are trying to get another connection to the client, using the private
> subnet. Unfortunately, there aren't any available ports in the switch,
> at this time. Yes, I know that when I get the other port in the client,
> I can use the TCPNODEADDRESS options to control this.

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