RE: [hobbit] Servers (and clients) with multiple IPs ?

["Ward, Martin" <Martin.Ward (at) colt.net>]

Presumably when a 171.x.x.x Xymon client wants to talk to the Xymon
server, which has a 2.x.x.x address, the client routes its packets to
the firewall which then routes them back to the server, this is standard
packet routing. You will need to ensure that you have firewall rules in
place to allow this though...
 
Alternatively if you have a spare interface on your Xymon server you
could configure that with a 171.x.x.x address, connect it into a
convenient switch and have the 171. clients send to that address
instead. The clients will still be referred to by their 171. address in
the server's bb-hosts file, you are simply stopping packets routing to
the firewall and back. I do something similar with my Xymon server and
clients.
 
HTH
 
|\/|artin

	-----Original Message-----
	From: David Masterson (damaster) [mailto:damaster (at) cisco.com] 
	Sent: 12 February 2009 19:04
	To: hobbit (at) hswn.dk
	Subject: [hobbit] Servers (and clients) with multiple IPs ?
	
	
	In my environment, we have a lab where all the systems are on
the 2.x.x.x subnet.  This subnet is firewalled such that it's not
visible to the rest of the company.  However, there are some systems in
the lab that have 171.x.x.x IPs and the firewall translates those IPs to
the appropriate 2.x.x.x IP so that communications can be established out
of the lab.  Effectively, these systems have two IP addresses.  In fact,
I've put Xymon on several of these systems (including the Xymon server).
	 
	While I was setting up Xymon clients that were just in the lab,
there was no problem as I'd just identify all the systems by their
2.x.x.x IP.  My question, though, is how to configure things on clients
that are outside the lab.  Obviously, when I configure the outside
clients, I'll have to identify the server by it's 171.x.x.x IP.  The
server, though, is identified by its 2.x.x.x IP in the bb-hosts file.
Will this be a problem? Are there any gotchas to watch out for?
	 
	David Masterson
	 


	Taglocity <http://www.taglocity.com>  Tags: Systems, SysMgmt,
SystemMonitor, XYmon



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