Networker

[Networker] clients and NAT

2007-06-12 10:23:34
Subject: [Networker] clients and NAT
From: Rick Pim <rick AT POST.QUEENSU DOT CA>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Tue, 12 Jun 2007 10:19:40 -0400
thanks to all that responded.

Lars Hecking writes:
 >  Underscores in hostnames are illegal as far as DNS is concerned. Although
 >  I doubt that this is the root of the problem.

they are indeed. this 'workaround' was thrown in in a hurry when
someone bought a shiny new load balancer without telling anyone it
NAT-ed everything behind it and so immediately broke all the
backups. when we found something that worked we just stopped. i've
been meaning to change the underscores for a long time. maybe
today. sigh. (i haven't been overly worried because my networker
server doesn't use the DNS to find clients; all client names and IPs
are in the local hosts file. and the 'alt' addresses are nowhere BUT
the hosts file.)

Conrad Macina writes:
 > 7.x has much stricter client requirements than 6.x did. Essentially, every
 > interface on a client system must be defined to NetWorker as an alias.
 > 
 > I think you may be confusing the Remote Access and Alias fields. Remote
 > Access had to do with restores; it defines which other systems are allowed
 > to restore data from a client. Try adding clove_alt.its as an Alias in the
 > client definition.

me? confused? more than likely. as mentioned above, the original problem
happened suddenly with no warning and we were scrambling for a solution.
this was just the first one that we found. in 6.x server, it was
sufficient to:
  - add host-nat-name to /etc/hosts
  - add root@host-nat-name to "Remote Access"

this worked. i recognize that Remote Access has to do with restores,
but under 6.x server it also permitted backups in this situation to
work. (i'm not claiming that this is a Good Thing, just that it
worked.)

as conrad indicates, under 7.2.2, it seems to be sufficient to stick
host-nat-name into the Aliases field in the client definition. this is
certainly cleaner and doesn't 'overload' a field that's supposed to be
just for restores. (it sort of isn't an Alias, though. heck, the client
doesn't even know about it.)

many thanks to all that responded. now i have to upgrade all
the clients....

rp
rick pim                                           rick AT post.queensu DOT ca
information technology services                          (613) 533-2242
queen's university, kingston   
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