I am in the process of phasing out one NetWorker server in favor of another.

One of the clients on the old NetWorker server that needs to be phased out 
simply refuses to back up to the new server. The client is Solaris AMD with 
NetWorker 7.5.1 client and the server I want to back up to is a Red Hat Linux 
box with NetWorker server 7.5.3 on it. The client in question has two network 
drops. When I try to use the second drop (which is on the same side as the 
firewall as the new NetWorker server), I get nowhere with trying to back it up. 
Searching PowerLink has not been helpful. 

The error I get is …

39078:savefs: RPC error: Authentication failed or no valid authentication 
methods supported by both client and server

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