RPC issue from old production VM

We notice the following message in old instance's log after we cutover to new instance:

[3240509.097782] RPC: server nfs.gpfs5.rc.uab.edu requires stronger authentication.

added Sprint 25-12 label

changed the description

While we don't need to trace this down in the code, it's helpful to see that this error originates during the RPC header parsing. It originates from and rpc_auth_error and maps to an rpc_auth_tooweak.

https://github.com/linux-nfs/nfsd/blob/a79be02bba5c31f967885c7f3bf3a756d77d11d9/net/sunrpc/clnt.c#L2821

This confirms the server is the on responding with the condition. Google results suggest multiple potential issues including unprivileged ports, NAT scenarios, and mount point permissions.

duplicate of #252

closed