no DIFAX

Looks like we have not been receiving any DIFAX from Alden since 22Z on Saturday.
Can't ldmping thunder (or lightning).  I get this:

ldmping thunder.alden.com
Aug 23 18:20:06 :      State    Elapsed Port   Remote_Host           rpc_stat
Aug 23 18:20:16 : h_clnt_call: thunder.alden.com: NULLPROC: time elapsed 10.002 
710
Aug 23 18:20:16 :      NAMED  10.002710    0   thunder.alden.com  can't contact
portmapper: RPC_TIMED_OUT

However I can normal ping them just fine so the network and machines are OK.