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- DNS
- DHCP
- SMTP
- NTP
- NFS?
- LDAP? How do we handle accounts? I think we will want accounts on at least the head node. The execution nodes could run everything as nobody or as real users.
- Local accounts only?
- ssh
- rsync (nraorsync_plugin.py)
- NAT so the nodes can download/upload data
- TFTP
- condor (port 9618) https://htcondor-wiki.cs.wisc.edu/index.cgi/wiki?p=HowToMixFirewallsAndHtCondor
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