Mount program did not pass remote address: NFS client is debian 13, server MacOS

Question

My mac is exporting an NFS file system, as best I can tell. showmount -e on the mac shows an export.

➜ infrastructure git:(bim-typo) showmount -e
Exports list on localhost:
/Users/bensonmargulies box.local

On the debian system:

 sudo /usr/sbin/showmount -e itty.local 
Export list for itty.local:
/Users/bensonmargulies box.local

On my debian system, I can ping the mac. When I try to mount the file system, I get:

NFS: mount program didn't pass remote address

the mount command is

mount itty.local:/Users/bensonmargulies /mnt/me

/etc/exports contains:

/Users/bensonmargulies -rw -mapall=bensonmargulies

rpcinfo on the mac:

➜ infrastructure git:(bim-typo) rpcinfo -p localhost
 program vers proto port
 100000 2 udp 111 rpcbind
 100000 3 udp 111 rpcbind
 100000 4 udp 111 rpcbind
 100000 2 tcp 111 rpcbind
 100000 3 tcp 111 rpcbind
 100000 4 tcp 111 rpcbind
 100024 1 udp 865 status
 100024 1 tcp 1021 status
 100021 0 udp 727 nlockmgr
 100021 1 udp 727 nlockmgr
 100021 3 udp 727 nlockmgr
 100021 4 udp 727 nlockmgr
 100021 0 tcp 1017 nlockmgr
 100021 1 tcp 1017 nlockmgr
 100021 3 tcp 1017 nlockmgr
 100021 4 tcp 1017 nlockmgr
 100003 2 udp 2049 nfs
 100003 3 udp 2049 nfs
 100003 2 tcp 2049 nfs
 100003 3 tcp 2049 nfs
 100005 1 udp 853 mountd
 100005 3 udp 853 mountd
 100005 1 tcp 1023 mountd
 100005 3 tcp 1023 mountd
 100011 1 udp 921 rquotad
 100011 2 udp 921 rquotad
 100011 1 tcp 999 rquotad
 100011 2 tcp 999 rquotad

On the debian system:

â infrastructure git:(bim-testbed-lambda) rpcinfo -p itty.local 
 program vers proto port service
 100000 2 udp 111 portmapper
 100000 3 udp 111 portmapper
 100000 4 udp 111 portmapper
 100000 2 tcp 111 portmapper
 100000 3 tcp 111 portmapper
 100000 4 tcp 111 portmapper
 100024 1 udp 865 status
 100024 1 tcp 1021 status
 100021 0 udp 727 nlockmgr
 100021 1 udp 727 nlockmgr
 100021 3 udp 727 nlockmgr
 100021 4 udp 727 nlockmgr
 100021 0 tcp 1017 nlockmgr
 100021 1 tcp 1017 nlockmgr
 100021 3 tcp 1017 nlockmgr
 100021 4 tcp 1017 nlockmgr
 100003 2 udp 2049 nfs
 100003 3 udp 2049 nfs
 100003 2 tcp 2049 nfs
 100003 3 tcp 2049 nfs
 100005 1 udp 853 mountd
 100005 3 udp 853 mountd
 100005 1 tcp 1023 mountd
 100005 3 tcp 1023 mountd
 100011 1 udp 921 rquotad
 100011 2 udp 921 rquotad
 100011 1 tcp 999 rquotad
 100011 2 tcp 999 rquotad

As far as I can tell, all of this should be NFSv4.

Debian seems to only have v4.

• David G.: Is that showmount -e being run from the debian system? Which NFS versions are involved? You are running mount as root, right? Have you tried rpcinfo at all?
• Archemar: is box.local refering to your debian system ? (looks like a modem/router name to me)
• David G.: In fact, the rpcinfo reveals that it is strictly NFS v2 and v3, and not v4. If the debian linux kernel is built to not include v2 or v3, that could explain the problem.
• bmargulies: box.local is the name of the debian. OK, that's the answer, nfs version.