[Merclangrat]

I enabled UDP and NFSv3, disabled NFSv4, but it still doesn't work for me after upgrade my Linux machine to Devuan Daedalus (it's systemd-free Debian Bookworm). It worked before on the previous Linux version (Chimaera). No firewall... Does anyone has any ideas?

rpcbind is enabled, everything is enabled, but they seem to have broken something in Linux NFS...

what I get (.5 is IRIX, .1 is Linux which acts as a server)

on IRIX:

-bash-4.2# mount -t nfs 172.19.4.1:/storage0 /stuff/mnt
mount: 172.19.4.1:/storage0 on /stuff/mnt: I/O error
mount: giving up on:
  /stuff/mnt

I see in logs that Linux allows IRIX's mount request:

2024-09-07T21:42:19.294206+02:00 serana rpc.mountd[6806]: check_default: access by 172.19.4.5 ALLOWED (cached)
2024-09-07T21:42:19.294235+02:00 serana rpc.mountd[6806]: Received MNT1(/storage0) request from 172.19.4.5
2024-09-07T21:42:19.294299+02:00 serana rpc.mountd[6806]: authenticated mount request from 172.19.4.5:957 for /storage0 (/storage0)
2024-09-07T21:42:19.295703+02:00 serana rpc.mountd[6806]: granted access to /storage0 for 172.19.0.0/255.255.0.0

but what I see in tcpdump on Linux:

21:42:19.499675 IP 172.19.4.5.682 > 172.19.4.1.2049: NFS request xid 422345574 116 getattr fh Unknown/010005008C09CDEA7C83BB4C0000000000000000000000000000000000000000
E.......<.4..............|.}.,{f...........................,f.......indy.............................................  ..|..L....................
21:42:19.500153 IP 172.19.4.1.2049 > 172.19.4.5.682: NFS reply xid 422345574 reply ok 32 getattr PROG_MISMATCH

UPD: found in logs that IRIX wants NFS2:
Sep  7 19:42:19 6A:indy unix: NFS2 unknown failed for server 172.19.4.1: Program/version mismatch