I have a NFS server running on CentOS 7.2 and I have a problem with one (path/client host) declared in my /etc/exports that should be exported and that is not...My /etc/exports file :/mnt/data/ host1(rw,all_squash,anonuid=1001,anongid=1001)/mnt/data/ host2(rw,all_squash,anonuid=1001,anongid=1001)/mnt/data/ host3(rw,all_squash,anonuid=1001,anongid=1001)/mnt/data/ host3(rw,all_squash,anonuid=1001,anongid=1001)I restarted my nfs server and do exportfs -a so the output of cat /var/lib/nfs/etab is correct:/mnt/data   host1(rw,sync,wdelay,hide,nocrossmnt,secure,root_squash,all_squash,no_subtree_check,secure_locks,acl,no_pnfs,anonuid=1001,anongid=1001,sec=sys,rw,secure,root_squash,all_squash)/mnt/data   host2(rw,sync,wdelay,hide,nocrossmnt,secure,root_squash,all_squash,no_subtree_check,secure_locks,acl,no_pnfs,anonuid=1001,anongid=1001,sec=sys,rw,secure,root_squash,all_squash)/mnt/data   host3(rw,sync,wdelay,hide,nocrossmnt,secure,root_squash,all_squash,no_subtree_check,secure_locks,acl,no_pnfs,anonuid=1001,anongid=1001,sec=sys,rw,secure,root_squash,all_squash)/mnt/data   host4(rw,sync,wdelay,hide,nocrossmnt,secure,root_squash,all_squash,no_subtree_check,secure_locks,acl,no_pnfs,anonuid=1001,anongid=1001,sec=sys,rw,secure,root_squash,all_squash)But when I run showmount -e it does not show me host1 :/mnt/data host2 host3 host4And actually I could not mount /mnt/data from host1 :[root@host1 ~]# mount -amount.nfs: access denied by server while mounting nfs-server:/mnt/data/Whereas the mount is OK from host2,3 and 4.PS :For information :host1...hostn can see and ping the NFS serverSElinux has been deactivated for testsNo firewall neither on server nor on client (VM are clones one from each other) Edit:Thanks for your responses.strace does not show much things:stat(/run, {st_mode=S_IFDIR|0755, st_size=960, ...}) = 0stat(/run/mount/utab, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0getcwd(/root, 4095)                   = 6readlink(/root/nfs-server:, 0x7ffe3a9ee090, 4096) = -1 ENOENT (No such file or directory)readlink(/mnt, 0x7ffe3a9edf70, 4096)  = -1 EINVAL (Invalid argument)readlink(/mnt/data, 0x7ffe3a9edf70, 4096) = -1 EINVAL (Invalid argument)stat(/sbin/mount.nfs, {st_mode=S_IFREG|S_ISUID|0755, st_size=113400, ...}) = 0clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7fd1b08f6b50) = 51633wait4(-1, mount.nfs: access denied by server while mounting nfs-server:/mnt/data/[{WIFEXITED(s) && WEXITSTATUS(s) == 32}], 0, NULL) = 51633--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=51633, si_status=32, si_utime=0, si_stime=0} ---close(1)                                = 0close(2)                                = 0exit_group(0)                           = ?+++ exited with 0 +++What I see about running services on host1 side is that no nfsv4.0-svc service is running :  [root@host1 ~]# ps -aux --forest | grep nfsroot      1199  0.0  0.0      0     0 ?        S<   Feb15   0:00  \_ [nfsiod]whereas it is running on other hosts that succeed in mounting /mnt/data[root@host2 ~]$ ps -ef | grep nfsroot      1296     2  0 fvr.15 ?     00:00:00 [nfsiod]root      1302     2  0 fvr.15 ?     00:00:00 [nfsv4.0-svc]But I don't know if it is a cause or a consequence (i.e. nfsv4.0-svc is running because the mount succeed...) : could it be the source of the pb ?
NFS server not exporting host present in /etc/exports
centos;nfs