hi Kinglong: There has no firewall. While my client system is Ubuntu 14.04, it's ok. There has problem on ubuntu12.04 system. But if I add a parameter sec=sys, it is also ok. Such as, #mount -t nfs -o sec=sys 193.168.70.26:/root/hh /mnt/uu But when my mount command line t is #mount -t nfs 193.168.70.26:/root/hh /mnt/uu it fail. There is some client fail log: Mar 14 08:30:41 ubuntu12 kernel: [347881.225950] NFS: nfs mount opts='vers=4,addr=192.168.70.26,clientaddr=192.168.70.228' Mar 14 08:30:41 ubuntu12 kernel: [347881.225962] NFS: parsing nfs mount option 'vers=4' Mar 14 08:30:41 ubuntu12 kernel: [347881.225973] NFS: parsing nfs mount option 'addr=192.168.70.26' Mar 14 08:30:41 ubuntu12 kernel: [347881.225983] NFS: parsing nfs mount option 'clientaddr=192.168.70.228' Mar 14 08:30:41 ubuntu12 kernel: [347881.225989] NFS: MNTPATH: '/root/hh' Mar 14 08:30:41 ubuntu12 kernel: [347881.225998] --> nfs4_try_mount() Mar 14 08:30:41 ubuntu12 kernel: [347881.226005] --> nfs4_create_server() Mar 14 08:30:41 ubuntu12 kernel: [347881.226027] --> nfs4_init_server() Mar 14 08:30:41 ubuntu12 kernel: [347881.226028] --> nfs4_set_client() Mar 14 08:30:41 ubuntu12 kernel: [347881.226031] --> nfs_get_client(192.168.70.26,v4) Mar 14 08:30:41 ubuntu12 kernel: [347881.226054] NFS: get client cookie (0xffff880036e80400/0xffff88003a724058) Mar 14 08:30:41 ubuntu12 kernel: [347881.227257] --> nfs4_realloc_slot_table: max_reqs=1024, tbl->max_slots 0 Mar 14 08:30:41 ubuntu12 kernel: [347881.227398] nfs4_realloc_slot_table: tbl=ffff88003c382800 slots=ffff88003b895740 max_slots=1024 Mar 14 08:30:41 ubuntu12 kernel: [347881.227401] <-- nfs4_realloc_slot_table: return 0 Mar 14 08:30:41 ubuntu12 kernel: [347881.227407] NFS: nfs4_discover_server_trunking: testing '192.168.70.26' Mar 14 08:30:41 ubuntu12 kernel: [347881.227412] NFS call setclientid auth=RPCSEC_GSS, 'Linux NFSv4.0 192.168.70.228/192.168.70.26 tcp' Mar 14 08:30:56 ubuntu12 kernel: [347896.219667] RPC: AUTH_GSS upcall timed out. Mar 14 08:30:56 ubuntu12 kernel: [347896.219667] Please check user daemon is running. Mar 14 08:30:56 ubuntu12 kernel: [347896.219690] NFS reply setclientid: -13 Mar 14 08:30:56 ubuntu12 kernel: [347896.219700] NFS call setclientid auth=RPCSEC_GSS, 'Linux NFSv4.0 192.168.70.228/192.168.70.26 tcp' Mar 14 08:30:56 ubuntu12 kernel: [347896.467612] NFS reply setclientid: -13 Mar 14 08:30:56 ubuntu12 kernel: [347896.467675] NFS call setclientid auth=UNIX, 'Linux NFSv4.0 192.168.70.228/192.168.70.26 tcp' Mar 14 08:30:56 ubuntu12 kernel: [347896.468364] NFS reply setclientid: 0 Mar 14 08:30:56 ubuntu12 kernel: [347896.468370] NFS call setclientid_confirm auth=UNIX, (client ID 9366c6580d000000) Mar 14 08:30:56 ubuntu12 kernel: [347896.468708] NFS reply setclientid_confirm: 0 Mar 14 08:30:56 ubuntu12 kernel: [347896.468713] NFS: <-- nfs40_walk_client_list using nfs_client = ffff880036e80400 ({2}) Mar 14 08:30:56 ubuntu12 kernel: [347896.468715] NFS: <-- nfs40_walk_client_list status = 0 Mar 14 08:30:56 ubuntu12 kernel: [347896.468717] nfs4_schedule_state_renewal: requeueing work. Lease period = 5 Mar 14 08:30:56 ubuntu12 kernel: [347896.468721] NFS: nfs4_discover_server_trunking: status = 0 Mar 14 08:30:56 ubuntu12 kernel: [347896.468722] --> nfs_put_client({2}) Mar 14 08:30:56 ubuntu12 kernel: [347896.468725] <-- nfs4_set_client() = 0 [new ffff880036e80400] Mar 14 08:30:56 ubuntu12 kernel: [347896.468788] <-- nfs4_init_server() = 0 Mar 14 08:30:56 ubuntu12 kernel: [347896.468791] --> nfs4_get_rootfh() Mar 14 08:30:56 ubuntu12 kernel: [347896.468802] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:56 ubuntu12 kernel: [347896.468805] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:56 ubuntu12 kernel: [347896.715547] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:56 ubuntu12 kernel: [347896.715571] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:56 ubuntu12 kernel: [347896.715575] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:56 ubuntu12 kernel: [347896.963430] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:56 ubuntu12 kernel: [347896.963469] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:56 ubuntu12 kernel: [347896.963474] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.211331] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:57 ubuntu12 kernel: [347897.211347] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:57 ubuntu12 kernel: [347897.211350] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212115] decode_attr_type: type=040000 Mar 14 08:30:57 ubuntu12 kernel: [347897.212119] decode_attr_change: change attribute=6394568334484006929 Mar 14 08:30:57 ubuntu12 kernel: [347897.212121] decode_attr_size: file size=4096 Mar 14 08:30:57 ubuntu12 kernel: [347897.212123] decode_attr_fsid: fsid=(0x0/0x0) Mar 14 08:30:57 ubuntu12 kernel: [347897.212126] decode_attr_fileid: fileid=2 Mar 14 08:30:57 ubuntu12 kernel: [347897.212128] decode_attr_fs_locations: fs_locations done, error = 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212130] decode_attr_mode: file mode=0755 Mar 14 08:30:57 ubuntu12 kernel: [347897.212132] decode_attr_nlink: nlink=24 Mar 14 08:30:57 ubuntu12 kernel: [347897.212135] decode_attr_owner: uid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212137] decode_attr_group: gid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212139] decode_attr_rdev: rdev=(0x0:0x0) Mar 14 08:30:57 ubuntu12 kernel: [347897.212142] decode_attr_space_used: space used=4096 Mar 14 08:30:57 ubuntu12 kernel: [347897.212144] decode_attr_time_access: atime=1489456301 Mar 14 08:30:57 ubuntu12 kernel: [347897.212146] decode_attr_time_metadata: ctime=1488851461 Mar 14 08:30:57 ubuntu12 kernel: [347897.212147] decode_attr_time_modify: mtime=1488851461 Mar 14 08:30:57 ubuntu12 kernel: [347897.212149] decode_attr_mounted_on_fileid: fileid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212151] decode_getfattr_attrs: xdr returned 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212152] decode_getfattr_generic: xdr returned 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212155] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:57 ubuntu12 kernel: [347897.212163] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:57 ubuntu12 kernel: [347897.212166] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212446] decode_attr_supported: bitmask=fdffbfff:00f9be3e:00000000 Mar 14 08:30:57 ubuntu12 kernel: [347897.212449] decode_attr_fh_expire_type: expire type=0x0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212451] decode_attr_link_support: link support=true Mar 14 08:30:57 ubuntu12 kernel: [347897.212453] decode_attr_symlink_support: symlink support=true Mar 14 08:30:57 ubuntu12 kernel: [347897.212454] decode_attr_aclsupport: ACLs supported=3 Mar 14 08:30:57 ubuntu12 kernel: [347897.212456] decode_server_caps: xdr returned 0! Mar 14 08:30:57 ubuntu12 kernel: [347897.212459] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:57 ubuntu12 kernel: [347897.212465] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:57 ubuntu12 kernel: [347897.212467] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212719] decode_attr_lease_time: file size=30 Mar 14 08:30:57 ubuntu12 kernel: [347897.212722] decode_attr_maxfilesize: maxfilesize=17592186040320 Mar 14 08:30:57 ubuntu12 kernel: [347897.212724] decode_attr_maxread: maxread=1048576 Mar 14 08:30:57 ubuntu12 kernel: [347897.212726] decode_attr_maxwrite: maxwrite=1048576 Mar 14 08:30:57 ubuntu12 kernel: [347897.212728] decode_attr_time_delta: time_delta=1 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212729] decode_attr_pnfstype: bitmap is 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212731] decode_attr_layout_blksize: bitmap is 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212733] decode_fsinfo: xdr returned 0! Mar 14 08:30:57 ubuntu12 kernel: [347897.212735] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:57 ubuntu12 kernel: [347897.212740] <-- nfs4_get_rootfh() = 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212742] Server FSID: 0:0 Mar 14 08:30:57 ubuntu12 kernel: [347897.212761] Pseudo-fs root FH at ffff88003bbcf0c0 is 8 bytes, crc: 0x62d40c52: Mar 14 08:30:57 ubuntu12 kernel: [347897.212763] 01000100 00000000 Mar 14 08:30:57 ubuntu12 kernel: [347897.212765] --> nfs_probe_fsinfo() Mar 14 08:30:57 ubuntu12 kernel: [347897.212768] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:57 ubuntu12 kernel: [347897.212770] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.213028] decode_attr_supported: bitmask=fdffbfff:00f9be3e:00000000 Mar 14 08:30:57 ubuntu12 kernel: [347897.213031] decode_attr_fh_expire_type: expire type=0x0 Mar 14 08:30:57 ubuntu12 kernel: [347897.213032] decode_attr_link_support: link support=true Mar 14 08:30:57 ubuntu12 kernel: [347897.213034] decode_attr_symlink_support: symlink support=true Mar 14 08:30:57 ubuntu12 kernel: [347897.213036] decode_attr_aclsupport: ACLs supported=3 Mar 14 08:30:57 ubuntu12 kernel: [347897.213037] decode_server_caps: xdr returned 0! Mar 14 08:30:57 ubuntu12 kernel: [347897.213040] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:57 ubuntu12 kernel: [347897.213046] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:57 ubuntu12 kernel: [347897.213047] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.213283] decode_attr_lease_time: file size=30 Mar 14 08:30:57 ubuntu12 kernel: [347897.213286] decode_attr_maxfilesize: maxfilesize=17592186040320 Mar 14 08:30:57 ubuntu12 kernel: [347897.213288] decode_attr_maxread: maxread=1048576 Mar 14 08:30:57 ubuntu12 kernel: [347897.213290] decode_attr_maxwrite: maxwrite=1048576 Mar 14 08:30:57 ubuntu12 kernel: [347897.213291] decode_attr_time_delta: time_delta=1 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.213293] decode_attr_pnfstype: bitmap is 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.213294] decode_attr_layout_blksize: bitmap is 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.213302] decode_fsinfo: xdr returned 0! Mar 14 08:30:57 ubuntu12 kernel: [347897.213305] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:57 ubuntu12 kernel: [347897.213310] set_pnfs_layoutdriver: Using NFSv4 I/O Mar 14 08:30:57 ubuntu12 kernel: [347897.213315] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:57 ubuntu12 kernel: [347897.213317] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.213553] decode_attr_maxlink: maxlink=255 Mar 14 08:30:57 ubuntu12 kernel: [347897.213556] decode_attr_maxname: maxname=255 Mar 14 08:30:57 ubuntu12 kernel: [347897.213558] decode_pathconf: xdr returned 0! Mar 14 08:30:57 ubuntu12 kernel: [347897.213560] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:57 ubuntu12 kernel: [347897.213564] <-- nfs_probe_fsinfo() = 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.213568] <-- nfs4_create_server() = ffff88003bbab800 Mar 14 08:30:57 ubuntu12 kernel: [347897.213726] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:57 ubuntu12 kernel: [347897.213728] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.217688] decode_attr_supported: bitmask=fdffbfff:00f9be3e:00000000 Mar 14 08:30:57 ubuntu12 kernel: [347897.217692] decode_attr_fh_expire_type: expire type=0x0 Mar 14 08:30:57 ubuntu12 kernel: [347897.217694] decode_attr_link_support: link support=true Mar 14 08:30:57 ubuntu12 kernel: [347897.217696] decode_attr_symlink_support: symlink support=true Mar 14 08:30:57 ubuntu12 kernel: [347897.217698] decode_attr_aclsupport: ACLs supported=3 Mar 14 08:30:57 ubuntu12 kernel: [347897.217700] decode_server_caps: xdr returned 0! Mar 14 08:30:57 ubuntu12 kernel: [347897.217704] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:57 ubuntu12 kernel: [347897.217720] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:57 ubuntu12 kernel: [347897.217723] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218073] decode_attr_type: type=040000 Mar 14 08:30:57 ubuntu12 kernel: [347897.218077] decode_attr_change: change attribute=6394568334484006929 Mar 14 08:30:57 ubuntu12 kernel: [347897.218079] decode_attr_size: file size=4096 Mar 14 08:30:57 ubuntu12 kernel: [347897.218081] decode_attr_fsid: fsid=(0x0/0x0) Mar 14 08:30:57 ubuntu12 kernel: [347897.218083] decode_attr_fileid: fileid=2 Mar 14 08:30:57 ubuntu12 kernel: [347897.218085] decode_attr_fs_locations: fs_locations done, error = 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218086] decode_attr_mode: file mode=0755 Mar 14 08:30:57 ubuntu12 kernel: [347897.218088] decode_attr_nlink: nlink=24 Mar 14 08:30:57 ubuntu12 kernel: [347897.218091] decode_attr_owner: uid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218093] decode_attr_group: gid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218095] decode_attr_rdev: rdev=(0x0:0x0) Mar 14 08:30:57 ubuntu12 kernel: [347897.218096] decode_attr_space_used: space used=4096 Mar 14 08:30:57 ubuntu12 kernel: [347897.218098] decode_attr_time_access: atime=1489456301 Mar 14 08:30:57 ubuntu12 kernel: [347897.218100] decode_attr_time_metadata: ctime=1488851461 Mar 14 08:30:57 ubuntu12 kernel: [347897.218102] decode_attr_time_modify: mtime=1488851461 Mar 14 08:30:57 ubuntu12 kernel: [347897.218103] decode_attr_mounted_on_fileid: fileid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218105] decode_getfattr_attrs: xdr returned 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218106] decode_getfattr_generic: xdr returned 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218109] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:57 ubuntu12 kernel: [347897.218127] NFS: nfs_fhget(0:32/2 fh_crc=0x62d40c52 ct=1) Mar 14 08:30:57 ubuntu12 kernel: [347897.218146] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:57 ubuntu12 kernel: [347897.218148] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218426] decode_attr_type: type=00 Mar 14 08:30:57 ubuntu12 kernel: [347897.218429] decode_attr_change: change attribute=6394568334484006929 Mar 14 08:30:57 ubuntu12 kernel: [347897.218431] decode_attr_size: file size=4096 Mar 14 08:30:57 ubuntu12 kernel: [347897.218433] decode_attr_fsid: fsid=(0x0/0x0) Mar 14 08:30:57 ubuntu12 kernel: [347897.218434] decode_attr_fileid: fileid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218436] decode_attr_fs_locations: fs_locations done, error = 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218438] decode_attr_mode: file mode=00 Mar 14 08:30:57 ubuntu12 kernel: [347897.218439] decode_attr_nlink: nlink=1 Mar 14 08:30:57 ubuntu12 kernel: [347897.218441] decode_attr_owner: uid=-2 Mar 14 08:30:57 ubuntu12 kernel: [347897.218443] decode_attr_group: gid=-2 Mar 14 08:30:57 ubuntu12 kernel: [347897.218444] decode_attr_rdev: rdev=(0x0:0x0) Mar 14 08:30:57 ubuntu12 kernel: [347897.218446] decode_attr_space_used: space used=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218448] decode_attr_time_access: atime=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218449] decode_attr_time_metadata: ctime=1488851461 Mar 14 08:30:57 ubuntu12 kernel: [347897.218451] decode_attr_time_modify: mtime=1488851461 Mar 14 08:30:57 ubuntu12 kernel: [347897.218452] decode_attr_mounted_on_fileid: fileid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218454] decode_getfattr_attrs: xdr returned 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218455] decode_getfattr_generic: xdr returned 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218458] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:57 ubuntu12 kernel: [347897.218465] NFS: nfs_update_inode(0:32/2 fh_crc=0x62d40c52 ct=2 info=0x26040) Mar 14 08:30:57 ubuntu12 kernel: [347897.218477] NFS: permission(0:32/2), mask=0x1, res=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218481] NFS: permission(0:32/2), mask=0x1, res=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218489] NFS: lookup(/root) Mar 14 08:30:57 ubuntu12 kernel: [347897.218495] NFS call lookup root Mar 14 08:30:57 ubuntu12 kernel: [347897.218498] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:57 ubuntu12 kernel: [347897.218503] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218943] decode_attr_type: type=040000 Mar 14 08:30:57 ubuntu12 kernel: [347897.218946] decode_attr_change: change attribute=6397154514070534174 Mar 14 08:30:57 ubuntu12 kernel: [347897.218948] decode_attr_size: file size=4096 Mar 14 08:30:57 ubuntu12 kernel: [347897.218950] decode_attr_fsid: fsid=(0x96e7857195ab4a4b/0x8bb47786a5dc434a) Mar 14 08:30:57 ubuntu12 kernel: [347897.218952] decode_attr_fileid: fileid=262145 Mar 14 08:30:57 ubuntu12 kernel: [347897.218953] decode_attr_fs_locations: fs_locations done, error = 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218955] decode_attr_mode: file mode=0700 Mar 14 08:30:57 ubuntu12 kernel: [347897.218956] decode_attr_nlink: nlink=5 Mar 14 08:30:57 ubuntu12 kernel: [347897.218959] decode_attr_owner: uid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218961] decode_attr_group: gid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218962] decode_attr_rdev: rdev=(0x0:0x0) Mar 14 08:30:57 ubuntu12 kernel: [347897.218964] decode_attr_space_used: space used=4096 Mar 14 08:30:57 ubuntu12 kernel: [347897.218966] decode_attr_time_access: atime=1489453599 Mar 14 08:30:57 ubuntu12 kernel: [347897.218967] decode_attr_time_metadata: ctime=1489453603 Mar 14 08:30:57 ubuntu12 kernel: [347897.218969] decode_attr_time_modify: mtime=1489453603 Mar 14 08:30:57 ubuntu12 kernel: [347897.218970] decode_attr_mounted_on_fileid: fileid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218971] decode_getfattr_attrs: xdr returned 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218973] decode_getfattr_generic: xdr returned 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218976] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:57 ubuntu12 kernel: [347897.218980] NFS reply lookup: 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.218985] NFS: nfs_fhget(0:32/262145 fh_crc=0x282dfa5b ct=1) Mar 14 08:30:57 ubuntu12 kernel: [347897.218996] --> nfs_d_automount() Mar 14 08:30:57 ubuntu12 kernel: [347897.218998] nfs_d_automount: enter Mar 14 08:30:57 ubuntu12 kernel: [347897.219000] NFS call lookup root Mar 14 08:30:57 ubuntu12 kernel: [347897.219003] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:57 ubuntu12 kernel: [347897.219005] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.219319] decode_attr_type: type=040000 Mar 14 08:30:57 ubuntu12 kernel: [347897.219323] decode_attr_change: change attribute=6397154514070534174 Mar 14 08:30:57 ubuntu12 kernel: [347897.219324] decode_attr_size: file size=4096 Mar 14 08:30:57 ubuntu12 kernel: [347897.219326] decode_attr_fsid: fsid=(0x96e7857195ab4a4b/0x8bb47786a5dc434a) Mar 14 08:30:57 ubuntu12 kernel: [347897.219328] decode_attr_fileid: fileid=262145 Mar 14 08:30:57 ubuntu12 kernel: [347897.219330] decode_attr_fs_locations: fs_locations done, error = 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.219331] decode_attr_mode: file mode=0700 Mar 14 08:30:57 ubuntu12 kernel: [347897.219333] decode_attr_nlink: nlink=5 Mar 14 08:30:57 ubuntu12 kernel: [347897.219335] decode_attr_owner: uid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.219336] decode_attr_group: gid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.219338] decode_attr_rdev: rdev=(0x0:0x0) Mar 14 08:30:57 ubuntu12 kernel: [347897.219340] decode_attr_space_used: space used=4096 Mar 14 08:30:57 ubuntu12 kernel: [347897.219341] decode_attr_time_access: atime=1489453599 Mar 14 08:30:57 ubuntu12 kernel: [347897.219343] decode_attr_time_metadata: ctime=1489453603 Mar 14 08:30:57 ubuntu12 kernel: [347897.219344] decode_attr_time_modify: mtime=1489453603 Mar 14 08:30:57 ubuntu12 kernel: [347897.219346] decode_attr_mounted_on_fileid: fileid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.219347] decode_getfattr_attrs: xdr returned 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.219349] decode_getfattr_generic: xdr returned 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.219351] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:57 ubuntu12 kernel: [347897.219355] NFS reply lookup: 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.219530] NFS call secinfo root Mar 14 08:30:57 ubuntu12 kernel: [347897.219535] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:57 ubuntu12 kernel: [347897.219537] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.220215] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:57 ubuntu12 kernel: [347897.220222] NFS reply secinfo: 0 Mar 14 08:30:57 ubuntu12 kernel: [347897.230984] --> nfs_do_submount() Mar 14 08:30:57 ubuntu12 kernel: [347897.230990] nfs_do_submount: submounting on /root Mar 14 08:30:57 ubuntu12 kernel: [347897.230999] --> nfs_xdev_mount() Mar 14 08:30:57 ubuntu12 kernel: [347897.231002] --> nfs_clone_server(,96e7857195ab4a4b:8bb47786a5dc434a,) Mar 14 08:30:57 ubuntu12 kernel: [347897.231045] --> nfs_probe_fsinfo() Mar 14 08:30:57 ubuntu12 kernel: [347897.231052] --> nfs4_alloc_slot used_slots=0000 highest_used=4294967295 max_slots=1024 Mar 14 08:30:57 ubuntu12 kernel: [347897.231054] <-- nfs4_alloc_slot used_slots=0001 highest_used=0 slotid=0 Mar 14 08:30:57 ubuntu12 kernel: [347897.475244] nfs4_free_slot: slotid 0 highest_used_slotid 4294967295 Mar 14 08:30:57 ubuntu12 kernel: [347897.475255] nfs_probe_fsinfo: error = 13 Mar 14 08:30:57 ubuntu12 kernel: [347897.475258] --> nfs_free_server() Mar 14 08:30:57 ubuntu12 kernel: [347897.475284] --> nfs_put_client({2}) Mar 14 08:30:57 ubuntu12 kernel: [347897.475300] <-- nfs_free_server() Mar 14 08:30:57 ubuntu12 kernel: [347897.475301] <-- nfs_clone_server() = error -13 Mar 14 08:30:57 ubuntu12 kernel: [347897.475303] <-- nfs_xdev_mount() = -13 Mar 14 08:30:57 ubuntu12 kernel: [347897.475309] nfs_do_submount: done Mar 14 08:30:57 ubuntu12 kernel: [347897.475311] <-- nfs_do_submount() = fffffffffffffff3 Mar 14 08:30:57 ubuntu12 kernel: [347897.475319] <-- nfs_d_automount(): error -13 Mar 14 08:30:57 ubuntu12 kernel: [347897.475334] NFS: dentry_delete(/root, 22008c) Mar 14 08:30:57 ubuntu12 kernel: [347897.476094] NFS: clear cookie (0xffff88001b70d060/0x (null)) Mar 14 08:30:57 ubuntu12 kernel: [347897.476100] NFS: clear cookie (0xffff88001b70c000/0x (null)) Mar 14 08:30:57 ubuntu12 kernel: [347897.476223] NFS: releasing superblock cookie (0xffff88003bbab800/0x (null)) Mar 14 08:30:57 ubuntu12 kernel: [347897.476226] --> nfs_free_server() Mar 14 08:30:57 ubuntu12 kernel: [347897.476241] --> nfs_put_client({1}) Mar 14 08:30:57 ubuntu12 kernel: [347897.476347] --> nfs_free_client(4) Mar 14 08:30:57 ubuntu12 kernel: [347897.476349] NFS: releasing client cookie (0xffff880036e80400/0xffff88003a724058) Mar 14 08:30:57 ubuntu12 kernel: [347897.476415] <-- nfs_free_client() Mar 14 08:30:57 ubuntu12 kernel: [347897.476428] <-- nfs_free_server() Mar 14 08:30:57 ubuntu12 kernel: [347897.476438] <-- nfs4_try_mount() = -13 [error] Thanks, houlinfei On 3/13/2017 11:42, houlinfei wrote: > hi Kinglong: > > At server, > #cat /etc/exports > /root/hh *(rw,sync,insecure,subtree_check,no_root_squash) > #cat /proc/fs/nfsd/versions > -2 +3 +4 +4.1 +4.2 > > At client, > #mount -t nfs 193.168.70.26:/root/hh /mnt/uu > mount.nfs: access denied by server while mounting > 192.168.70.26:/root/hh Everything is okay on my test machine. Is it failed every client? or only one client? What't the state of filewalld ? Can you try again with filewalld turndown? thanks, Kinglong Mee -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html ------------------------------------------------------------------------------------------------------------------------------------- 本邮件及其附件含有杭州华三通信技术有限公司的保密信息,仅限于发送给上面地址中列出 的个人或群组。禁止任何其他人以任何形式使用(包括但不限于全部或部分地泄露、复制、 或散发)本邮件中的信息。如果您错收了本邮件,请您立即电话或邮件通知发件人并删除本 邮件! This e-mail and its attachments contain confidential information from H3C, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it! ��.n��������+%������w��{.n�����{��w���jg��������ݢj����G�������j:+v���w�m������w�������h�����٥