Nomor port lapisan transport yang aneh selama percakapan nfs

0

Saya menggunakan autofs untuk me-mount share nfs, bagian autofses berfungsi dengan baik, saya dapat mencapai folder daun, tetapi ketika saya mencoba mengakses folder itu, pertukaran paket berikut terjadi dan tumpukan shell saya, itu turun 

[gm-web01] / net / arkive03 / mnt / mfs> cd mfsbackup
-bash: cd: mfsbackup: Tidak ada file atau direktori tersebut
pesan setelah sekitar satu menit. Lihatlah dua baris terakhir, bagaimana nomor port bisa lebih tinggi dari kisaran lapisan transport normal?

[arkive03] ~> tcpdump -i em1 -nn host 10.24.20.163
tcpdump: keluaran verbose ditekan, gunakan -v atau -vv untuk dekode protokol lengkap
mendengarkan pada em1, tipe tautan EN10MB (Ethernet), menangkap ukuran 65535 byte
11: 33: 48.598351 IP 10.24.20.163.55219> 10.44.20.137.111: Bendera [S], seq 2431214407, win 29200, opsi [mss 1460, sackOK, TS val 77231839 ecr 0, nop, wscale 7], panjang 0
11: 33: 48.598381 IP 10.44.20.137.111> 10.24.20.163.55219: Bendera [S.], seq 1732090298, ack 2431214408, menang 28960, opsi [mss 1460, sackOK, TS val 2997710933 ecr 77231839, tidak ada, skala 7 ], panjang 0
11: 33: 48.602006 IP 10.24.20.163.55219> 10.44.20.137.111: Bendera [.], Ack 1, win 229, opsi [nop, nop, TS val 77231840 ecr 2997710933], panjang 0
11: 33: 48.602043 IP 10.24.20.163.55219> 10.44.20.137.111: Bendera [P.], seq 1:45, ack 1, win 229, opsi [nop, nop, TS val 77231840 ecr 2997710933], panjang 44
11: 33: 48.602054 IP 10.44.20.137.111> 10.24.20.163.55219: Bendera [.], Ack 45, win 227, opsi [nop, nop, TS val 2997710934 ecr 77231840], panjang 0
11: 33: 48.602288 IP 10.44.20.137.111> 10.24.20.163.55219: Bendera [P.], seq 1:29, ack 45, win 227, opsi [nop, nop, TS val 2997710934 ecr 77231840], panjang 28
11: 33: 48.605756 IP 10.24.20.163.55219> 10.44.20.137.111: Bendera [.], Ack 29, win 229, opsi [nop, nop, TS val 77231841 ecr 2997710934], panjang 0
11: 33: 48.605826 IP 10.24.20.163.55219> 10.44.20.137.111: Bendera [P.], seq 45: 105, ack 29, win 229, opsi [nop, nop, TS val 77231841 ecr 2997710934], panjang 60
11: 33: 48.606038 IP 10.44.20.137.111> 10.24.20.163.55219: Bendera [P.], seq 29:61, ack 105, win 227, opsi [nop, nop, TS val 2997710935 ecr 77231841], panjang 32
11: 33: 48.609504 IP 10.24.20.163.46403> 10.44.20.137.2049: Bendera [S], seq 1293458899, win 29200, opsi [mss 1460, sackOK, TS val 77231842 ecr 0, nop, wscale 7], panjang 0
11: 33: 48.609534 IP 10.44.20.137.2049> 10.24.20.163.46403: Bendera [S.], seq 2805863182, ack 1293458900, menang 28960, opsi [mss 1460, sackOK, TS val 2997710935 ecr 77231842, nop, wscale 7 ], panjang 0
11: 33: 48.612993 IP 10.24.20.163.46403> 10.44.20.137.2049: Bendera [.], Ack 1, win 229, opsi [nop, nop, TS val 77231842 ecr 2997710935], panjang 0
11: 33: 48.613030 IP 10.24.20.163.46403> 10.44.20.137.2049: Bendera [P.], seq 1:45, ack 1, win 229, opsi [nop, nop, TS val 77231842 ecr 2997710935], panjang 44 : NFS request xid 916703790 null
11: 33: 48.613042 IP 10.44.20.137.2049> 10.24.20.163.46403: Bendera [.], Ack 45, win 227, opsi [nop, nop, TS val 2997710936 ecr 77231842], panjang 0
11: 33: 48.613149 IP 10.44.20.137.2049> 10.24.20.163.46403: Bendera [P.], seq 1:29, ack 45, win 227, opsi [nop, nop, TS val 2997710936 ecr 77231842], panjang 28 : NFS reply xid 916703790 reply ok 24 null
11: 33: 48.616331 IP 10.24.20.163.46403> 10.44.20.137.2049: Bendera [.], Ack 29, win 229, opsi [nop, nop, TS val 77231843 ecr 2997710936], panjang 0
11: 33: 48.616402 IP 10.24.20.163.55219> 10.44.20.137.111: Bendera [P.], seq 105: 149, ack 61, win 229, opsi [nop, nop, TS val 77231843 ecr 2997710935], panjang 44
11: 33: 48.616600 IP 10.44.20.137.111> 10.24.20.163.55219: Bendera [P.], seq 61:89, ack 149, win 227, options [nop, nop, TS val 2997710937 ecr 77231843], panjang 28
11: 33: 48.620262 IP 10.24.20.163.55219> 10.44.20.137.111: Bendera [P.], seq 149: 209, ack 89, win 229, opsi [nop, nop, TS val 77231844 ecr 2997710937], panjang 60
11: 33: 48.620457 IP 10.44.20.137.111> 10.24.20.163.55219: Bendera [P.], seq 89: 121, ack 209, win 227, options [nop, nop, TS val 2997710938 ecr 77231844], panjang 32
11: 33: 48.624021 IP 10.24.20.163.46403> 10.44.20.137.2049: Bendera [P.], seq 45:89, ack 29, win 229, opsi [nop, nop, TS val 77231845 ecr 2997710936], panjang 44 : NFS request xid 1081853030 null
11: 33: 48.624103 IP 10.44.20.137.2049> 10.24.20.163.46403: Bendera [P.], seq 29:57, ack 89, win 227, opsi [nop, nop, TS val 2997710939 ecr 77231845], panjang 28 : NFS reply xid 1081853030 reply ok 24 null
11: 33: 48.627318 IP 10.24.20.163.53809> 10.44.20.137.111: UDP, panjang 40
11: 33: 48.627507 IP 10.44.20.137.111> 10.24.20.163.53809: UDP, panjang 24
11: 33: 48.627617 IP 10.24.20.163.46403> 10.44.20.137.2049: Bendera [F.], seq 89, ack 57, win 229, opsi [nop, nop, TS val 77231846 ecr 2997710939], panjang 0
11: 33: 48.627687 IP 10.44.20.137.2049> 10.24.20.163.46403: Bendera [F.], seq 57, ack 90, win 227, opsi [nop, nop, TS val 2997710940 ecr 77231846], panjang 0
11: 33: 48.627706 IP 10.24.20.163.55219> 10.44.20.137.111: Bendera [F.], seq 209, ack 121, win 229, options [nop, nop, TS val 77231846 ecr 2997710938], panjang 0
11: 33: 48.627798 IP 10.44.20.137.111> 10.24.20.163.55219: Bendera [F.], seq 121, ack 210, win 227, opsi [nop, nop, TS val 2997710940 ecr 77231846], panjang 0
11: 33: 48.629818 IP 10.24.20.163.53809> 10.44.20.137.111: UDP, panjang 56
11: 33: 48.630039 IP 10.44.20.137.111> 10.24.20.163.53809: UDP, panjang 28
11: 33: 48.631031 IP 10.24.20.163.46403> 10.44.20.137.2049: Bendera [.], Ack 58, win 229, opsi [nop, nop, TS val 77231847 ecr 2997710940], panjang 0
11: 33: 48.631111 IP 10.24.20.163.55219> 10.44.20.137.111: Bendera [.], Ack 122, win 229, opsi [nop, nop, TS val 77231847 ecr 2997710940], panjang 0
11: 33: 48.632826 IP 10.24.20.163.2073489439> 10.44.20.137.2049: 40 null
11: 33: 48.632921 IP 10.44.20.137.2049> 10.24.20.163.2073489439: balas ok 24 nol
11: 33: 48.635617 IP 10.24.20.163.53809> 10.44.20.137.111: UDP, panjang 40
11: 33: 48.635807 IP 10.44.20.137.111> 10.24.20.163.53809: UDP, panjang 24
11: 33: 48.638213 IP 10.24.20.163.53809> 10.44.20.137.111: UDP, panjang 56
11: 33: 48.638404 IP 10.44.20.137.111> 10.24.20.163.53809: UDP, panjang 28
11: 33: 48.641185 IP 10.24.20.163. ** 217782617 **> 10.44.20.137.2049: 40 null
11: 33: 48.641280 IP 10.44.20.137.2049> 10.24.20.163. ** 217782617 **: balas ok 24 nol
nfs  automount  autofs 
— Edik Mkoyan
sumber

Jawaban:

1

Sejauh yang saya tahu, itu bukan nomor port TCP atau UDP; itu adalah ID transaksi RPC. (Lihat print-nfs.c:nfsreply_printdalam sumber tcpdump.)

tcpdump terkadang cenderung menggunakan keluaran yang sangat singkat; pertimbangkan menggunakan -vatau tshark sebagai gantinya.

— grawity
sumber
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