Re: Une trace réseau ?

J'ai fait un tcpdump sur le serveur.
Voici les trames lorsque qqn se connecte et la connexion FTP foire (timeout après la commande LIST)

-------------------------------------------------------------------------------------
No. Time Source Destination Protocol Info
1 0.000000 XX.XX.XX.XX YY.YY.YY.YY TCP gxs-data-port > ftp [SYN] Seq=0 Win=65535 Len=0 MSS=1460
2 0.000045 YY.YY.YY.YY XX.XX.XX.XX TCP ftp > gxs-data-port [SYN, ACK] Seq=0 Ack=1 Win=5840 Len=0 MSS=1460
3 0.138574 XX.XX.XX.XX YY.YY.YY.YY TCP gxs-data-port > ftp [ACK] Seq=1 Ack=1 Win=65535 Len=0
4 0.139603 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 220 FTP Server ready.
5 0.321382 XX.XX.XX.XX YY.YY.YY.YY FTP Request: USER ZZZZZZZ
6 0.321411 YY.YY.YY.YY XX.XX.XX.XX TCP ftp > gxs-data-port [ACK] Seq=24 Ack=21 Win=5840 Len=0
7 0.321891 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 331 Password required for ZZZZZZZZZZ.
8 0.461581 XX.XX.XX.XX YY.YY.YY.YY FTP Request: PASS azerty
9 0.472637 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 230 User ZZZZZZZZZZZZ logged in.
10 0.613901 XX.XX.XX.XX YY.YY.YY.YY FTP Request: SYST
11 0.614071 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 215 UNIX Type: L8
12 0.785961 XX.XX.XX.XX YY.YY.YY.YY FTP Request: FEAT
13 0.786095 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 211-Features:
14 0.786117 YY.YY.YY.YY XX.XX.XX.XX FTP Response: MDTM
15 0.935781 XX.XX.XX.XX YY.YY.YY.YY TCP gxs-data-port > ftp [ACK] Seq=46 Ack=142 Win=65394 Len=0
16 0.935796 YY.YY.YY.YY XX.XX.XX.XX FTP Response: REST STREAM
17 1.102095 XX.XX.XX.XX YY.YY.YY.YY FTP Request: PWD
18 1.102398 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 257 "/" is current directory.
19 1.250290 XX.XX.XX.XX YY.YY.YY.YY FTP Request: TYPE A
20 1.250426 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 200 Type set to A
21 1.409232 XX.XX.XX.XX YY.YY.YY.YY FTP Request: PASV
22 1.409605 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 227 Entering Passive Mode (YY,YY,YY,YY,2
23 1.552179 XX.XX.XX.XX YY.YY.YY.YY FTP Request: LIST
24 1.593084 YY.YY.YY.YY XX.XX.XX.XX TCP ftp > gxs-data-port [ACK] Seq=274 Ack=71 Win=5840 Len=0
25 52.132002 XX.XX.XX.XX YY.YY.YY.YY TCP gxs-data-port > ftp [RST, ACK] Seq=71 Ack=274 Win=0 Len=0
-------------------------------------------------------------------------------------

Et voici les trames quand tout fonctionne bien :

-------------------------------------------------------------------------------------
No. Time Source Destination Protocol Info
1 0.000000 XX.XX.XX.XX YY.YY.YY.YY TCP biolink-auth > ftp [SYN] Seq=0 Win=65535 Len=0 MSS=1452 WS=3 TSV=0 TSER=0
2 0.000035 YY.YY.YY.YY XX.XX.XX.XX TCP ftp > biolink-auth [SYN, ACK] Seq=0 Ack=1 Win=5840 Len=0 MSS=1460 WS=2
3 0.053506 XX.XX.XX.XX YY.YY.YY.YY TCP biolink-auth > ftp [ACK] Seq=1 Ack=1 Win=372296 Len=0
4 0.054482 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 220 FTP Server ready.
5 0.109015 XX.XX.XX.XX YY.YY.YY.YY FTP Request: USER ZZZZZZZZZ
6 0.109044 YY.YY.YY.YY XX.XX.XX.XX TCP ftp > biolink-auth [ACK] Seq=24 Ack=21 Win=5840 Len=0
7 0.109501 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 331 Password required for ZZZZZZZZZZZZ.
8 0.163522 XX.XX.XX.XX YY.YY.YY.YY FTP Request: PASS azerty
9 0.174532 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 230 User dl-pge-client logged in.
10 0.228532 XX.XX.XX.XX YY.YY.YY.YY FTP Request: SYST
11 0.228695 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 215 UNIX Type: L8
12 0.282281 XX.XX.XX.XX YY.YY.YY.YY FTP Request: FEAT
13 0.282408 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 211-Features:
14 0.282430 YY.YY.YY.YY XX.XX.XX.XX FTP Response: MDTM
15 0.337011 XX.XX.XX.XX YY.YY.YY.YY TCP biolink-auth > ftp [ACK] Seq=46 Ack=142 Win=372152 Len=0
16 0.337025 YY.YY.YY.YY XX.XX.XX.XX FTP Response: REST STREAM
17 0.392871 XX.XX.XX.XX YY.YY.YY.YY FTP Request: PWD
18 0.393496 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 257 "/" is current directory.
19 0.448852 XX.XX.XX.XX YY.YY.YY.YY FTP Request: TYPE I
20 0.449109 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 200 Type set to I
21 0.502950 XX.XX.XX.XX YY.YY.YY.YY FTP Request: PASV
22 0.503364 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 227 Entering Passive Mode (YY,YY,YY,YY,2
23 0.560055 XX.XX.XX.XX YY.YY.YY.YY FTP Request: LIST
24 0.600810 YY.YY.YY.YY XX.XX.XX.XX TCP ftp > biolink-auth [ACK] Seq=273 Ack=71 Win=5840 Len=0
25 0.612740 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 150 Opening ASCII mode data connection for
26 0.668824 YY.YY.YY.YY XX.XX.XX.XX FTP Response: 226 Transfer complete.
27 0.722869 XX.XX.XX.XX YY.YY.YY.YY TCP biolink-auth > ftp [ACK] Seq=71 Ack=351 Win=371944 Len=0
-------------------------------------------------------------------------------------

Pour ma part cela ne m'éclaire pas plus...