Tem que ver... mas o FTP funciona assim qndo vc conecta no server vc faz o login pela porta 21, depois disso vc estando conectado a ele e autenticado, qualquer comando que vc envie ele ira te responder por duas portas a 21 ea 20
olha o dump entre minha maquina eo server ftp do uol
Conectando:
Código :
10:32:00.014177 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:32:00.111476 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:32:00.111580 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:32:00.173270 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:32:00.173489 IP 192.168.0.65.42282 > 200.221.10.4.21:
Login:
Código :
10:33:43.342179 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:33:43.350469 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:33:43.352254 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:33:43.355444 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:33:43.360352 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:33:43.374115 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:33:43.415273 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:33:49.015783 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:33:49.030894 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:33:49.033356 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:33:49.033794 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:33:49.033825 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:33:49.046161 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:33:49.052554 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:33:49.058511 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:33:49.067440 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:33:49.108407 IP 192.168.0.65.42282 > 200.221.10.4.21:
Mandando um ls:
Código :
10:35:00.817010 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:35:00.888963 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:35:00.889167 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:35:00.889256 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:35:00.959287 IP 200.221.10.4.20 > 192.168.0.65.42283:
10:35:00.959409 IP 192.168.0.65.42283 > 200.221.10.4.20:
10:35:00.960352 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:35:00.991793 IP 200.221.10.4.20 > 192.168.0.65.42283:
10:35:00.993375 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:35:01.010669 IP 200.221.10.4.20 > 192.168.0.65.42283:
10:35:01.011226 IP 192.168.0.65.42283 > 200.221.10.4.20:
10:35:01.011544 IP 200.221.10.4.20 > 192.168.0.65.42283:
10:35:01.011807 IP 192.168.0.65.42283 > 200.221.10.4.20:
10:35:01.027365 IP 200.221.10.4.20 > 192.168.0.65.42283:
10:35:01.029139 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:35:01.029220 IP 192.168.0.65.42282 > 200.221.10.4.21:
Código :
Logoff:
10:35:20.353840 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:35:20.427282 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:35:20.428449 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:35:20.428590 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:35:20.429537 IP 200.221.10.4.21 > 192.168.0.65.42282:
10:35:20.429605 IP 192.168.0.65.42282 > 200.221.10.4.21:
10:35:20.506013 IP 200.221.10.4.21 > 192.168.0.65.42282: