Re: reality check: passive FTP

[Andrew Miehs <andrew@2sheds.de>]

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Hmmm - First problem - what ISP uses Microsoft?! ^^

But seriously, try using active FTP - maybe he is dropping all  
packets with dest port > 1023? Are you going through a gateway which  
is NATing your packets?

Andrew




On 29/08/2006, at 8:25 PM, martin f krafft wrote:

>   0.047752 remote -> local  FTP Response: 220 web2 Microsoft FTP  
> Service (Version 5.0).
>   0.047918  local -> remote TCP 46667 > 21 [ACK] Seq=1 Ack=48  
> Win=5888 Len=0 TSV=4666874 TSER=5920474
>   0.048021  local -> remote FTP Request: USER XXXXXXXX
>   0.087749 remote -> local  FTP Response: 331 Password required for  
> XXXXXXXX.
>   0.087994  local -> remote FTP Request: PASS YYYYYYYY
>   0.116722 remote -> local  FTP Response: 230-FTP LCM WEB2
>   0.156453  local -> remote TCP 46667 > 21 [ACK] Seq=29 Ack=102  
> Win=5888 Len=0 TSV=4666901 TSER=5920476
>   0.179720 remote -> local  FTP Response: 230 User XXXXXXX logged in.
>   0.179899  local -> remote TCP 46667 > 21 [ACK] Seq=29 Ack=131  
> Win=5888 Len=0 TSV=4666907 TSER=5920476
>   0.180013  local -> remote FTP Request: PWD
>   0.222725 remote -> local  FTP Response: 257 "/XXXXXXX" is current  
> directory.
>   0.222999  local -> remote FTP Request: FEAT
>   0.245703 remote -> local  FTP Response: 500 'FEAT': command not  
> understood
>   0.245906  local -> remote FTP Request: HELP SITE
>   0.278718 remote -> local  FTP Response: 214 Syntax: SITE (site- 
> specific commands)
>   0.279064  local -> remote FTP Request: CLNT NcFTP 3.1.9 linux-x86_64
>   0.301696 remote -> local  FTP Response: 500 'CLNT NcFTP 3.1.9  
> linux-x86_64': command not understood
>   0.340466  local -> remote TCP 46667 > 21 [ACK] Seq=82 Ack=309  
> Win=5888 Len=0 TSV=4666947 TSER=5920477
>  23.286210  local -> remote FTP Request: PASV
>  23.309130 remote -> local  FTP Response: 227 Entering Passive Mode  
> (212,117,207,139,5,175).
>  23.309355  local -> remote TCP 46667 > 21 [ACK] Seq=88 Ack=361  
> Win=5888 Len=0 TSV=4672689 TSER=5920707
>  23.311491  local -> remote TCP 38486 > 1455 [SYN] Seq=0 Ack=0  
> Win=5840 Len=0 MSS=1460 TSV=4672689 TSER=0 WS=7
>  26.312900  local -> remote TCP 38486 > 1455 [SYN] Seq=0 Ack=0  
> Win=747520 Len=0 MSS=1460 TSV=4673439 TSER=0 WS=7
>  32.313003  local -> remote TCP 38486 > 1455 [SYN] Seq=0 Ack=0  
> Win=747520 Len=0 MSS=1460 TSV=4674939 TSER=0 WS=7
>  43.313278  local -> remote FTP Request: LIST
>  43.531005 remote -> local  TCP 21 > 46667 [ACK] Seq=361 Ack=94  
> Win=17331 Len=0 TSV=5920910 TSER=4677689
>  44.313204  local -> remote TCP 38486 > 1455 [SYN] Seq=0 Ack=0  
> Win=747520 Len=0 MSS=1460 TSV=4677939 TSER=0 WS=7
>  55.444176 remote -> local  FTP Response: 425 Can't open data  
> connection.
>  55.444390  local -> remote TCP 46667 > 21 [ACK] Seq=94 Ack=394  
> Win=5888 Len=0 TSV=4680722 TSER=5921028

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