425 Possible PASV port theft, cannot open data connection.

ultrahive · 08-23-2002, 10:08 AM

Hello All,

My first big problem ever with FlashFXP! I hop you can help me out.

The Logfile:

[16:43:29] Connecting to NLMstr2002
[16:43:29] Connected to da1.****.net Port 24863
[16:43:29] Ident Request: 193.**.12.***
[16:43:30] 220--> Please login with user anonymous or ftp to access our archive <-
[16:43:30] 220-
[16:43:30] 220 ftp.abcd.nl FTP server ready.
[16:43:30] USER sonichive
[16:43:30] 331 Guest login ok, send your complete e-mail address as password.
[16:43:30] PASS (hidden)
[16:43:30] 230-
[16:43:30] 230-
[16:43:30] 230- Archive ftp.abcd.nl
[16:43:30] 230-
[16:43:30] 230-Welcome to the ftp.abcd.nl archive, which now resides on a
[16:43:30] 230-couple of SUN Ultraservers running Solaris.
[16:43:30] 230-
[16:43:30] 230-You are user number 16 out of a possible total of 500 in your class.
[16:43:30] 230-
[16:43:30] 230-You may now also use WWW (http://ftp.abcd.nl/) or e-mail to
[16:43:30] 230-ftpmail@ftp.abcd.nl to access this archive. See README.access.methods
[16:43:30] 230-for more info on this.
[16:43:30] 230-
[16:43:30] 230-This system may be used 24 hours a day, 7 days a week. The local
[16:43:30] 230-time is Fri Aug 23 16:43:24 2002.
[16:43:30] 230-
[16:43:30] 230-All transfers are logged with your host name and whatever you entered
[16:43:30] 230-for the password.
[16:43:30] 230-
[16:43:30] 230 Guest login ok, access restrictions apply.
[16:43:30] SYST
[16:43:30] 215 UNIX Type: L8
[16:43:30] REST 100
[16:43:30] 350 Restarting at 100. Send STORE or RETRIEVE to initiate transfer.
[16:43:30] REST 0
[16:43:31] 350 Restarting at 0. Send STORE or RETRIEVE to initiate transfer.
[16:43:31] PWD
[16:43:31] 257 "/" is current directory.
[16:43:31] TYPE A
[16:43:31] 200 Type set to A.
[16:43:31] PASV
[16:43:31] 227 Entering Passive Mode (194,**,**,20,175,104)
[16:43:31] LIST
[16:43:31] 425 Possible PASV port theft, cannot open data connection.
[16:44:20] QUIT
[16:44:20] 221-You have transferred 0 bytes in 0 files.
[16:44:20] 221-Total traffic for this session was 2962 bytes in 0 transfers.
[16:44:20] 221-Thank you for using the FTP service on ftp.abcd.nl.
[16:44:20] 221 Goodbye.
[16:44:20] Logged off: NLMstr2002

====

As you can read, 425 Possible PASV port theft, cannot open data connection. Im wondering what this could be.

This is the only site I'm having problems with. I have a 512 kbit/s modem. No router, nor ICS. just a normal cable modem.

with not passive on. (active mode) I got this error
====

[16:51:29] 257 "/" is current directory.
[16:51:29] TYPE A
[16:51:29] 200 Type set to A.
[16:51:29] PORT 62,**,**,**,5,15
[16:51:30] 500 Illegal PORT Command
[16:51:30] LIST
[16:51:30] 425 Can't build data connection: Connection refused.
[16:51:46] QUIT
[16:51:46] 221-You have transferred 0 bytes in 0 files.
[16:51:46] 221-Total traffic for this session was 2953 bytes in 0 transfers.
[16:51:46] 221-Thank you for using the FTP service on ftp.acbde.nl
[16:51:46] 221 Goodbye.

====

My conclusions: I'm getting the same error as I would get when having a badly configured firewall, router or ICS setup. but this doesn't apply on my case.

I would like to know how I could handle this problem. How to find step by step out who's blocking my data streams.

Refers:
http://www.slacksite.com/other/ftp.html#summary (active passive)
http://www.smart*ftp.com/support/kb/?a=view&id=59 (425)

FlashFXP 1.4 (build 800)

System info:
MS Win 98 SE
4.10.2222.A

PC:
GenuineIntel
x86 Family Model 8 Stepping 6
511.0 mb ram

Software:
ZoneAlarm (I turned it off)

I really hope you can help me out with this port theft,

Thanks in advance !

HiVe

MxxCon · 08-23-2002, 02:12 PM

hmm..that's pretty funny

Quote:

[16:43:31] PASV
[16:43:31] 227 Entering Passive Mode (194,**,**,20,175,104)
[16:43:31] LIST
[16:43:31] 425 Possible PASV port theft, cannot open data connection.

you ask server to tell you which port to connect to, but then it complain about port theft

to me it seems like that server is misconfigured...