pure-ftpd on 64bit crux

jakub samek jakub at clevis.cz
Wed Jul 1 20:05:44 UTC 2009


thanks, you are right I mixed when I was writing the mail.

So I will look closer why port 20 doesnt work as I excepted, thanks 
again and sorry for these a bit non-crux messages :)

best regards, jakub samek

Juergen Daubert wrote:
> On Wed, Jul 01, 2009 at 06:55:31PM +0200, jakub samek wrote:
>> hello!
> 
> Hello Jakub,
> 
>> I use Hannes Mayer's 64bit CRUX 2.5, almost all packages up to date.
>> I have problem with pure-ftpd, it compiles and runs fine, active ftp
>> connections are without problem (for example totalcommander in
>> windows, or builtin' ftp client in mc) but when somebody tries to
>> use passive connection (for example standrard ftp command) it
>> fails.. (but login is ok).
> 
> I think you're mixing the things up. mc always use ftp in passive-mode,
> while the commandline ftp client from core/inetutils can only work in
> active-mode, meaning ftp data are send on port 20, the regular ftp 
> protocol on port 21. The data connection is only established if data
> needs to be transfered, for directory listings for example.
> 
>> here is how it looks:
>>
>> jakub at pIII ~]ftp olpc.cz
>> Connected to olpc.cz.
>> 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
>> 220-You are user number 1 of 50 allowed.
>> 220-Local time is now 17:56. Server port: 21.
>> 220-This is a private system - No anonymous login
>> 220-IPv6 connections are also welcome on this server.
>> 220 You will be disconnected after 15 minutes of inactivity.
>> Name (olpc.cz:jakub): olpc.cz
>> 331 User olpc.cz OK. Password required
>> Password:
>> 230-User olpc.cz has group access to: sites
>> 230 OK. Current restricted directory is /
>> Remote system type is UNIX.
>> Using binary mode to transfer files.
>> ftp> ls
>> 500 I won't open a connection to 0.0.0.0 (only to 81.0.199.230)
>> ftp: bind: Address already in use
>> ftp>
>> jakub at pIII ~]
>>
> 
> So port 21 works and obviously port 20, the data channel, not. 
> Looks more like a network (firewall, NAT) problem to me than an 
> issue with pure-ftpd. 
> 
> Using opt/lftp might be helpful, it can work in both ftp modes, 
> controlled via the setting ftp:passive-mode. Start it with the
> -d option to get a protocol trace.
> 
>> It's probably crux problem, because it works on other 64bit linux distros.
> 
> Probably not ;-)
> 
> 
> HTH
> Juergen
> 



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