Pure-FTPD serverside PASV mode

[IzFazt]

Server: CentOS 5.3
Controlepaneel: IPSconfig nieuwste versie 3.0.1.3
FTP-pakket Pure-FTPD

Instellingen pure-FTPD.conf PassivePortts gedefinieerd op 42000-42010
Max users op 5
Firewall staat open op die poorten

De eerste gebruiker kan normaal werken. De tweede gebruiker (in dit geval gebruikt hij aceFTP client software) komt in een hang/loop en krijgt geen vervinding in PASV mode.

Wie weet waaraan dat ligt en wat hier precies gebeurd serverside en wat de foute instelling is? Als passive mode wordt uitgezet werkt het vanzelfsprekend wel, maar dat is niet het plan.

Connecting to jl-websites.discounthost.biz on port 121. Attempt 1 of 3...
220---------- Welcome to Pure-FTPd [TLS ----------
220-You are user number 2 of 5 allowed.
220-Local time is now 00:10. Server port: 121.
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.
USER leppers001
331 User leppers001 OK. Password required
PASS *****
230-User leppers001 has group access to: client4
230 OK. Current restricted directory is /
SYST
215 UNIX Type: L8
Server Type: UNIX (standard)
FEAT
211-Extensions supported:
EPRT
IDLE
MDTM
SIZE
REST STREAM
MLST type*;size*;sizd*;modify*;UNIX.mode*;UNIX.uid*;UNIX.gid*;unique*;
MLSD
ESTP
PASV
EPSV
SPSV
ESTA
AUTH TLS
PBSZ
PROT
UTF8
211 End.
PWD
257 "/" is your current location
TYPE A
200 TYPE is now ASCII
PASV
227 Entering Passive Mode (192,168,1,4,164,25)
Operation timed out
Processing item, attempt 2...
PASV
227 Entering Passive Mode (192,168,1,4,164,22)
Operation timed out
Processing item, attempt 3...
PASV
227 Entering Passive Mode (192,168,1,4,164,24)
Operation timed out
Failed timed out
PASV
227 Entering Passive Mode (192,168,1,4,164,23)
Operation timed out
Processing item, attempt 2...
PASV
227 Entering Passive Mode (192,168,1,4,164,18)
Operation timed out
Processing item, attempt 3...
PASV
227 Entering Passive Mode (192,168,1,4,164,21)
Operation timed out
Failed timed out
PASV
227 Entering Passive Mode (192,168,1,4,164,19)
Operation timed out
Processing item, attempt 2...
PASV
227 Entering Passive Mode (192,168,1,4,164,21)
Operation timed out
Processing item, attempt 3...
PASV
227 Entering Passive Mode (192,168,1,4,164,17)
Operation timed out
Failed timed out
PASV
227 Entering Passive Mode (192,168,1,4,164,17)
Operation timed out
Processing item, attempt 2...
PASV
227 Entering Passive Mode (192,168,1,4,164,16)