CentOS 5 Server :: Ncftp Stops Working In PASV Mode?
May 30, 2009
BAM your ftp doesn't work. Out of the blue my ftp connections stall when I ask for a directory listing. I am using ncftp as I have for several years. And after a long pause I get the answer:Data connection timed out.Falling back to PORT instead of PASV mode.I then get the listing and the connection continues in PORT mode. But not with FileZilla it just hangs. Also bit torrent no longer works. Set up is a home network of 6 machines reaching the internet through a linux firewall box, qwest DSL modem gt-701-gw. Nothing has changed but sometime in the last week something has changed because now FTP PASV and BIT TORRENT can no longer connect.
I am holding back from completely rewritting the iptables/shorewall rules and have spent the day with the website host 1 and 1 and Qwest. Trying to find a solution. This problem is universal, all machines (windoze and linux) and all software (coffeecup, ncftp, ftp, filezilla, bit torrent).
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Jan 11, 2010
My organization has been using PASV FTP via VSFTPD for some time now. We have defined the port range between 30000 and 33333 and as I mentioned, it has worked up to 20100108 (last Friday). It appears that VSFTPD is not negotiating the defined PASV port range, which we can see with both netstat and tcpdump. Has anyone here run into this before? Are there any VSFTPD hackers out there who know what mechanism VSFTPD is using to re-allocate the ports? I would think that it would release the port, and flag it as unused, or something.
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Aug 7, 2011
On my virtual server I had the same issue within the last three month. The postfix daemon stopped working suddenly and I don't know why. I can restart postfix normally and it's working normally for a couple of weeks until the next crash. Does anyone have the same problems with CentOS 5.6 and postfix?
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Nov 19, 2010
I want to use FTP client (for example ncftp) to connect in active mode. I have firewall (iptables) on my laptop and most of time I am behind rooter. With outgoing packets and with passive mode all is working fine.But some sites accept only active mode.I could open some port range in firewall and in rooter for active data packets, but I don't know how to solve security issues.So how should I correctly manage active ftp connection?
How can I set data port range when opening active connection with ncftp (or maybe another ftp client)?How can I limit that incoming connections to that ports range is accepted only by ncftp or else dropped?
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Jul 16, 2011
I am unable to use ncftp command I have defined all variables used. i have to copy the data to another server FTPS. When i am executing this command it is throwing error
ncftp -u : option unknown
I am copying total script what i am executing in my server. Please some one tell me is there any pistake in using the ncftp command , or tell me some other commands to copy data to remote server
BAK="/opt/DBbackups"
NOW=$(date +"%d-%m-%Y")
FTPU="username"
FTPP="password"
[code]....
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Nov 13, 2010
I'm running Ubuntu 10.10 Maverick Meerkat 64-bit on my desktop with a wired internet connection (with no firewall). For the past 2 days, I have observed that1. Firefox randomly throws up errors like "Problem loading page" whenever I click on a hyperlink. When I click on Reload, the page loads up just fine. This has been happening a lot recently..and I do not remember updating anything consciously. By the way, ipv6 is disabled in Firefox.2. The network stops working all of a sudden (usually indicated by the Firefox error). The Autho Eth0 indication is active, but I am unable to connect to any external machine.
3. Needless to say, this error is manifesting itself in apt-get as well. I get "something wicked happened" errors all the time, and am unable to download or install anything.That this is not a problem with the ISP is obvious because I also have Windows (from which I'm typing this, ironically), which is able to access the internet.Is this a bug in Ubuntu 10.10?
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Sep 14, 2009
The system always boot up in Graphic Mode. After installation of Web Server, I want to disable Graphic Mode and change it to boot to Text Mode to save memory. Is there a way to disable graphic mode?
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Aug 6, 2009
i have installed latest skype-2.0.0.72-centos.i586.rpm from the skype website. i have installed it at a datacentre which runs in headless mode the procedure i followed to start skype is
i)Xvfb :1 -screen 0 800x600x24 &
ii)export DISPLAY=localhost:1.0
iii)echo skypeusername skypepw | skype --pipelogin &
it seems the skype not working as i was unable to see this user's status as logged in from another skype account on a different system the architecture is: CentOS release 5.3 (Final) uname -r : kernel- .6.18-128.1.6.el5 uname -a: Linux localhost.localdomain 2.6.18-128.1.6.el5 #1 SMP Wed Apr 1 09:19:18 EDT 2009 i686 i686 i386 GNU/Linux
[Code]...
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Mar 22, 2010
I installed Centos 5.4 on my Pentium E5300 new comp, but I need IPX support in my work. It's simple - ipxutils and ncpfs from Fedora Core and new kernel with ipx support. I copied kernel config from /boot folder and activate ipx, ntfs support, and choose processor core 2 duo. New kernel (2.6.26) works OK, but I got one problem - when start it still shows message: "kernel: HUB 1.0:1.0 unable to enumerate USB device on port 1 (or 2, 3)" and stops after logging (text mode)
I got 2 USB devices connected - printer HP D5160 PhotoSmart and Scanner A3 USB Mustek, and I know scanner cause that messages but I don't understand why. Kernel config is the same like that from distro kernel (almost - ipx, ntfs and proc), but distro kernel doesn't do that. So I got 2 questions:
1. Why
2. What to do to stop that (disconnecting devices on boot time is not a solution)
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Apr 24, 2009
after a update to 5.3 from 5.2 via the built in updater the system stops responding to visitors from the outside, http that is, but heres the odd part, if i say run firefox on the server the connection works also for some reason if i'm on the network with my own computer the connection seems to stay open but as soon as i stop using these the server seems to drop the conenctions, but as i said as soon as i go via my comp to the server via say ie it works right away.
this i tried yesterday:did a cold boot to see if some update had problems and actually needed a reboot even if the updater didn't say, after it started the connection seemed to be open for a good while, and not untill this morning from a outside source the connection is droped again, not been on my comp nor logged on on the server today yet.the install only has on it what i got from the dvd, and as far as i know it has all the updates on it since 5.3 came out.my network is built up like this:
modem
|
firewall-switch-computers
[code]....
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Feb 6, 2010
i did install opensuse and everything ok; i did configure it to be the server and gateway for a little office network Everything seems to be ok most of the time but sometimes (usually between 5 and 7 pm each day) internet stops working and there is no way to let it start again. So i turn off the suse, switch all cables to the old fedora server, just turn it on fedora and internet works. Turn off fedora, connect suse, let it start and everythng ok...it happens all the times
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Dec 4, 2010
I create and edit .htaccess file under /var/www/html/ directory, everything goes well as expected.
The corresponding snippet of /etc/httpd/conf/httpd.conf:
AccessFileName .htaccess
<VirtualHost *:80>
DocumentRoot /var/www/html/
ServerName www.abc.com
<Directory /var/www/html/>
AllowOverride AuthConfig
[Code]...
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Mar 28, 2010
My server was installed Centos 5.4 maximal. Now I want to remove packages which are unnecessary for security .
how to remove graphic mode on the server (include related packages)?
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Nov 4, 2010
I am trying to configure a ftp server (pure-ftp) where I am using CentOS 5.5.
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Oct 28, 2010
I'm having a peculiar problem. I have VSFTPD working and everything works great on my local network! The only problem is that I can't get PASV mode to work over the WAN.
I've tried everything:
- making sure the pasv_enable, pasv_min_port, and pasv_max_port variables are set in vsftpd.conf
- punching holes in Shorewall for these ports via rules
- setting up port forwarding for these ports in my routers (although this might be unnecessary)
The problem, is PASV mode works fine when I access from either router (my server is behind two routers but not from my WAN IP. Could this be a problem with my ISP?
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Feb 18, 2010
Many processes enter in disk sleep mode and stops (Hang) and return to work after 10 to 20 seconds.
In System Monitor i get "Disk Sleep" like this:
My PC specifications:
Ram: 4GB
Hard Disk: 1024GB
Processor: AMD Athlon II X2
Display: ATI HD 4670
Motherbord: Gigabyte
System: openSUSE 11.2 x86_64
The problem still exists after system update and i try run other distributions like kubuntu and i don't get this error. I also change Hard Disk but the problem is still ongoing.
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Jun 9, 2009
any one are implementing Transparent Cache in bridge mode. after googling i found article but its not working for me. any one have done this before ? [URL]
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Jun 13, 2011
I am an emacs user, and I noticed that on my new machine (running F15, 64bit) flyspell-mode will not work in tex mode.
I get errors that look something like this:
Code:
Spell-checking inequality-model.tex using hunspell with default dictionary...
Spell-checking region using hunspell with default dictionary...done
ispell-send-string: Process ispell not running
When done with a buffer, type C-x #
code....
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Mar 27, 2009
first of all, ill provide you with the package name i got [URL]...i went to /usr/src/redhat/SOURCES/bwbar-1.2.2 did ./configure ; make
then i get this problem : [root@server bwbar-1.2.2]# ./bwbar ./bwbar: /usr/local/lib/libpng12.so.0: no version information available (required by ./bwbar) i have installed libpng & libpng-devel
[Code]...
after looking around a bit i thought it would be better to get the sources from kernel.org directly and try to compile that one, but then i found it to have the exact same error. would be very nice if someone could direct me to a solution for this. i have the bwbar already installed on another server which runs CENTOS 4 , i installed it there AGES ago , so i dont really remember what was my method back then.
the CENTOS 5 server dose not like me installing bwbar on it for some reason. maybe its bwbar's fault?, im no coder so i hope anyone that got a clue could check this out for me.
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Mar 31, 2010
I installed the latest version of Centos 5.4.It came with Xen version 3.0.2 I think.I am running it on a Dell R510. It supports hardware virtualization.I was able to virtualize Windows XP and Windows 2003 server on it by selecting the install from DVD option.I was having problems trying to get a PCI DekTek card seen by the virtualized Windows domains so I tried to upgrade XEN to 3.4.2.I used the repos available from Gitmo and it went easy.
The only problem is now that when I try to create a "New virtual host" it only allows me to use HTTP, FTP option and not the iso or DVD option. They are greyed out. I was wondering if anyone has had this problem and might know a work around for the Xen 3.4.2 problem. Perhaps a better location for the kernel or something.
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Sep 4, 2009
I have been setup a PDC with samba+ldap, is working, smbldap-tools working, I can create users, add machines, etc, really cool.Now I have seen MDS from Mandriva, cool tool to handle my network, I try to setup MDS, but looks like something is not good. I have follow the instructions from their site, I access the web page, but went I input my username + password my browser wait for ever and never receive any answer. It suppose that u have input the LDAP username and password from the admin. I had run the mmc-agent daemon as stand alone to see what is doing, but I see any issue:
/usr/local/sbin/mmc-agent -d
mmc-agent 2.3.2 starting...
Using Python 2.4.3 (#1, Jul 27 2009, 17:57:39)
[code]....
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Jun 17, 2011
I've got Cent 5.6 using centos-ds.x86_64 8.1.0-1.el5.centos.2 installed via yum.
I turned on the memberof plugin, here's the section from dse.ldif:
I'm currently messing with the value on memberofgroupattr. The only thing that seems to do anything is with it set the way above, in the error log I get:
So if I'm understanding, it's trying to mod the user entry and the attribute isn't allowed.
Setting the memberofgroupattr to anything else gets me nothing noticeable. ldapsearch isn't showing memberof:
I've run the fixup-memberof.pl in /usr/lib64/dirsrv/slapd-hostname and I get:
I'm using ldapadmin from a Windows box to assign/delete people from groups. What I'm a little confused on is the difference between a group and a groupofuniquenames. I also see a difference when using the web gui (directory server gateway) in users. The gateway creates and entry while in ldapadmin I'm creating users. Not sure how that factors but the memberofgroupattr relies on what object class it is and I'm obviously trying the wrong things or something is busted elsewhere.
The error log isn't showing any other errors.
I can restart dirsrv just fine, nothing funny in the log when I do that:
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Dec 2, 2010
I'm no expert on DHCP. My problem is that i have a CentOS 5.5 server on which i want to install a DHCP server. I have two NICs where eth0 has access to the internet and where eth1 should act as an DHCP server.
I have installed dhcpd and this is how my dhcpd.conf file looks like.
Code:
ifconfig looks like this
Code:
When i start dhcpd on eth1 i get no error messages but when i connect any devices to eth1 they don't get any IP. I cant find anything in any logs about devices trying to get an IP address. I dont have any firewall rules in iptables.
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Aug 17, 2010
i use ncftp for some bash script action. how to delete oldest directory and oldest file using ncftp commands?
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Aug 31, 2009
OS: CentOS 5.3
vsftpd ver: vsftpd-2.0.5-12.el5_3.1
I installed vsftpd server in one of my servers using "yum install vsftpd" command. NFS server is running in the other server and mounted as "/data" in this FTP server. root in FTP server has also root authority in NFS server. All the files and sub-folders under "/data" in FTP server have 755 or 766 mode. Even I modified vsftpd setting to allow root login.
When I login as root to FTP server with FileZilla client, I can see all the file list in root home directory and move to /data directory. I can download any file in a local HDD but I can not download any file in /data directory.
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Jan 18, 2011
Is there a way to make ncftp hold the connection open longer than the default? a ping every 10 sec or something? I feel like after I push a change up to the server before I can verify everything is working as expected and get back into ncftp the connection is closed by the remote host.
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Feb 21, 2011
I have Ubuntu 10.10 and when I boot my PC I can see the following message: Ubuntu is running in low graphics mode and Ubuntu stops booting. I can-t boot in it I can only use command line.I think I accidentally uninstalled some packages clicking at completelly removal at some ipod utillities in synaptic.
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Apr 29, 2010
I installed CentOS 5.4 in a Virtualbox instance using the text mode installer. The GUI installer crashes. I chose the "Server (GUI)" option when installing the system, but upon completion of the install, I'm presented with a text mode login screen. Logging in as root drops me to a shell in text mode as I would expect.
What exactly IS "Server (GUI)?" I was thinking it would be a stripped down X11 desktop.
The main role of the Virtualbox instance is to run a server stack that we run on other CentOS machines, but I want Eclipse and perhaps just a few other GUI tools on it, without all the kitchen-sink crap that (I assume, coming from the Ubuntu world) comes with a "Desktop" install.
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Jul 18, 2011
I use my debian machine for masquerading, packet filtering anilar for a tiny network.It runs the latest debian testing.Every now and then (i am talking about weeks) the connection to my internet stops working.ifdown eth0; ifup eth0 brings it back.The other interface (eth1) is never effected.The odd thing is, there are no warnings, no messages .. nothing.I cant find any entry. Nothing in the logs, nothing in dmsg and no kernel panic.The only way to find out when it might have been happened is to search in several daemons log files,to find out when their first error connecting to the internet occurred.I ran memtest without any results.The nic is e1000 compatible.
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May 25, 2010
I am trying to figure out why yum on my server isn't working.Whenever I run a yum update it fails with a segmentation fault.
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