Hi! I have a problem with my fpt server. When i upload, download or remove files on the server i keep getting disconnected. For example, when uploading Joomla to one of my web sites i get dissconected repetedly. Code: Command: DELE components.php Response: 250 DELE command successful Command: CWD /web/administrator/components/com_installer/ Response: 250 CWD command successful Command: PWD Response: 257 "/web/administrator/components/com_installer" is current directory. Command: RMD models Response: 250 RMD command successful Status: Retrieving directory listing... Command: CWD views Response: 250 CWD command successful Command: PWD Response: 257 "/web/administrator/components/com_installer/views" is current directory. Command: PASV Response: 227 Entering Passive Mode (217,151,53,162,148,109). Command: LIST Response: 150 Opening ASCII mode data connection for file list Response: 226 Transfer complete. Status: Directory listing successful Command: DELE index.html Response: 250 DELE command successful Status: Retrieving directory listing... Command: CWD components Response: 250 CWD command successful Command: PWD Response: 257 "/web/administrator/components/com_installer/views/components" is current directory. Command: PASV [COLOR="Red"]Error: Disconnected from server Error: Failed to retrieve directory listing[/COLOR] I run proftpd on my server in SSL/TLS mode, and use FileZilla for the uploading. I can for the life of me not figure out what is wrong. PROFTPD.CONF Code: # # /etc/proftpd/proftpd.conf -- This is a basic ProFTPD configuration file. # To really apply changes reload proftpd after modifications. # # Includes DSO modules Include /etc/proftpd/modules.conf # Set off to disable IPv6 support which is annoying on IPv4 only boxes. UseIPv6 off DefaultRoot ~ IdentLookups off ServerIdent on "FTP Server ready." ServerName "Debian" ServerType standalone DeferWelcome off MultilineRFC2228 on DefaultServer on ShowSymlinks on TimeoutNoTransfer 600 TimeoutStalled 600 TimeoutIdle 1200 DisplayLogin welcome.msg DisplayFirstChdir .message ListOptions "-l" DenyFilter \*.*/ # Use this to jail all users in their homes # DefaultRoot ~ # Users require a valid shell listed in /etc/shells to login. # Use this directive to release that constrain. # RequireValidShell off # Port 21 is the standard FTP port. Port 21 # In some cases you have to specify passive ports range to by-pass # firewall limitations. Ephemeral ports can be used for that, but # feel free to use a more narrow range. # PassivePorts 49152 65534 PassivePorts 37990 38000 # If your host was NATted, this option is useful in order to # allow passive tranfers to work. You have to use your public # address and opening the passive ports used on your firewall as well. MasqueradeAddress 217.151.53.162 # To prevent DoS attacks, set the maximum number of child processes # to 30. If you need to allow more than 30 concurrent connections # at once, simply increase this value. Note that this ONLY works # in standalone mode, in inetd mode you should use an inetd server # that allows you to limit maximum number of processes per service # (such as xinetd) MaxInstances 30 # Set the user and group that the server normally runs at. User proftpd Group nogroup # Umask 022 is a good standard umask to prevent new files and dirs # (second parm) from being group and world writable. Umask 022 022 # Normally, we want files to be overwriteable. AllowOverwrite on # Uncomment this if you are using NIS or LDAP to retrieve passwords: # PersistentPasswd off # Be warned: use of this directive impacts CPU average load! # Uncomment this if you like to see progress and transfer rate with ftpwho # in downloads. That is not needed for uploads rates. # # UseSendFile off # Choose a SQL backend among MySQL or PostgreSQL. # Both modules are loaded in default configuration, so you have to specify the backend # or comment out the unused module in /etc/proftpd/modules.conf. # Use 'mysql' or 'postgres' as possible values. # #<IfModule mod_sql.c> # SQLBackend mysql #</IfModule> TransferLog /var/log/proftpd/xferlog SystemLog /var/log/proftpd/proftpd.log <IfModule mod_tls.c> TLSEngine on TLSLog /var/log/proftpd/tls.log TLSProtocol SSLv23 TLSOptions NoCertRequest TLSRSACertificateFile /etc/proftpd/ssl/proftpd.cert.pem TLSRSACertificateKeyFile /etc/proftpd/ssl/proftpd.key.pem TLSVerifyClient off TLSRequired off </IfModule> <IfModule mod_quota.c> QuotaEngine on </IfModule> <IfModule mod_ratio.c> Ratios on </IfModule> # Delay engine reduces impact of the so-called Timing Attack described in # http://security.lss.hr/index.php?page=details&ID=LSS-2004-10-02 # It is on by default. <IfModule mod_delay.c> DelayEngine on </IfModule> <IfModule mod_ctrls.c> ControlsEngine on ControlsMaxClients 2 ControlsLog /var/log/proftpd/controls.log ControlsInterval 5 ControlsSocket /var/run/proftpd/proftpd.sock </IfModule> <IfModule mod_ctrls_admin.c> AdminControlsEngine on </IfModule> # A basic anonymous configuration, no upload directories. # <Anonymous ~ftp> # User ftp # Group nogroup # # We want clients to be able to login with "anonymous" as well as "ftp" # UserAlias anonymous ftp # # Cosmetic changes, all files belongs to ftp user # DirFakeUser on ftp # DirFakeGroup on ftp # # RequireValidShell off # # # Limit the maximum number of anonymous logins # MaxClients 10 # # # We want 'welcome.msg' displayed at login, and '.message' displayed # # in each newly chdired directory. # DisplayLogin welcome.msg # DisplayFirstChdir .message # # # Limit WRITE everywhere in the anonymous chroot # <Directory *> # <Limit WRITE> # DenyAll # </Limit> # </Directory> # # # Uncomment this if you're brave. # # <Directory incoming> # # # Umask 022 is a good standard umask to prevent new files and dirs # # # (second parm) from being group and world writable. # # Umask 022 022 # # <Limit READ WRITE> # # DenyAll # # </Limit> # # <Limit STOR> # # AllowAll # # </Limit> # # </Directory> # # </Anonymous> DefaultRoot ~ #Include /etc/proftpd_ispconfig.conf Any ideas what may cause this disconnecting issue? FileZilla is more or less at it's default settings. My server is installed using this guide, http://www.howtoforge.com/perfect_setup_ubuntu704 I have also installed ISPConfig and Webmin on the server, and activated SSL/TLS using this guide, http://www.howtoforge.com/proftpd-tls-debian-etch
After scanning the ftp logs, i found this in proftpd.log Code: Apr 09 18:23:21 ws1.allsoftstudios.com proftpd[5159] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP session closed. Apr 09 18:23:44 ws1.allsoftstudios.com proftpd[5168] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP no transfer timeout, disconnected Apr 09 18:23:44 ws1.allsoftstudios.com proftpd[5168] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP session closed. Apr 09 18:23:48 ws1.allsoftstudios.com proftpd[5167] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP no transfer timeout, disconnected Apr 09 18:23:48 ws1.allsoftstudios.com proftpd[5167] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP session closed. Apr 09 18:23:52 ws1.allsoftstudios.com proftpd[5166] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP no transfer timeout, disconnected Apr 09 18:23:52 ws1.allsoftstudios.com proftpd[5166] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP session closed. Apr 09 18:24:02 ws1.allsoftstudios.com proftpd[5173] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP no transfer timeout, disconnected Apr 09 18:24:02 ws1.allsoftstudios.com proftpd[5173] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP session closed. Apr 09 18:24:11 ws1.allsoftstudios.com proftpd[5178] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP no transfer timeout, disconnected Apr 09 18:24:11 ws1.allsoftstudios.com proftpd[5178] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP session closed. Apr 09 18:24:15 ws1.allsoftstudios.com proftpd[5179] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): Passive data transfer failed, possibly due to network issues Apr 09 18:24:15 ws1.allsoftstudios.com proftpd[5179] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): Check your PassivePorts and MasqueradeAddress settings, Apr 09 18:24:15 ws1.allsoftstudios.com proftpd[5179] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): and any router, NAT, and firewall rules in the network path. Apr 09 18:24:15 ws1.allsoftstudios.com proftpd[5179] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP no transfer timeout, disconnected Apr 09 18:24:15 ws1.allsoftstudios.com proftpd[5179] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP session closed. Apr 09 18:30:01 ws1.allsoftstudios.com proftpd[5424] ws1.allsoftstudios.com (localhost.localdomain[127.0.0.1]): FTP session opened. Apr 09 18:30:01 ws1.allsoftstudios.com proftpd[5424] ws1.allsoftstudios.com (localhost.localdomain[127.0.0.1]): FTP session closed. Apr 09 18:32:32 ws1.allsoftstudios.com proftpd[5284] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP no transfer timeout, disconnected Apr 09 18:32:32 ws1.allsoftstudios.com proftpd[5284] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP session closed. Apr 09 19:00:01 ws1.allsoftstudios.com proftpd[5798] ws1.allsoftstudios.com (localhost.localdomain[127.0.0.1]): FTP session opened. Apr 09 19:00:01 ws1.allsoftstudios.com proftpd[5798] ws1.allsoftstudios.com (localhost.localdomain[127.0.0.1]): FTP session closed. Seems proftpd keep closing the connection for no transfer timeout, even though i am in the middle of an upload session. Here's another error i get in the middle of an upload... Code: Apr 09 19:27:00 ws1.allsoftstudios.com proftpd[6269] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP session opened. Apr 09 19:27:00 ws1.allsoftstudios.com proftpd[6269] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): USER web1_allmight: Login successful. Apr 09 19:27:00 ws1.allsoftstudios.com proftpd[6269] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): Preparing to chroot to directory '/var/www/web1' Apr 09 19:27:00 ws1.allsoftstudios.com proftpd[6269] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): mod_delay/0.5: delaying for 677 usecs Apr 09 19:27:08 ws1.allsoftstudios.com proftpd[6272] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP session opened. Apr 09 19:27:08 ws1.allsoftstudios.com proftpd[6272] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): USER web1_allmight: Login successful. Apr 09 19:27:08 ws1.allsoftstudios.com proftpd[6272] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): Preparing to chroot to directory '/var/www/web1' Apr 09 19:27:08 ws1.allsoftstudios.com proftpd[6272] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): mod_delay/0.5: delaying for 924 usecs Apr 09 19:27:23 ws1.allsoftstudios.com proftpd[6275] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): FTP session opened. Apr 09 19:27:23 ws1.allsoftstudios.com proftpd[6275] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): mod_delay/0.5: delaying for 10 usecs Apr 09 19:27:23 ws1.allsoftstudios.com proftpd[6275] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): USER web1_allmight: Login successful. Apr 09 19:27:23 ws1.allsoftstudios.com proftpd[6275] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): Preparing to chroot to directory '/var/www/web1' Apr 09 19:27:23 ws1.allsoftstudios.com proftpd[6275] ws1.allsoftstudios.com (217.151.53.164[217.151.53.164]): mod_delay/0.5: delaying for 24 usecs Apr 09 19:27:32 ws1.allsoftstudios.com proftpd[6150] ws1.allsoftstudios.com: MaxInstances (30) reached, new connection denied Apr 09 19:27:37 ws1.allsoftstudios.com proftpd[6150] ws1.allsoftstudios.com: MaxInstances (30) reached, new connection denied Apr 09 19:27:42 ws1.allsoftstudios.com proftpd[6150] ws1.allsoftstudios.com: MaxInstances (30) reached, new connection denied Apr 09 19:27:47 ws1.allsoftstudios.com proftpd[6150] ws1.allsoftstudios.com: MaxInstances (30) reached, new connection denied Apr 09 19:27:47 ws1.allsoftstudios.com proftpd[6150] ws1.allsoftstudios.com: MaxInstances (30) reached, new connection denied Apr 09 19:27:52 ws1.allsoftstudios.com proftpd[6150] ws1.allsoftstudios.com: MaxInstances (30) reached, new connection denied Apr 09 19:27:52 ws1.allsoftstudios.com proftpd[6150] ws1.allsoftstudios.com: MaxInstances (30) reached, new connection denied MaxInstances (30) reached, new connection denied, what does this mean? When it happens, the client is unable to reconnect and resume upload. And the passive ports are opened in the firewall. I mean, i can connect in passive mode, and upload/download just fine. Just that i get disconnected all the time.
Okay, seems i get the exact same problem with vsftpd. I get disconnected all the time. I can live with it during uploads since the client reconnects automatically and continues. But when i am deleting large amounts of files over ftp, i get disconnected every 4 seconds or so, and have to reconnect manually and manually start the delete process again. The disconnection part is not after a specific command, but happens at random places during the process. I get the same with both proftpd and vsftpd. I use FileZilla. Same server setup as specified in the first post, just changed from proftpd to vsftpd. Anyone know what's going on here, and how to remedy this problem?
@Falko Yes, the iptables firewall is on the server, and the server itself it connected directly to the internet. No router in between. I have tried both Active and Inactive. But in Active i cannot even get a complete connection to the server, get stuck at the LIST part of the login, as you may remember from another post. @Chipsafts No, i havn't. My personal computer is a Vista one, and running under Windows you easily get spoiled by GUI tools. Don't even know how, if at all possible to run ftp over the console. In my router i have port maped port 20 and 21 and the passive ports to my computer. Note, personally, i am behind a router, but the server is not.
This is my current iptables setup... Code: Chain INPUT (policy DROP) target prot opt source destination ACCEPT 0 -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT tcp -- anywhere anywhere tcp dpt:ftp-data ACCEPT tcp -- anywhere anywhere tcp dpt:ftp LOG_ACCEPT tcp -- anywhere anywhere tcp dpt:ssh LOG_ACCEPT tcp -- anywhere anywhere tcp dpt:smtp ACCEPT tcp -- anywhere anywhere tcp dpt:whois ACCEPT tcp -- anywhere anywhere tcp dpt:domain ACCEPT udp -- anywhere anywhere udp dpt:domain ACCEPT tcp -- anywhere anywhere tcp dpt:www ACCEPT tcp -- anywhere anywhere tcp dpt:81 ACCEPT tcp -- anywhere anywhere tcp dpt:pop3 ACCEPT tcp -- anywhere anywhere tcp dpt:imap2 ACCEPT tcp -- anywhere anywhere tcp dpt:https ACCEPT tcp -- anywhere anywhere tcp dpt:spamd ACCEPT tcp -- anywhere anywhere tcp dpt:imaps ACCEPT tcp -- anywhere anywhere tcp dpt:mysql ACCEPT tcp -- anywhere anywhere tcp dpt:webmin ACCEPT tcp -- anywhere anywhere tcp dpt:20000 ACCEPT tcp -- anywhere anywhere tcp dpts:37990:38000 ACCEPT 0 -- localhost.localdomain anywhere icmp_packets icmp -- anywhere anywhere LOG_DROP 0 -- anywhere anywhere Chain FORWARD (policy DROP) target prot opt source destination Chain OUTPUT (policy DROP) target prot opt source destination ACCEPT 0 -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT tcp -- anywhere anywhere tcp dpt:ftp-data ACCEPT tcp -- anywhere anywhere tcp dpt:ftp ACCEPT tcp -- anywhere anywhere tcp dpt:ssh ACCEPT tcp -- anywhere anywhere tcp dpt:telnet ACCEPT tcp -- anywhere anywhere tcp dpt:smtp ACCEPT tcp -- anywhere anywhere tcp dpt:whois ACCEPT tcp -- anywhere anywhere tcp dpt:domain ACCEPT udp -- anywhere anywhere udp dpt:domain ACCEPT tcp -- anywhere anywhere tcp dpt:www ACCEPT tcp -- anywhere anywhere tcp dpt:81 ACCEPT tcp -- anywhere anywhere tcp dpt:pop3 ACCEPT tcp -- anywhere anywhere tcp dpt:imap2 ACCEPT tcp -- anywhere anywhere tcp dpt:https ACCEPT tcp -- anywhere anywhere tcp dpt:spamd ACCEPT tcp -- anywhere anywhere tcp dpt:imaps ACCEPT tcp -- anywhere anywhere tcp dpt:mysql ACCEPT tcp -- anywhere anywhere tcp dpt:webmin ACCEPT tcp -- anywhere anywhere tcp dpt:20000 ACCEPT tcp -- anywhere anywhere tcp dpts:37990:38000 ACCEPT 0 -- anywhere localhost.localdomain icmp_packets icmp -- anywhere anywhere LOG_DROP 0 -- anywhere anywhere Chain LOG_ACCEPT (2 references) target prot opt source destination LOG 0 -- anywhere anywhere LOG level warning tcp-options ip-options prefix `[IPTABLES ACCEPT] : ' ACCEPT 0 -- anywhere anywhere Chain LOG_DROP (2 references) target prot opt source destination LOG 0 -- anywhere anywhere LOG level warning tcp-options ip-options prefix `[IPTABLES DROP] : ' DROP 0 -- anywhere anywhere Chain icmp_packets (2 references) target prot opt source destination ACCEPT icmp -- anywhere anywhere icmp echo-reply ACCEPT icmp -- ws1.allsoftstudios.com anywhere icmp echo-request DROP icmp -- anywhere anywhere icmp echo-request ACCEPT icmp -- anywhere anywhere icmp destination-unreachable ACCEPT icmp -- anywhere anywhere icmp time-exceeded
The ports 20 and 21 are open, so active FTP should work. Does it work when you completely disable the firewall?
No, it does'nt. However, if i connect my workstation directly to the internet, bypassing the router, then i can get active mode to work. I have maped port 20 and 21 to my local IP address in the router, so i don't know why it won't work when the router is in between. So it seems that problem is not on the server side, but on my workstation side. Regarding the disconnection problem i mentioned, i have figured out what caused that problem. It was the firewall in Vista that made my client disconnect frequently when large amounts of files were deleted, renamed and/or chmod'ed. If i disable the firewall on vista it works fine. And i really don't need that firewall since i am behind a router. But would be nice to figure out why the Vista firewall causes this behavior.
Hehe, maybe. Vista have it's moments, but also it's flaws. But unfortinitly can't go 100% Linux since i am a gamer, and dont like consoles. But since i have a router i can just disable the built in firewall. Anyway, thank's for taking the time, trying to help me.
