Synchronet v3.19b-Win32 (install) has been released (Jan-2022).

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server:ftp [2010/02/21 19:58] – created digitalmanserver:ftp [2024/10/21 22:33] (current) – [sbbs.ini] Add NO_FTPS option digital man
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 ====== FTP Server ====== ====== FTP Server ======
  
-TODO+The Synchronet FTP Server is a native server ([[http://cvs.synchro.net/cgi-bin/viewcvs.cgi/src/sbbs3/ftpsrvr.c|written in C]]) which supports the [[wp>File Transfer Protocol|FTP]] and [[wp>FTPS]] TCP protocols for file transfer. 
 + 
 +===== Anonymous Logins ===== 
 +So-called "Anonymous FTP" logins (client-login using the user-ID "anonymous", "ftp", or "guest") are supported when the BBS user database contains a "Guest" user account. 
 + 
 +Traditionally, the user's email address is given as the password during "anonymous FTP" logins. To block specific email addresses from being used in this manner, add the address(es) to your ''[[dir:text]]/email.can'' file. 
 + 
 +===== Sysop Access ===== 
 + 
 +To login with system operator access, the user must login with a user account that 
 +has a security level of 90 or higher and provide a password of "//<user-pass>//://<sys-pass>//" where //<user-pass>// is the user's personal password and //<sys-pass>// is the system password as configured in [[util:SCFG]]->System. 
 + 
 +A successful sysop login will generate a login message stating "Sysop access granted".  
 + 
 +  230-Sysop access granted. 
 + 
 +Logging in with just a personal password will give the user/sysop normal (non-sysop) access. 
 + 
 +Sysop access allows the FTP user to mount local file systems and execute administrative commands via the FTP server. 
 + 
 +When logged-in with sysop access, the user has access to the following additional FTP commands: 
 +  SMNT 
 +  SITE EXEC 
 + 
 +==== Local File System Access ====   
 + 
 +Local file system access is enabled by default. Local file system access can be disabled with the ''NO_LOCAL_FSYS'' ''Options'' flag in the ''[FTP]'' section of the ''[[dir:ctrl]]/[[config:sbbs.ini]]'' file or by un-checking the "Local File System" checkbox in the [[monitor:sbbsctrl|Synchronet Control Panel]]->FTP->Configure dialog. 
 +  
 +When local file system access is enabled, a user with sysop access can "mount" a local file system using the FTP ''CWD'' or ''XCWD'' commands to change to "local://<path>//" where //<path>// is the local file system directory to mount. An alternative method of mounting the local file system is to use the ''SMNT //<local-dir>//'' command. To re-mount (switch back to) the BBS file system, the ''SMNT bbs:'' command can be used or ''CWD''/''XCWD'' command with a path beginning with ''bbs:''. 
 + 
 + 
 +===== Configure ===== 
 + 
 +The Synchronet FTP server can be configured via [[util:SCFG]]:Servers->FTP Server: 
 + 
 +<file> 
 +╔══════════════════════════════════════════════╗ 
 +║                  FTP Server                  ║ 
 +╠══════════════════════════════════════════════╣ 
 +║ │Enabled                       Yes           ║ 
 +║ │Log Level                     Informational ║ 
 +║ │Network Interfaces            0.0.0.0, ::   ║ 
 +║ │Control Port                  21, Data: 20  ║ 
 +║ │Passive Interface (IPv4)      0.0.0.0       ║ 
 +║ │Passive Port Range            1024 - 65535  ║ 
 +║ │Auto-generate Index File      00index       ║ 
 +║ │QWK Message Packet Transfers  Yes           ║ 
 +║ │QWK Message Packet Timeout    10 minutes    ║ 
 +║ │Max Clients                   100           ║ 
 +║ │Max Inactivity                5 minutes     ║ 
 +║ │Max Concurrent Connections    Unlimited     ║ 
 +║ │Sysop File System Access      Yes           ║ 
 +║ │Allow Bounce Transfers        No            ║ 
 +║ │Lookup Client Hostname        Yes           ║ 
 +║ │Failed Login Attempts...                    ║ 
 +╚══════════════════════════════════════════════╝ 
 +</file> 
 + 
 +... via [[monitor:SBBSCTRL]]:FTP->Configure: 
 + 
 +{{:server:sbbsctrl.320.ftp.config.png?|}} 
 + 
 +... or via manual editing of the ''[FTP]'' section of the ''[[dir:ctrl]]/[[config:sbbs.ini]]'' file. 
 + 
 +==== sbbs.ini ==== 
 + 
 +The ''[ftp]'' section of the ''[[dir:ctrl]]/[[config:sbbs.ini]]'' file supports the following configuration settings (''key = value'' lines): 
 + 
 +^ Key               ^ Default Value ^ Description ^ 
 +| AutoStart         | true          | Automatically start up the server (manual is only supported in [[monitor:sbbsctrl]]) | 
 +| Interface         | [global]      | Comma-separated list of IPv4 and IPv6 network interfaces to listen on for incoming TCP connections | 
 +| Port              | 21            | Control TCP Port | 
 +| MaxClients        | 10            | Maximum number of simultaneous incoming TCP sessions supported | 
 +| MaxConcurrentConnections | 0      | Maximum number of concurrent connections from the same IP address (0 = unlimited) | 
 +| MaxInactivity     | 300           | Maximum amount of TCP session inactivity before timeout and disconnection (in seconds) | 
 +| QwkTimeout        | 600           | Maximum amount of time to wait for QWK packet creation (in seconds) | 
 +| SemFileCheckFrequency | [global]  | Frequency (in seconds) of checks for semaphore files | 
 +| MinFileSize           | 0         | Minimum uploaded file size, in bytes (0 = no-minimum) | 
 +| MaxFileSize           | 0         | Maximum uploaded file size, in bytes (0 = no-maximum) | 
 +| PasvIpAddress         | 0         | IPv4 address to advertise for PASV client data connections (0 = auto) | 
 +| PasvPortLow           | 1024      | Lowest TCP port number to use for PASV data connections | 
 +| PasvPortHigh          | 65535     | Highest TCP port number to use for PASV data connections | 
 +| HostName              | [global]  | DNS Hostname of server | 
 +| IndexFileName         | 00index   | Filename to use for auto-generated downloadable file listings | 
 +| AnswerSound           |           | WAV file to play (on Windows) when answering incoming connections | 
 +| HangupSound           |           | WAV file to play (on Windows) when clients disconnect | 
 +| HackAttemptSound      |           | WAV file to play (on Windows) upon detected suspected hack attempt | 
 +| TempDirectory         | [global]  | Directory to use for temporary file storage | 
 +| LogLevel              | [global]   | Minimum severity of log messages to be displayed / stored | 
 +| BindRetryCount        | [global]  | Maximum number of TCP port bind attempts before failure | 
 +| BindRetryDelay        | [global]  | Delay (in seconds) between TCP port bind retries | 
 +| LoginAttempt*         | [global]  | Failed login attempt throttling / filtering / banning | 
 +| Options               | ''ALLOW_INDX_FILE | ALLOW_QWK'' | FTP server option flags (see below for details) | 
 + 
 +=== Options === 
 + 
 +The ''Options'' key of the ''[ftp]'' section of the ''[[dir:ctrl]]/[[config:sbbs.ini]]'' file supports the following option flags (separated by a ''|'' character): 
 + 
 +^ Option              ^ Description ^ 
 +| DEBUG_RX            | Log all received commands (Debug log level) |  
 +| DEBUG_TX            | Log all transmissions (Debug log level) |  
 +| DEBUG_DATA          | Log all DATA channel activity | 
 +| INDEX_FILE          | Auto-generate index (listing) files for optional download | 
 +| ALLOW_QWK           | Allow download/upload of QWK/REP packets | 
 +| ALLOW_BOUNCE        | Allow authenticated non-guest/anonymous users to use FTP Bounce (FXP) functionality - not recommended | 
 +| NO_LOCAL_FSYS       | Disable local file system access (for sysops) | 
 +| KEEP_TEMP_FILES     | Don't delete temporary files, for debug purposes | 
 +| LOOKUP_PASV_IP      | Resolve public IP address for PASV response | 
 +| NO_FTPS             | Disable AUTH TLS support - not recommended | 
 +| NO_HOST_LOOKUP      | Do not resolve/log hostnames of incoming TCP connections | 
 +| NO_RECYCLE          | Do not allow this server to be automatically recycled by external event | 
 +| MUTE                | Disable all sound (WAV) files from playing | 
 + 
 +===== Aliases ===== 
 +You can create a list of file aliases that will appear in your FTP root  
 +directory for: 
 +  * Quick and easy access to often downloaded user files 
 +  * Static filenames that corresponds to a dynamically changing filenames 
 +  * Download access to files on the local disk not in the BBS file database  
 + 
 +Edit the file ''[[dir:ctrl]]/[[config:ftpalias.cfg]]'' with a text editor ([[monitor:SBBSCTRL]]->FTP->Edit->Filename Aliases). 
 + 
 +The ''ftpalias.cfg'' file format is one file or directory alias per line, in the form: 
 +  <alias>  <path>  [description] 
 +   
 +The //<alias>// field is not case-sensitive and may **not** contain spaces. This is the filename that will appear in listing of your FTP root directory. 
 + 
 +The //<path>// field is either the full path and filename to a file on a 
 +local file system (e.g. ''C:\DOCS\MYFILE.TXT'' or ''/docs/myfile.txt'') or a virtual path to a file in the 
 +BBS file database. Virtual paths are specified as 
 +  bbs://lib/dir/filename 
 +   
 +where lib is the library short name, dir is the directory internal code and 
 +filename is the actual filename of the referenced file (may be the long 
 +filename, but may not contain spaces).  
 + 
 +The //[description]// field is the optional description of the file that will be used in  
 +the dynamically generated Auto Index file (if you have this option enabled). 
 +Descriptions of "hidden" indicate files or directories that are not be included in listings. 
 + 
 +Blank lines are ignored. 
 + 
 +Lines beginning with a semicolon ('';'') character are considered comments and are ignored. 
 + 
 +Example Alias: 
 +  sbbs_for_dos.zip   bbs://main/sbbs/sbbs230b.zip   Current version for SBBS for DOS 
 + 
 +===== Display Files =====  
 + 
 +The Synchronet FTP server can optionally send text files from your ''[[dir:text]]'' directory to the FTP client/user under certain conditions: 
 + 
 +^ Filename            ^ Description ^ 
 +| ''ftplogin.txt''    | Sent before the username and password is requested | 
 +| ''ftphello.txt''    | Sent upon successful login | 
 +| ''ftpbadlogin.txt'' | Sent upon unsuccessful login attempt | 
 +| ''ftpbye.txt''      | Sent upon logoff (before server acknowledgment of the ''QUIT'' command) | 
 + 
 +===== Supported Commands ===== 
 +FIXME 
 + 
 + 
 +===== See Also ===== 
 +  * [[:faq:files|Files FAQ]] 
 +  * [[:faq:tcpip|TCP/IP FAQ]] 
 +  * [[:module:makeguest]] 
 +  * [[:server:|Servers]] 
 + 
 +{{indexmenu_n>3}} 

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