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

You can donate to the Synchronet project using PayPal.

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision
Previous revision
server:terminal [2018/03/01 12:11] – Links to util:binkit changed to module:binkit digital manserver:terminal [2024/03/04 20:42] (current) – [Configure] Updated SCFG screenshot for SSH digital man
Line 1: Line 1:
 ====== Terminal Server ====== ====== Terminal Server ======
-The Synchronet Terminal Server is responsible for providing that "old school" BBS user interface over dial-up modems and classic Internet console protocols (e.g. Telnet).+The Synchronet //Terminal Server// is responsible for providing that "old school" BBS user interface over dial-up modems and classic Internet console protocols (e.g. Telnet).
  
 ===== Features ===== ===== Features =====
  
-  * Supports ANSI X3.64 (color and monochrome), [[wp>Remote_imaging_protocol|RIP]], and dumb terminals +  * Supports ANSI X3.64 (color and monochrome), PETSCII, [[wp>Remote_imaging_protocol|RIP]], and dumb terminals 
-  * Supports [[wp>ASCII|US-ASCII]] and [[wp>Code_page_437|CP437]] (a.k.a. IBM Extended ASCII) character sets  +  * Supports [[wp>ASCII|US-ASCII]][[wp>Code_page_437|CP437]] (a.k.a. IBM Extended ASCII), UTF-8 (UNICODE), and CBM/[[wp>PETSCII]] character sets  
-  * Supported Protocols: [[#Telnet]], [[#RLogin]], and [[#SSH]]+  * Supported Protocols: [[#Telnet]], [[#RLogin]], [[#SSH]], and raw TCP 
 + 
 +===== Configure ===== 
 + 
 +The Synchronet Terminal Server can be configured via [[util:SCFG]]:Servers->Terminal Server: 
 + 
 +<file> 
 +╔═══════════════════════════════════════════╗ 
 +║              Terminal Server              ║ 
 +╠═══════════════════════════════════════════╣ 
 +║ │Enabled                       Yes        ║ 
 +║ │Log Level                     Info       ║ 
 +║ │Serving Nodes                 1-4        ║ 
 +║ │SSH Support...                Port 22    ║ 
 +║ │Telnet Support...             Port 23    ║ 
 +║ │RLogin Support...             Port 513   ║ 
 +║ │40 Column PETSCII Support     Port 64    ║ 
 +║ │80 Column PETSCII Support     Port 128   ║ 
 +║ │DOS Program Support           Yes        ║ 
 +║ │Max Concurrent Connections    Unlimited  ║ 
 +║ │Max Login Inactivity          10 minutes ║ 
 +║ │Max New User Inactivity       1 hour     ║ 
 +║ │Max User Inactivity           10 minutes ║ 
 +║ │Output Buffer Drain Timeout   10 ms      ║ 
 +║ │Execute Timed Events          Yes        ║ 
 +║ │Execute QWK-related Events    Yes        ║ 
 +║ │Lookup Client Hostname        Yes        ║ 
 +║ │JavaScript Settings...                   ║ 
 +║ │Failed Login Attempts...                 ║ 
 +╚═══════════════════════════════════════════╝ 
 +</file> 
 + 
 +... or configured (on Windows) via [[monitor:SBBSCTRL]]:Telnet->Configure dialog 
 + 
 +{{:server:sbbsctrl.3.20.term.config.png}} 
 + 
 +... or configured by manually editing the ''[BBS]'' section of the ''[[dir:ctrl]]/[[config:sbbs.ini]]'' file 
 + 
 +===== Key Bindings ===== 
 + 
 +==== Global Ctrl-Keys ==== 
 + 
 +These control-key combinations have special purpose at almost any-time while using the Terminal Server: 
 + 
 +^ Ctrl-Key ^ Description ^ 
 +| Ctrl-K   | Display a Ctrl-key Menu | 
 +| Ctrl-C   | Stop the current process / listing / operation | 
 +| Ctrl-O   | Toggle auto-pause prompt temporarily | 
 +| Ctrl-Z   | Toggle raw input/output mode | 
 +| Ctrl-U   | List users online | 
 +| Ctrl-P   | Page for chat or send instant-message or telegram to users | 
 +| Ctrl-T   | Display current time information | 
 + 
 +Global control-keys are handled in sbbs_t::handle_ctrlkey(), called from sbbs_t::inkey() in ''inkey.cpp'' and exposed in JavaScript via console.inkey(). 
 + 
 +Global control key handling may be disabled/re-enabled (per key) programmatically via the JavaScript console.ctrlkey_passthru property: 
 + js.on_exit("console.ctrlkey_passthru = " + console.ctrlkey_passthru); 
 + console.ctrlkey_passthru|=(1<<16);      // Disable Ctrl-P handling in sbbs 
 + 
 +Custom global control-key handlers may be installed via [[util:SCFG]]->External Programs->Global Hot Key Events: 
 + 
 +<file> 
 +╔═══════════════════════════════════════════╗ 
 +║           Global Hot Key Events           ║ 
 +╠═══════════════════════════════════════════╣ 
 +║ │Ctrl-P    ?privatemsg.js                 ║ 
 +║ │Ctrl-U    ?nodelist.js -active           ║ 
 +║ │                                         ║ 
 +╚═══════════════════════════════════════════╝ 
 +</file> 
 +==== Line Input ==== 
 + 
 +Additional control-key combinations have special behavior during line (text string) input: 
 + 
 +^ Ctrl-Key ^ Description ^ 
 +| Ctrl-N   | Move to next word in line | 
 +| Ctrl-\   | Move to previous word in line | 
 +| Ctrl-D   | Delete word to the right | 
 +| Ctrl-W   | Delete word to the left | 
 +| Ctrl-Y   | Delete from the cursor to the end of the line | 
 +| Ctrl-X   | Delete the entire current line | 
 +| Ctrl-L   | Center the line and complete input | 
 +| Ctrl-Z   | Undo (revert edited line) | 
 +| Ctrl-R   | Redraw current line | 
 +| Ctrl-A   | Insert an [[custom:ctrl-a_codes|attribute code]] (when allowed) | 
 +| Ctrl-G   | Insert a beep character (when allowed) | 
 + 
 +The line/string input control-keys are handled via sbbs_t::getstr() in ''getstr.cpp'' and exposed in JavaScript via console.getstr(). 
 + 
 +==== Extended Keys ==== 
 + 
 +The Synchronet Terminal Server endeavors to support most extended-keys (e.g. home, end, arrow-keys, etc.) on most terminals while simultaneously supporting control-key equivalents for all terminals. 
 + 
 +^ Extended Key ^ Decimal ^ Hex ^ Ctrl-Key ^ ANSI((ANSI X3.64/ECMA-048 escape sequence)) ^ Other((e.g. VT-220 or XTerm escape sequence)) ^ Description (typical use) ^  
 +| Home         | 2       | 02  | Ctrl-B   | \e[H                    | \e[1~  | Move cursor to beginning of line or top of page/list/document | 
 +| End          | 5       | 05  | Ctrl-E   | \e[K and \e[F           | \e[4~  | Move cursor to end of line or bottom of page/list/document | 
 +| Up-arrow     | 30      | 1E  | Ctrl-Caret   | \e[A                    |        | Move cursor up one line or recall previous history item | 
 +| Down-arrow   | 10      | 0A  | Ctrl-J   | \e[B                    |        | Move cursor down one line or recall next history item | 
 +| Left-arrow   | 29      | 1D  | Ctrl-]   | \e[D                    |        | Move cursor to the left | 
 +| Right-arrow  | 6       | 06  | Ctrl-F   | \e[C                    |        | Move cursor to the right | 
 +| Page-up      | 16      | 10  | Ctrl-P   | \e[V                    | \e[5~  | Move cursor up one page | 
 +| Page-down    | 14      | 0E  | Ctrl-N   | \e[U                    | \e[6~  | Move cursor up one page | 
 +| Insert       | 22      | 16  | Ctrl-V   | \e[@                    | \e[2~  | Toggle insert/overwrite text mode | 
 +| Delete       | 127     | 7F  | Ctrl-?                           | \e[3~  | Delete character under cursor (delete-right), also Ctrl-Backspace |
  
-===== Configuration ===== 
  
-  * Configured via the ''[[dir:ctrl]]/[[config:sbbs.ini]]'' file 
-  * Optionally configured (on Windows) via [[monitor:SBBSCTRL]]:Telnet->Configure dialog 
-  * Configured behavior may be over-ridden via ''[[monitor:sbbscon|sbbs]]'' command-line arguments 
 ===== Telnet ===== ===== Telnet =====
  
Line 18: Line 117:
  
 The Synchronet Terminal Server will negotiate Telnet options with the client (enforcing echo and non-line-at-a-time modes), perform ''IAC'' (character 255) escaping, and CR/LF->CR and CR/NUL->CR translation (when not in //binary mode//). The Synchronet Terminal Server will negotiate Telnet options with the client (enforcing echo and non-line-at-a-time modes), perform ''IAC'' (character 255) escaping, and CR/LF->CR and CR/NUL->CR translation (when not in //binary mode//).
 +
 +==== Configure ====
 +Telnet support in the Synchronet Terminal Server can be configured via [[util:SCFG]]:Servers->Terminal Server->Telnet Support:
 +
 +<file>
 +╔══════════════════════════════════╗
 +║          Telnet Support          ║
 +╠══════════════════════════════════╣
 +║ │Enabled             Yes         ║
 +║ │Interfaces          0.0.0.0, :: ║
 +║ │Port                23          ║
 +║ │Command Debug       No          ║
 +║ │Send Go-Aheads      Yes         ║
 +╚══════════════════════════════════╝
 +</file>
 +
 +==== Options ====
 +
 +Telnet options are negotiated between the client and server, normally without any indication to the user.
 +
 +If no Telnet options are received by the Terminal Server during an initial client session on the configured Telnet port, the Terminal Server will revert the client to just "Raw TCP" protocol.
 +
 +Telnet options can be re-negotiated at any time during a Telnet session, but most options are only negotiated during the initial connection.
 +
 +^ Options       ^ Request ^ Description ^
 +| ECHO          | WILL    | Server will provide the echo of input keys, so request the the terminal does not echo (RFC-[[rfc>857]])|
 +| SUP_GA        | WILL    | Server does not send or expect to receive any Telnet Go-Ahead (GA) commands (RFC-[[rfc>858]]) |
 +| TERM_TYPE     | DO      | Server would like the client to provide the terminal-type, if available (RFC-[[rfc>930]]) |
 +| TERM_SPEED    | DO      | Server would like the client to provide the terminal-speed, if available (RFC-[[rfc>1079]]) |
 +| SEND_LOCATION | DO      | Server would like the client to provide the user's location, if available (RFC-[[rfc>779]]) |
 +| NEGOTIATE_WINDOW_SIZE | DO | Server would like the client to provide the terminal dimensions (cols x rows), if available (RFC-[[rfc>1073]]) |
 +| NEW_ENVIRON   | DO      | Server would like the client to provide environment variables (RFC-[[rfc>1572]]) - unused |
 +
 +The BINARY_TX option (disabling special treatment of CR/LF and CR/NUL) is dynamically negotiated as needed, for file transfers.
 +
 +=== Debugging ===
 +
 +The Terminal server logs all Telnet option negotiations using a //Debugging// log-level:
 +
 +<file>
 +  6/20  05:56:41p  Node 1 sending telnet cmd: WILL Echo
 +  6/20  05:56:41p  Node 1 sending telnet cmd: WILL Suppress Go Ahead
 +  6/20  05:56:41p  Node 1 sending telnet cmd: DO Terminal Type
 +  6/20  05:56:41p  Node 1 sending telnet cmd: DO Terminal Speed
 +  6/20  05:56:41p  Node 1 sending telnet cmd: DO Send Location
 +  6/20  05:56:41p  Node 1 sending telnet cmd: DO Negotiate About Window Size
 +  6/20  05:56:41p  Node 1 sending telnet cmd: DO New Environment Option
 +  6/20  05:56:41p  Node 1 received telnet cmd: DO Echo
 +  6/20  05:56:41p  Node 1 received telnet cmd: DO Suppress Go Ahead
 +  6/20  05:56:41p  Node 1 received telnet cmd: WILL Terminal Type
 +  6/20  05:56:41p  Node 1 requesting telnet terminal type
 +  6/20  05:56:41p  Node 1 received telnet cmd: WON'T Terminal Speed
 +  6/20  05:56:41p  Node 1 sending telnet cmd: DON'T Terminal Speed
 +  6/20  05:56:41p  Node 1 received telnet cmd: WON'T Send Location
 +  6/20  05:56:41p  Node 1 sending telnet cmd: DON'T Send Location
 +  6/20  05:56:41p  Node 1 received telnet cmd: WILL Negotiate About Window Size
 +  6/20  05:56:41p  Node 1 received telnet sub-negotiation command: Negotiate About Window Size
 +  6/20  05:56:41p  Node 1 received telnet window size: 80x24
 +  6/20  05:56:41p  Node 1 received telnet cmd: WON'T New Environment Option
 +  6/20  05:56:41p  Node 1 received telnet sub-negotiation command: Terminal Type
 +  6/20  05:56:41p  Node 1 received telnet terminal type: ANSI
 +</file>
 +
 +
 +===== SSH =====
 +[[wp>Secure Shell]] version 2 clients are supported, by default, on the standard SSH TCP port: 22.
 +
 +SSHv2 support provided by [[dev:dependencies#cryptlib]].
 +
 +==== Configure ====
 +
 +SSH support in the Synchronet Terminal Server can be configured via [[util:SCFG]]:Servers->Terminal Server->SSH Support:
 +<file>
 +╔══════════════════════════════════════════════════════╗
 +║                      SSH Support                     ║
 +╠══════════════════════════════════════════════════════╣
 +║ │Enabled                       Yes                   ║
 +║ │Interfaces                    0.0.0.0, ::           ║
 +║ │Port                          22                    ║
 +║ │Connect Timeout               10 seconds            ║
 +║ │Error Level                   Warning               ║
 +║ │User Authentication Type      Valid Key or Username ║
 +║ │File Transfer (SFTP) Support  No                    ║
 +║ │Max SFTP Inactivity           N/                  ║
 +╚══════════════════════════════════════════════════════╝
 +</file>
 +
 +==== cryptlib.key ====
 +
 +The SSH private key is stored in the file ''[[dir:ctrl]]/cryptlib.key'' and is encrypted with the configured System Password (from [[util:SCFG]]->System). If the System Password is changed **after** the ''cryptlib.key'' file has been generated (and encrypted), you will need to delete the key file and recycle the terminal server for the key file to be regenerated and re-encrypted with the new System Password.
 +
 +The following Terminal Server log message indicates a problem decrypting the ''cryptlib.key'' file:
 +  'Couldn't import the session key used to protect the private key' (-22) getting private key
 ===== RLogin ===== ===== RLogin =====
-[[ftp://ftp.rfc-editor.org/in-notes/rfc1282.txt|RLogin]] clients are supported, by default, on the standard RLogin TCP port: 513.+BSD Rlogin (RFC-[[rfc>1282]]clients are supported, by default, on the standard RLogin TCP port: 513. 
 + 
 +==== Configure ==== 
 +RLogin support in the Synchronet Terminal Server can be configured via [[util:SCFG]]:Servers->Terminal Server->RLogin Support: 
 + 
 +<file> 
 +╔══════════════════════════════════╗ 
 +║          RLogin Support          ║ 
 +╠══════════════════════════════════╣ 
 +║ │Enabled             Yes         ║ 
 +║ │Interfaces          0.0.0.0, :: ║ 
 +║ │Port                513         ║ 
 +╚══════════════════════════════════╝ 
 +</file> 
 + 
 +==== History  ====
  
-==== History of Synchronet'support for BSD RLogin ====+Synchronet's RLogin support has gone through some significant changes since its introduction in 2000.
  
 === SBBS v3.00c 2000 === === SBBS v3.00c 2000 ===
Line 70: Line 277:
  
   * [[person:digital man]] removed and deprecated the ''USE_2ND_RLOGIN'' option (and related [[monitor:sbbscon|sbbs]] command-line option and [[monitor:sbbsctrl]] checkbox) as this is now the **only** behavior supported by the Synchronet [[server:Terminal]] Server: the first string received from the RLogin client (''client-user-name'') **may** be a password, the second string received (''server-user-name'') **must** be a valid user ID (alias).   * [[person:digital man]] removed and deprecated the ''USE_2ND_RLOGIN'' option (and related [[monitor:sbbscon|sbbs]] command-line option and [[monitor:sbbsctrl]] checkbox) as this is now the **only** behavior supported by the Synchronet [[server:Terminal]] Server: the first string received from the RLogin client (''client-user-name'') **may** be a password, the second string received (''server-user-name'') **must** be a valid user ID (alias).
-  * [[person:digital man]] changed the ''bbs.rlogin_gate'' function to accept 3 optional arguments: ''client-user-name'', ''server-user-name'', and ''terminal'', in the order specified by the RFC 1282. +  * [[person:digital man]] changed the ''bbs.rlogin_gate'' function to accept 3 optional arguments: ''client-user-name'', ''server-user-name'', and ''terminal'', in the order specified by the RFC-[[rfc>1282]].
-===== SSH ===== +
-[[wp>Secure Shell]] version 2 clients are supported, by default, on the standard SSH TCP port: 22. +
- +
-SSHv2 support provided by [[dev:dependencies#cryptlib]].+
  
 ===== JavaScript ===== ===== JavaScript =====
Line 83: Line 286:
   * [[http://synchro.net/docs/jsobjs.html#console|console object]]   * [[http://synchro.net/docs/jsobjs.html#console|console object]]
  
-===== Source Code ===== 
- 
-The Synchronet Terminal Server source code makes up the majority of the C (and all of the C++) files found in ''[[dev:cvs]][[http://cvs.synchro.net/cgi-bin/viewcvs.cgi/src/sbbs3/|/src/sbbs3]]'' with the main module being ''[[http://cvs.synchro.net/cgi-bin/viewcvs.cgi/*checkout*/src/sbbs3/main.cpp|main.cpp]]''. 
  
 ====== See Also ====== ====== See Also ======
-  * [[module:binkit|Synchronet External Plain Old Telephone System Support (SEXPOTS)]]+  * [[:util:sexpots|Synchronet External Plain Old Telephone System Support (SEXPOTS)]]
   * [[:server:index|Servers]]   * [[:server:index|Servers]]
  
 {{indexmenu_n>1}} {{indexmenu_n>1}}