Feature Comparison

This page provides quick comparison of C-Kermit for Windows with other open-source terminal emulators for Windows. Most of this information has been taken from the following locations:

• https://en.wikipedia.org/wiki/Comparison_of_SSH_clients
• https://ttssh2.osdn.jp/manual/4/en/
• https://www.chiark.greenend.org.uk/~sgtatham/putty/

Additions/corrections/suggestions highly welcome!

Connection Protocols

Virtual Terminal connections over the following protocols/connection types:

Feature	C-Kermit for Windows	TeraTerm	PuTTY
Serial	✅	✅	✅
RFC2217 Serial over Telnet	✅	❌	❌
SSH v1	❌	✅	✅
SSH v2	✅ (XP SP3+)	✅	✅
Telnet	✅	✅	✅
Telnet-SSL	✅ (XP SP3+)	❔	❔
RLogin	✅	❌	✅
Named Pipe	✅	✅	✅
PTY	✅ (Windows 10 v1809+)	❌	❌
Cygwin	❌	✅	❌
CTERM	✅ (Requires Pathworks32)	❌	❌
LAT	✅ (Requires Pathworks32)	❌	❌
Modem	✅ TAPI, RFC2217, built-in	❌	❌
DLL	✅ ^	❔	❔

^ CKW can make connections via a user-supplied/written DLL allowing support for other protocols not built-in.

IP Connections Types

IP connections (SSH, Telnet, etc) can be made via the following methods:

Feature	C-Kermit for Windows	TeraTerm	PuTTY
IPv4	✅	✅	✅
IPv6	❌ #224	✅	✅
SOCKS 4/5 Proxy	❌ #78	✅	✅
HTTP Proxy	❌ #78	✅	✅

Note that CKW does support HTTP and SOCKS proxy connections for telnet and RLogin, proxies are only unsupported for SSH.

Forwarding

Feature	C-Kermit for Windows	TeraTerm	PuTTY
X11 over SSH	❌ #73	✅	✅
X11 over Telnet	✅	❌	❌
Port forwarding over SSH	❌ #74	✅	✅

File Transfer

Protocol	C-Kermit for Windows	TeraTerm	PuTTY
Kermit	✅ Complete implementation including server support	✅	❌
IKS Server	✅	❌	❌
X-MODEM	✅	✅	❌
Y-MODEM	✅	✅	❌
Z-MODEM	✅	✅	❌
B-PLUS	❌	✅	❌
Quick-VAN	❌	✅	❌
FTP	✅	❌	❌
FTPS	✅ (XP SP3+)	❌	❌
HTTP	✅	❌	❌
HTTPS	✅ (XP SP3+)	❌	❌
SFTP	❌ #219	✅	✅
SCP	❌	✅	✅
None ^	✅	✅	❌

^ Transmit a file as though it were typed in to the keyboard. Both TeraTerm (File -> Send file) and C-Kermit (the transmit command, configured via the set transmit commands) support doing this, optionally with a delay between each line or character.

Other Features

Feature	C-Kermit for Windows	TeraTerm	PuTTY
Scripting	✅ C-Kermit	✅ "Tera Term Language"	❌
Keyboard Mapping	✅	✅	❌
Session Tabs	❌	✅	❌
Find Text in Buffer	✅	❌	❌
Mouse Input	✅	✅	✅
256 colors	❌ #194	✅	✅
Bracketed Paste	❌ #171	❔	✅
Alternate Screen Buffer	❌ #231	✅	✅
Unicode	✅	✅	✅
Log Replaying	✅ ^	✅ ^	❌
Duplicate Session	❌	✅	✅
Minimum Windows Version	NT 3.50, 95	NT 4.0, 95	❔
Complete control over keyboard mapping	✅	❌	❌
Optional menubar, toolbar and statusbar	✅	✅	❌
Remote access via network or dial-in	✅ †	❌	❌
stdin/stdout for automation/scripting	✅	❌	✅ (plink.exe)

^ Based on the TeraTerm documentation it sounds like the "log replay" function effectively just writes the log file out to the terminal emulator which will interpret any escape sequences it contains. The following commands in C-Kermit should achieve the same effect:

SET TERMINAL TYPE VT320   ; Or any other supported terminal type
SET INPUT PACING 50       ; How many miliseconds to pause between each character
SET NETWORK TYPE FILE     ; Connect to a file
SET HOST SESSION.LOG      ; set the filename
CONNECT                   ; connect

If you find yourself doing this often, you could define a macro allowing you to do the job with a single command - log_replay session.log:

def log_reply {
  SET TERMINAL TYPE VT320   ; Or any other supported terminal type
  SET INPUT PACING 50       ; How many miliseconds to pause between each character
  SET NETWORK TYPE FILE     ; Connect to a file
  SET HOST \%1              ; set the filename
  CONNECT                   ; connect
}

† C-Kermit can listen for incoming network or modem connections for remote access. Hostmode, a BBS-like kermit script, is an example of this.

Terminal Emulation

C-Kermit for Windows

C-Kermit for Windows provides a fairly complete implementation of DECs VT52, VT100, VT102, VT220 and VT320 with colour and mouse extensions, double width and double-height characters, dim characters, italics and underlining. Multiple pages, soft-characters, sixels and ReGIS are not supported at this time.

In addition to the industry standard VT series of terminals, C-Kermit for Windows emulates a wide selection of other terminals including ANSI-BBS; Avatar/0+; AT386; BeBox ANSI; Data General DASHER D200, D210; Data General DASHER D217 in native and Unix modes; Hazeltine 1500; Heath/Zenith 19; Hewlett Packard 2621A; HPTERM; IBM HFT and AIXTERM; IBM 3151; Linux console; Microsoft VTNT; QNX ANSI and QNX Console; SCOANSI; Siemens Nixdorf BA80 and 97801-5xx; Sun Console; Televideo TVI910+, TVI925, TVI950; Volker Craig VC404; Wyse 30, 50, 60, 160, and 370

For more details on the emulation profiles, see this page: https://www.kermitproject.org/k95manual/termtype.html

TeraTerm

"VT100 emulation and selected VT200/300 emulation", Tektronix 4010

Supported Control Sequences: https://ttssh2.osdn.jp/manual/4/en/about/ctrlseq.html

PuTTY

"an xterm terminal emulator"