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ZOC Terminal Emulator and SSH Client – Features

ZOC Terminal is a professional terminal emulation software for Windows and macOS.
ZOC Terminal Emulation Screenshots
Screenshots: [Windows] [macOS]

Introduction to ZOC Terminal

ZOC is a professional, modern and well-established terminal emulator and telnet client and it is known for its configurability and outstanding user interface.

The purpose of the program is to allow you to access character-based hosts using Secure Shell (SSH), telnet (rfc854), RS232/serial and many other communication methods. It can be used to connect to Unix/Linux hosts and shell accounts, IBM mainframes (via TN3270 or TN5250), devices connected to your computer's serial port or BBS's, internet muds.

ZOC features tabbed sessions and extensive functions like a typed command history, scrollback, multiple window support and others. This makes it the ideal tool for people who repeatedly need to access text based shell accounts from a Windows or macOS platform. With ZOC's support for the xterm emulation, complete with 256 color support, mouse support, meta-keys and local printing, Linux admins will feel like they are sitting at their native consoles. Also, if you are working with the Cisco CLI, this is your tool of choice.

ZOC also supports Xterm, vt220 and several types of ansi as well as Wyse, TVI (Televideo), 3270, and Sun's CDE. ZOC also utilises all main file transfer protocols, including SCP, FTP, SFTP, FTPS, as well as X-, Y- and Zmodem, Kermit and many others. All of which are offered in a flexible and intuitive interface that leaves absolutely nothing to be desired.

With all the above features, ZOC also makes a good replacement for ProComm or for software like Attachmate, Netterm/SecureNetTerm etc.

ZOC is also highly configurable. As well as the standard terminal features such as keyboard redefinition and scroll back buffer it also offers some more advanced and unique features including a powerful scripting language, and automatic triggering of actions based on received or typed text or a line trace feature.

ZOC Terminal Emulator Documentation

If you would like to find out more about ZOC's capabilities before downloading the program, you can browse the online version of the ZOC Helpfiles or you can downloads ZOC's help text and documentation in PDF format here: zocenglish.pdf.

In addition to that, we have a collection of documents, e.g. about installation and scripting: other documents.

Features of ZOC Terminal

User Interface

  • Tabbed sessions with overview screen to show thumbnails of all open sessions
  • Session tabs can be moved between windows
  • "Colorful tabs" feature to tint user interface elements with different colors depending on which host is connected
  • Full keyboard remapping (e.g. to send text, perform functions, execute programs, etc.)
  • Host directory with folders and full option set for each entry and automatic login sequences
  • User button bar to map texts, scripts, phone book entries, external protocols and shell commands to buttons (incl. sub-folders in the button bar)
  • F-Macro keys for texts, scripts, phone book entries, external shell commands, etc.
  • Local typing (entry field with history e.g. to locally type commands and/or send them to all sessions)
  • Various logging and scroll back functions
  • Compatible with current Windows 10/11 and macOS Solanana operating systems (more details below)


  • VT52, VT220, full report).
  • Xterm emulation with 256 colors and mouse support (e.g. for use with Midnight Commander)
  • Linux console-like (including UTF8, colors, full keyboard)
  • TN3270 (models 3278 and 3279/E with line graphics, colors and full keyboard mapping)
  • TN5250 for IBM iSeries access
  • ANSI-BBS, ANSI-SCO, Avatar
  • Sun-CDE
  • QNX V4
  • Tandem 6530
  • HP 2645
  • ATT4410
  • TTY
  • All emulations support line graphics with any font


  • Modern Secure Shell (currently based on OpenSSH 8.6) with public/private key authentication, smart-card support (pkcs#11 and CAC/PIV) and port forwarding (tunneling)
  • Integrated FTP/FTPS/SFTP client
  • Telnet (RFC-Telnet, pure TCP sockets), SSL-Telnet (with TLS 1.2 and TLS 1.3 support)
  • IPv6 support for SSH v2 and Telnet
  • Modem via serial port and TAPI (Windows modem)
  • Direct serial console connections via local serial port or USB/serial adaptors with FTDI chipset or Keyspan or PL2303
  • Supports Break-Signal for serial Connections (e.g. for CISCO devices)
  • Rlogin
  • ISDN via CAPI V2.0 (including X.25 and X.31 support)
  • File transfer via Ascii, Xmodem, Ymodem, Zmodem, Kermit, SCP, IND$FILE
  • Translation of inbound/outbound characters

SSH (Secure Shell) Features

  • Based on industry reference implementation OpenSSH
  • Client supports latest encryptions like ED25519 SHA256, SHA2 or AES-256ctr
  • SSH public/private key, key certificate, keyboard interactive or password authentication
  • Dynamic port forwarding (client as a SOCKS proxy)
  • X11 forwarding (lets you run X-Windows applications from the remote session)
  • Static port forwarding (tunneling of connections to remote destinations)
  • Proxy support (client connects to server through proxy or jumpserver/jumpdrive)
  • SSH Agent forwarding between client and server
  • offers a separate zoc-agent program for Windows
  • support for Putty-Agent (Windows) and ssh-agent (macOS)
  • Client side SSH key generator
  • SCP file transfer through terminal emulation session
  • SSH client protocol versions 1 and 2
  • SSH Keep-Alive


  • Scroll back in three variantes (in window, in separate Window and data view in separate window)
  • Auto Highlight (text on screen can be monitored and special phrases can be highlighted automatically)
  • Raw data trace to file (text and binary mode)
  • Hex debug mode on screen
  • File-log of all incoming data including optional time stamps
  • Printer log of all incoming data
  • Auto-Highlight (automatic color highlighting of predefined words or phrases)
  • Print screen and screen to clipboard functions


  • AutoLogin (recorded login procedures from the host directory)
  • REXX language for scripting (fully featured programming language with over 75 extensions to control the terminal emulator)
  • DDE support allows ZOC to act as a communication server (Windows)
  • AppleScript support with access to all internal script commands (macOS)
  • Auto Macros (text/functions invoked by typing certain text)
  • Auto Replies (text/functions invoked by receiving certain text)
  • Functions and special escape sequences to automatically exeute local applications (NetTerm compatible)

Operating Systems and Administration

  • Version 8.xx available for Windows 11/10/8/7/Vista/2019/2016/2012/2008 (x86/x64) and macOS 10.9 Mavericks or higher (Intel and native ARM/Apple Silicon).
  • Low use of resources (ca 12 MB disk space, runs well on anything upward from a Pentium® DualCore with 512 MB memory)
  • Older versions (V7.xx, V6.xx) are still available for PPC and macOS versions before Mavericks, as well as older Windows versions like XP, 2003 and even 95
  • Version 4.xx also available for OS/2
  • LAN installation (LAN licensing and shared installations)
  • Administrator friendly (can be preconfigured and/or functionally restricted)
  • Complete online documentation
  • Uninstall program


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