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https://issues.apache.org/jira/browse/GUACAMOLE-2301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18096895#comment-18096895
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Ciro Iriarte commented on GUACAMOLE-2301:
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I'll run some tests and report back. I'm a little bit worried about
scalability. 1000 connections defined and launching on demand is different to
1000 streams "just in case someone wants to use the serial console".
What's your take on that?
> Add serial console protocol support
> -----------------------------------
>
> Key: GUACAMOLE-2301
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-2301
> Project: Guacamole
> Issue Type: New Feature
> Components: guacamole-client, guacamole-manual, guacd
> Reporter: Ciro Iriarte
> Priority: Major
>
> Guacamole offers terminal protocols (SSH, Telnet) and, recently, IPMI
> Serial-over-LAN (GUACAMOLE-2300), but has no way to reach a plain *serial
> console* — the RS-232 console port of network switches, routers, firewalls,
> PDUs, and headless servers — which remains the primary out-of-band
> administration and disaster-recovery interface for that equipment.
> This proposes a new "serial" protocol module for guacd, with a matching
> connection form in guacamole-client and a chapter in guacamole-manual,
> mirroring the existing terminal protocols and reusing the shared terminal
> emulator (color schemes, fonts, scrollback, session recording, typescript,
> copy/paste).
> h3. Scope
> Two connection modes, selected by an explicit parameter:
> * *Local* — a serial device attached to the guacd host (e.g. /dev/ttyUSB0,
> /dev/serial/by-id/...), configured via termios: baud rate, data bits, parity,
> stop bits, and hardware/software flow control, with an optional server-side
> device allowlist.
> * *Network* — a serial port exposed over IP by ser2net
> (https://github.com/cminyard/ser2net), either as raw TCP or via RFC2217
> (Telnet COM-PORT-OPTION), the latter enabling negotiation of serial line
> settings and break signalling over the wire.
> h3. Notable features
> * Configurable *send-break* (break-duration) for password-recovery / ROMMON /
> U-Boot workflows, triggerable from the browser and via a client-agnostic
> control pipe.
> * *Paste pacing* (paste-delay) to avoid FIFO overrun when pasting
> configuration blocks at low baud without flow control.
> * Session recording / typescript for audit, read-only mode, and clipboard
> controls, inherited from the shared terminal.
> h3. Implementation status
> A working implementation exists across guacamole-server, guacamole-client,
> and guacamole-manual, building cleanly against apache/main; coordinated PRs
> to follow. USB/IP was evaluated and deliberately not integrated, as ser2net
> is the appropriate mechanism for remote serial access.
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