3.1.0 - 2026-10-13

New features

• Implement port-forwarding protocol v2 (MEN-5902) The new protocol is identical to v1 except v2 does not stop and wait for message acknowledgement. This immensely speeds up the throughput especially for higher latency. mender-connect continues to support the previous version of port-forwarding for backward compatibility. Requires mender-server > 4.1 and mender-cli > 2.0.

• Filetransfer protocol v2 (MEN-9628) The new protocol version utilize the new reliable websocket interconnect rendering the end-to-end ack redundant and a bottleneck.

  When filetransfer is enabled, announce to the peer that the device supports the v2 filetransfer protocol. The device also announce the v1 protocol version in case the peer (server) to remain backward compatible with older peers (server).

Bug fixes

• (session) Guard sessionsMap/sessionsByUserIdMap with a mutex
• (session) Close races and nil-derefs left by the sessionsMutex fix

Dependency updates

• (deps) Update github.com/mendersoftware/go-lib-micro from f0e3087 to 79a6e6f

All tickets resolved in this release

Ticket
MEN-5902
MEN-9628
MEN-10236

3.0.1 - 2026-09-17

Bug fixes

• Fix a whole-daemon hang when a pong arrives while a timed-out remote terminal session is being stopped

• Do not ignore terminal ignore terminal port-forwarding error If mender-connect fails to write a message to the connection, treat it as a terminal error instead of ignoring it.

• Handle partial write to port-forwarding connection

Dependency updates

• (deps) Update module github.com/urfave/cli/v2 Bump Go version in go.mod from 1.17 to 1.22 Update Go module github.com/urfave/cli/v2 from v2.25.0 to v3.12.0
• (deps) Update github.com/go-ozzo/ozzo-validation/v4 from v4.3.0 to v4.4.1
• (deps) Update github.com/gorilla/websocket from v1.5.1 to v1.5.3
• (deps) Update github.com/mendersoftware/cli/v2 from v2.1.1-minimal to v2.1.1
• (deps) Update github.com/mendersoftware/go-lib-micro from e1f941f to f0e3087
• (deps) Update github.com/stretchr/testify from v1.11.1 to v1.12.1
• (deps) Update github.com/urfave/cli/v2from v2.25.0 to v2.27.7

mender-connect 3.0.0 (2026-02-27)

3.0.0 - 2026-02-27

Features

• lower backoff intervals

  The previous backoff had a starting interval at 1 minute and a max backoff at 60 minutes. When it reached 60 minutes it would linearly increase to 120 minutes minutes where it would keep retrying.

  The backoff will now start at 1 second and exponentially increase after 3 retries until it reaches 30 minutes where it will keep retrying. For each interval a jitter between 0 and 5 seconds will be added. (ME-546)

• Session expiration is now enabled by default:
  • StopExpired defaults to true
  • ExpireAfterIdle defaults to 10 minutes Note that this is a behavioral change; StopExpired previously defaulted to false and no default value was previously assigned to ExpireAfterIdle. (MEN-8260)

mender-connect 2.3.4

Released 09.07.2026

Changelogs

mender-connect (2.3.4)

New changes in mender-connect since 2.3.3:

Bug Fixes

• Fix a whole-daemon hang when a pong arrives while a timed-out remote terminal session is being stopped

mender-connect 2.3.3

Released 06.17.2026

Changelogs

mender-connect (2.3.3)

New changes in mender-connect since 2.3.2:

Bug Fixes

• Do not ignore terminal port-forwarding error. If mender-connect fails to write a message to the connection, treat it as a terminal error instead of ignoring it.
• Handle partial write to port-forwarding connection.

mender-connect 2.3.2

Released 02.17.2026

Changelogs

mender-connect (2.3.2)

New changes in mender-connect since 2.3.1:

Bug Fixes

• make StopShell function re-entrant by protecting stop channel (MEN-9029)

mender-connect 2.3.1

Released 07.24.2025

Changelogs

mender-connect (2.3.1)

New changes in mender-connect since 2.3.0:

Bug Fixes

• Preserve group assignments by retrieving GIDs for users and adding them when executing a shell. (ME-530)

mender-connect (2.3.0)

New changes in mender-connect since 2.2.1:

Bug fixes

• systemd: Always try restarting the client if it exits.

Features

• added back-off in connectionmanager (MEN-5782)

Other

• --version no longer outputs the text "mender-connect version". (MEN-6965)

mender-connect 2.2.0

Released 12.28.2023

Statistics

Developers with the most changesets
Lluis Campos	9 (50.0%)
Krzysztof Jaskiewicz	3 (16.7%)
Andreas Henriksson	2 (11.1%)
Roberto Giovanardi	1 (5.6%)
Fabio Tranchitella	1 (5.6%)
Kristian Amlie	1 (5.6%)
Peter Grzybowski	1 (5.6%)

Developers with the most changed lines
Krzysztof Jaskiewicz	644 (71.6%)
Lluis Campos	158 (17.6%)
Peter Grzybowski	55 (6.1%)
Kristian Amlie	28 (3.1%)
Andreas Henriksson	9 (1.0%)
Fabio Tranchitella	3 (0.3%)
Roberto Giovanardi	2 (0.2%)

Developers with the most lines removed
Fabio Tranchitella	3 (1.1%)

Developers with the most signoffs (total 2)
Lluis Campos	2 (100.0%)

Top changeset contributors by employer
Northern.tech	16 (88.9%)
andreas@fatal.se	2 (11.1%)

Top lines changed by employer
Northern.tech	890 (99.0%)
andreas@fatal.se	9 (1.0%)

Employers with the most signoffs (total 2)
Northern.tech	2 (100.0%)

Employers with the most hackers (total 7)
Northern.tech	6 (85.7%)
andreas@fatal.se	1 (14.3%)

Changelogs

mender-connect (2.2.0)

New changes in mender-connect since 2.1.1:

Bug fixes

• In Mender client v4.0, the mender binary has been split into mender-update and mender-auth. Modify mender-connect to call the right binary to trigger check-update and send-inventory (MEN-6827)
• mender-connect systemd service can use either the old mender-client service or the new mender-authd service, which is the name of the authentication daemon of new Mender client. They are both kept as Wants and not Require so that mender-connect can run with either. (MEN-6858)

Features

• build and test using the latest version of golang (1.21 today) (QA-614)

mender-connect 2.1.2

Released 06.12.2024

Changelogs

mender-connect (2.1.2)

New changes in mender-connect since 2.1.1:

Bug fixes

• In Mender client v4.0, the mender binary has been split into mender-update and mender-auth. Modify mender-connect to call the right binary to trigger check-update and send-inventory (MEN-6827)
• mender-connect systemd service can use either the old mender-client service or the new mender-authd service, which is the name of the authentication daemon of new Mender client. They are both kept as Wants and not Require so that mender-connect can run with either. (MEN-6858)
• Stop shell after the ping/pong health check fails, so that the mender-connect can recover after disruption of connectivity. For already released versions of mender-connect the workaround is to force the stop of shells for expired sessions adding to the configuration options the fields:

  "Sessions": {
    "StopExpired": true,
    "ExpireAfterIdle": 600
  }

  Setting a limit for expiration high enough (10 minutes, above) so that it doesn't interfere with regular operations. See https://docs.mender.io/add-ons/mender-connect#remote-terminal-configuration (MEN-6888)

mender-connect 2.1.1

Released 10.18.2023

Statistics

Developers with the most changesets
Andreas Henriksson	1 (20.0%)
Lluis Campos	1 (20.0%)
Krzysztof Jaskiewicz	1 (20.0%)
Peter Grzybowski	1 (20.0%)
Kristian Amlie	1 (20.0%)

Developers with the most changed lines
Peter Grzybowski	55 (57.9%)
Kristian Amlie	28 (29.5%)
Krzysztof Jaskiewicz	7 (7.4%)
Andreas Henriksson	3 (3.2%)
Lluis Campos	2 (2.1%)

Developers with the most signoffs (total 1)
Lluis Campos	1 (100.0%)

Top changeset contributors by employer
Northern.tech	4 (80.0%)
andreas@fatal.se	1 (20.0%)

Top lines changed by employer
Northern.tech	92 (96.8%)
andreas@fatal.se	3 (3.2%)

Employers with the most signoffs (total 1)
Northern.tech	1 (100.0%)

Employers with the most hackers (total 5)
Northern.tech	4 (80.0%)
andreas@fatal.se	1 (20.0%)

Changelogs

mender-connect (2.1.1)

New changes in mender-connect since 2.1.0:

Bug fixes

• fix unstable unit test

mender-connect 2.1.0

Released 09.25.2022

Statistics

A total of 130 lines added, 20 removed (delta 110)

Developers with the most changesets
Peter Grzybowski	4 (57.1%)
Uri Ishon	1 (14.3%)
Fabio Tranchitella	1 (14.3%)
Manuel Zedel	1 (14.3%)

Developers with the most changed lines
Peter Grzybowski	115 (88.5%)
Manuel Zedel	8 (6.2%)
Uri Ishon	5 (3.8%)
Fabio Tranchitella	2 (1.5%)

Top changeset contributors by employer
Northern.tech	6 (85.7%)
uishon@gmail.com	1 (14.3%)

Top lines changed by employer
Northern.tech	125 (96.2%)
uishon@gmail.com	5 (3.8%)

Employers with the most hackers (total 4)
Northern.tech	3 (75.0%)
uishon@gmail.com	1 (25.0%)

Changelogs

mender-connect (2.1.0)

New changes in mender-connect since 2.0.2:

Features

• if the /etc/shells file does not exit, fall back to the default shell

mender-connect 2.0.2

Released 06.14.2022

For internal consumption only.

mender-connect 2.0.1

Released 02.02.2022

Statistics

A total of 111 lines added, 16 removed (delta 95)

Developers with the most changesets
Peter Grzybowski	2 (100.0%)

Developers with the most changed lines
Peter Grzybowski	111 (100.0%)

Top changeset contributors by employer
Northern.tech	2 (100.0%)

Top lines changed by employer
Northern.tech	111 (100.0%)

Employers with the most hackers (total 1)
Northern.tech	1 (100.0%)

Changelogs

mender-connect (2.0.1)

New changes in mender-connect since 2.0.0:

• fix: Global spawned shells count is not always decremented.

mender-connect 2.0.0

Released 01.24.2022

Statistics

A total of 572 lines added, 949 removed (delta -377)

Developers with the most changesets
Lluis Campos	8 (100.0%)

Developers with the most changed lines
Lluis Campos	996 (100.0%)

Developers with the most lines removed
Lluis Campos	377 (39.7%)

Top changeset contributors by employer
Northern.tech	8 (100.0%)

Top lines changed by employer
Northern.tech	996 (100.0%)

Employers with the most hackers (total 1)
Northern.tech	1 (100.0%)

Changelogs

mender-connect (2.0.0)

New changes in mender-connect since 1.2.0:

• Deprecate configuration fields ServerURL , Servers, ServerCertificate, ClientProtocol, HTTPSClient and SkipVerify. The server configuration is obtained via D-Bus API, for which from Mender 3.2 onwards is a local proxy which uses mender.conf client settings to securely authenticate with the backend server, making the client settings in mender-connect.conf redundant. (MEN-5203)

• Several robustness fixes around re-connection

  • Trigger re-connection when either token or server URL obtained from D-Bus signal has changed. Previously, it was enough with having a token with "some length" for the code to believe the device was authenticated and not trigger a re-connect.
  • Abort connecting after 10 retries. Previously it would reconnect forever with the same server URL, which will result in a deadlock if the url (or the token) changed while re-connecting. (MEN-5290)

mender-connect 1.2.1

Released 02.09.2022

Statistics

A total of 215 lines added, 306 removed (delta -91)

Developers with the most changesets
Peter Grzybowski	2 (50.0%)
Lluis Campos	2 (50.0%)

Developers with the most changed lines
Lluis Campos	290 (72.3%)
Peter Grzybowski	111 (27.7%)

Developers with the most lines removed
Lluis Campos	186 (60.8%)

Top changeset contributors by employer
Northern.tech	4 (100.0%)

Top lines changed by employer
Northern.tech	401 (100.0%)

Employers with the most hackers (total 2)
Northern.tech	2 (100.0%)

Changelogs

mender-connect (1.2.1)

New changes in mender-connect since 1.2.0:

• Several robustness fixes around re-connection
  • Trigger re-connection when either token or server URL obtained from D-Bus signal has changed. Previously, it was enough with having a token with "some length" for the code to believe the device was authenticated and not trigger a re-connect.
  • Abort connecting after 10 retries. Previously it would reconnect forever with the same server URL, which will result in a deadlock if the url (or the token) changed while re-connecting. (MEN-5290)
• fix: Global spawned shells count is not always decremented.

mender-connect 1.2.0

Released 07.14.2021

Statistics

A total of 2823 lines added, 957 removed (delta 1866)

Developers with the most changesets
Alf-Rune Siqveland	8 (40.0%)
Ole Petter Orhagen	5 (25.0%)
Peter Grzybowski	4 (20.0%)
Manuel Zedel	2 (10.0%)
Kristian Amlie	1 (5.0%)

Developers with the most changed lines
Peter Grzybowski	1949 (64.8%)
Alf-Rune Siqveland	862 (28.7%)
Ole Petter Orhagen	152 (5.1%)
Manuel Zedel	42 (1.4%)
Kristian Amlie	1 (0.0%)

Top changeset contributors by employer
Northern.tech	20 (100.0%)

Top lines changed by employer
Northern.tech	3006 (100.0%)

Employers with the most hackers (total 5)
Northern.tech	5 (100.0%)

Changelogs

mender-connect (1.2.0)

New changes in mender-connect since 1.1.0:

• stat(2) file path and verify conditions before starting upload
• Add option to pass src_path to file upload requests
• FIX: Filetransfer owner restrictions checks username not (optional) real-name
• A Fix for group and owner file transfer limits
• Fix the terminal PATH issues in the standard shell by defaulting to starting a 'login' shell with the '--login' option. This can be controlled through the new configuration field 'ShellArguments', which you can set to whatever arguments you want passed to the shell on startup. (MEN-4505)
• Handle the re-connection request even if there is no new JWT token from the Mender client (MEN-4694)

mender-connect 1.1.1

Released 07.14.2021

Statistics

A total of 183 lines added, 47 removed (delta 136)

Developers with the most changesets
Ole Petter Orhagen	3 (75.0%)
Peter Grzybowski	1 (25.0%)

Developers with the most changed lines
Ole Petter Orhagen	132 (72.1%)
Peter Grzybowski	51 (27.9%)

Top changeset contributors by employer
Northern.tech	4 (100.0%)

Top lines changed by employer
Northern.tech	183 (100.0%)

Employers with the most signoffs (total 0)

Employers with the most hackers (total 2)
Northern.tech	2 (100.0%)

Changelogs

mender-connect (1.1.1)

New changes in mender-connect since 1.1.0:

• Fix the terminal PATH issues in the standard shell by defaulting to starting a 'login' shell with the '--login' option. This can be controlled through the new configuration field 'ShellArguments', which you can set to whatever arguments you want passed to the shell on startup. (MEN-4505)
• Handle the re-connection request even if there is no new JWT token from the Mender client (MEN-4694)

mender-connect 1.1.0

Released 04.16.2021

Changelogs

mender-connect (1.1.0)

New changes in mender-connect since 1.0.0:

• Add remote triggers for Mender client's check-update and send-inventory
• [examples/mender-connect.conf] Remove unnecessary ServerURL
• Add handler for File Transfer protocol. (MEN-4322)
• filetransfer: Add handler for fetching file and file info
• New feature: TCP and UDP port-forwarding
• stat(2) file path and verify conditions before starting upload
• Add option to pass src_path to file upload requests

mender-connect 1.0.3

Released 02.09.2022

Statistics

A total of 122 lines added, 428 removed (delta -306)

Developers with the most changesets
Lluis Campos	3 (100.0%)

Developers with the most changed lines
Lluis Campos	428 (100.0%)

Developers with the most lines removed
Lluis Campos	306 (71.5%)

Top changeset contributors by employer
Northern.tech	3 (100.0%)

Top lines changed by employer
Northern.tech	428 (100.0%)

Employers with the most hackers (total 1)
Northern.tech	1 (100.0%)

Changelogs

mender-connect (1.0.3)

New changes in mender-connect since 1.0.2:

• Several robustness fixes around re-connection
  • Trigger re-connection when either token or server URL obtained from D-Bus signal has changed. Previously, it was enough with having a token with "some length" for the code to believe the device was authenticated and not trigger a re-connect.
  • Abort connecting after 10 retries. Previously it would reconnect forever with the same server URL, which will result in a deadlock if the url (or the token) changed while re-connecting. (MEN-5290)

mender-connect 1.0.2

Released 07.14.2021

Statistics

A total of 184 lines added, 47 removed (delta 137)

Developers with the most changesets
Ole Petter Orhagen	2 (66.7%)
Peter Grzybowski	1 (33.3%)

Developers with the most changed lines
Ole Petter Orhagen	133 (72.3%)
Peter Grzybowski	51 (27.7%)

Top changeset contributors by employer
Northern.tech	3 (100.0%)

Top lines changed by employer
Northern.tech	184 (100.0%)

Employers with the most signoffs (total 0)

Employers with the most hackers (total 2)
Northern.tech	2 (100.0%)

Changelogs

mender-connect (1.0.2)

New changes in mender-connect since 1.0.1:

• Fix the terminal PATH issues in the standard shell by defaulting to starting a 'login' shell with the '--login' option. This can be controlled through the new configuration field 'ShellArguments', which you can set to whatever arguments you want passed to the shell on startup. (MEN-4505)
• Handle the re-connection request even if there is no new JWT token from the Mender client (MEN-4694)

mender-connect 1.0.1

Released 16.04.2021

Changelogs

mender-connect (1.0.1)

New changes in mender-connect since 1.0.0:

• [examples/mender-connect.conf] Remove unnecessary ServerURL

mender-connect 1.0.0

Released 01.20.2021

Changelogs

mender-connect (1.0.0)

• First release of mender-connect