Connection refused when opening file on sublime text on Mac mini M1

[chengguan]

Thanks in advance for the great work!

Host: I have install Sublime Text (build 4126) on my Mac.
Device: Raspberry pi with Ubuntu 22.04

After I installed rsub on my rpi, I tried using rsub to open text file on device with the following sequence but the connection failed:

chengguan@Chengs-Mac-mini StudioProjects % cat ~/.ssh/config
Host rpi
Hostname 192.168.68.122
User ubuntu
RemoteForward 52698 localhost:52698% chengguan@Chengs-Mac-mini StudioProjects % ssh rpi -v
OpenSSH_8.1p1, LibreSSL 2.7.3
debug1: Reading configuration data /Users/chengguan/.ssh/config
debug1: /Users/chengguan/.ssh/config line 1: Applying options for rpi
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 47: Applying options for *
debug1: Connecting to 192.168.68.122 [192.168.68.122] port 22.
debug1: Connection established.
debug1: identity file /Users/chengguan/.ssh/id_rsa type -1
debug1: identity file /Users/chengguan/.ssh/id_rsa-cert type -1
debug1: identity file /Users/chengguan/.ssh/id_dsa type -1
debug1: identity file /Users/chengguan/.ssh/id_dsa-cert type -1
debug1: identity file /Users/chengguan/.ssh/id_ecdsa type -1
debug1: identity file /Users/chengguan/.ssh/id_ecdsa-cert type -1
debug1: identity file /Users/chengguan/.ssh/id_ed25519 type -1
debug1: identity file /Users/chengguan/.ssh/id_ed25519-cert type -1
debug1: identity file /Users/chengguan/.ssh/id_xmss type -1
debug1: identity file /Users/chengguan/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.9p1 Ubuntu-3
debug1: match: OpenSSH_8.9p1 Ubuntu-3 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 192.168.68.122:22 as 'ubuntu'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: [email protected] MAC: compression: none
debug1: kex: client->server cipher: [email protected] MAC: compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:vyzqB9raWRFbEqHLIHJv5n2gdu3VQR79V2AMjavyAOI
debug1: Host '192.168.68.122' is known and matches the ECDSA host key.
debug1: Found key in /Users/chengguan/.ssh/known_hosts:1
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 134217728 blocks
debug1: Will attempt key: /Users/chengguan/.ssh/id_rsa
debug1: Will attempt key: /Users/chengguan/.ssh/id_dsa
debug1: Will attempt key: /Users/chengguan/.ssh/id_ecdsa
debug1: Will attempt key: /Users/chengguan/.ssh/id_ed25519
debug1: Will attempt key: /Users/chengguan/.ssh/id_xmss
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,[email protected],ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected]>
debug1: kex_input_ext_info: [email protected] (unrecognised)
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: /Users/chengguan/.ssh/id_rsa
debug1: Trying private key: /Users/chengguan/.ssh/id_dsa
debug1: Trying private key: /Users/chengguan/.ssh/id_ecdsa
debug1: Trying private key: /Users/chengguan/.ssh/id_ed25519
debug1: Trying private key: /Users/chengguan/.ssh/id_xmss
debug1: Next authentication method: password
[email protected]'s password:
debug1: Authentication succeeded (password).
Authenticated to 192.168.68.122 ([192.168.68.122]:22).
debug1: Remote connections from LOCALHOST:52698 forwarded to local address localhost:52698
debug1: channel 0: new [client-session]
debug1: Requesting [email protected]
debug1: Entering interactive session.
debug1: pledge: network
debug1: client_input_global_request: rtype [email protected] want_reply 0
debug1: remote forward success for: listen 52698, connect localhost:52698
debug1: All remote forwarding requests processed
debug1: Sending environment.
debug1: Sending env LC_ALL = en_US.UTF-8
debug1: Sending env LC_CTYPE = UTF-8
Welcome to Ubuntu 22.04 LTS (GNU/Linux 5.15.0-1005-raspi aarch64)

• Documentation: https://help.ubuntu.com
• Management: https://landscape.canonical.com
• Support: https://ubuntu.com/advantage

System information as of Fri Apr 29 02:01:20 UTC 2022

System load: 0.080078125 Temperature: 42.4 C
Usage of /: 31.3% of 28.68GB Processes: 182
Memory usage: 19% Users logged in: 0
Swap usage: 0% IPv4 address for wlan0: 192.168.68.122

• Super-optimized for small spaces - read how we shrank the memory
  footprint of MicroK8s to make it the smallest full K8s around.

  https://ubuntu.com/blog/microk8s-memory-optimisation

9 updates can be applied immediately.
7 of these updates are standard security updates.
To see these additional updates run: apt list --upgradable

Last login: Fri Apr 29 01:46:31 2022 from 192.168.68.105
ubuntu@ubuntu:$ rsub test.txt
debug1: client_input_channel_open: ctype forwarded-tcpip rchan 3 win 2097152 max 32768
debug1: client_request_forwarded_tcpip: listen localhost port 52698, originator 127.0.0.1 port 40900
debug1: connect_next: host localhost ([127.0.0.1]:52698) in progress, fd=7
debug1: channel 1: new [127.0.0.1]
debug1: confirm forwarded-tcpip
debug1: channel 1: connection failed: Connection refused
connect_to localhost port 52698: failed.
debug1: channel 1: free: 127.0.0.1, nchannels 2
ubuntu@ubuntu:$