the hostname could not be number

[dfang]

sample from generated ~/ssh/.config

# This file was automatically generated by assh vn/a (n/a)
# on 2023-09-30 10:28:23 +0800 CST, based on ~/.ssh/assh.yml
#
# more info: https://github.com/moul/assh

# host-based configuration
Host 101
  Port 22
  User root
  # HostName: 192.168.2.101

Host 110
  Port 22
  User deploy
  # HostName: 192.168.2.110

log

λ ssh 101 -vvv
OpenSSH_9.3p1, OpenSSL 1.1.1u  30 May 2023
debug1: Reading configuration data /Users/kb24/.ssh/config
debug1: /Users/kb24/.ssh/config line 7: Applying options for 101
debug1: /Users/kb24/.ssh/config line 130: Applying options for *
debug1: Reading configuration data /usr/local/etc/ssh/ssh_config
debug2: resolve_canonicalize: hostname 101 is address
debug2: resolve_canonicalize: canonicalised address "101" => "0.0.0.101"
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts' -> '/Users/kb24/.ssh/known_hosts'
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts2' -> '/Users/kb24/.ssh/known_hosts2'
debug1: auto-mux: Trying existing master
debug1: Control socket "/Users/kb24/.ssh/sockets/[email protected]" does not exist
debug1: Executing proxy command: exec /Users/kb24/bin/assh connect --port=22 0.0.0.101
debug1: identity file /Users/kb24/.ssh/id_rsa type 0
debug1: identity file /Users/kb24/.ssh/id_rsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_9.3
DEBUG	initializing proxy	{"target": "0.0.0.101"}
DEBUG	Loading config file	{"file": "/Users/kb24/.ssh/assh.yml"}
DEBUG	Loaded config file	{"file": "/Users/kb24/.ssh/assh.yml", "num-host-before": 0, "num-host-after": 24, "num-host-diff": 24}
DEBUG	Failed to load assh known_hosts	{"error": "open /Users/kb24/.ssh/assh_known_hosts: no such file or directory"}
DEBUG	generated ssh config file	{"buffer": "Host 0.0.0.101\n  ControlMaster auto\n  ControlPath ~/.ssh/sockets/%r@%h-%p.sock\n  ControlPersist 600\n  IdentityFile ~/.ssh/id_rsa\n  Port 22\n  StrictHostKeyChecking no\n  User deploy\n  # HostName: 0.0.0.101\n  # Hooks: {\"AfterConfigWrite\":[\"exec cat ~/.ssh/my-heroku-generated-config \\u003e\\u003e {{.SSHConfigPath}}\",\"notify \\\"{{.SSHConfigPath}} has been rewritten\\\"\"],\"BeforeConfigWrite\":[\"exec set -x; cp {{.SSHConfigPath}} {{.SSHConfigPath}}.bkp\"],\"OnConnect\":[\"exec printf '{{.}}' | jq . \\u003e\\u003e ~/.ssh/last_connected_host.txt\",\"notify New SSH connection to {{.Host.Prototype}} at {{.Stats.ConnectedAt}}\",\"write New SSH connection to {{.Host.Prototype}}\"],\"OnDisconnect\":[\"write  SSH connection to {{.Host.HostName}} closed, {{.Stats.WrittenBytes }} bytes written in {{.Stats.ConnectionDuration}} ({{.Stats.AverageSpeed}}bps)\",\"notify SSH connection to {{.Host.HostName}} closed, {{.Stats.WrittenBytes }} bytes written in {{.Stats.ConnectionDuration}} ({{.Stats.AverageSpeed}}bps)\"]}\n"}
DEBUG	Host	{"host": "{\"ControlMaster\":\"auto\",\"ControlPath\":\"~/.ssh/sockets/%r@%h-%p.sock\",\"ControlPersist\":\"600\",\"IdentityFile\":[\"~/.ssh/id_rsa\"],\"Port\":\"22\",\"StrictHostKeyChecking\":\"no\",\"User\":\"deploy\",\"HostName\":\"0.0.0.101\",\"Hooks\":{\"AfterConfigWrite\":[\"exec cat ~/.ssh/my-heroku-generated-config \\u003e\\u003e {{.SSHConfigPath}}\",\"notify \\\"{{.SSHConfigPath}} has been rewritten\\\"\"],\"BeforeConfigWrite\":[\"exec set -x; cp {{.SSHConfigPath}} {{.SSHConfigPath}}.bkp\"],\"OnConnect\":[\"exec printf '{{.}}' | jq . \\u003e\\u003e ~/.ssh/last_connected_host.txt\",\"notify New SSH connection to {{.Host.Prototype}} at {{.Stats.ConnectedAt}}\",\"write New SSH connection to {{.Host.Prototype}}\"],\"OnDisconnect\":[\"write  SSH connection to {{.Host.HostName}} closed, {{.Stats.WrittenBytes }} bytes written in {{.Stats.ConnectionDuration}} ({{.Stats.AverageSpeed}}bps)\",\"notify SSH connection to {{.Host.HostName}} closed, {{.Stats.WrittenBytes }} bytes written in {{.Stats.ConnectionDuration}} ({{.Stats.AverageSpeed}}bps)\"]}}"}
DEBUG	Proxying
DEBUG	Connecting without gateway
DEBUG	Preparing host object
DEBUG	Calling BeforeConnect hooks
DEBUG	Connecting to host	{"hostname": "0.0.0.101", "port": "22"}
DEBUG	Calling OnConnectError hooks
Error: failed to dial: dial tcp 0.0.0.101:22: connect: no route to host
Usage:
  assh connect [flags]

Examples:
Argument is a host.

Flags:
      --dry-run      Only show how assh would connect but don't actually do it
  -h, --help         help for connect
      --no-rewrite   Do not automatically rewrite outdated configuration
  -p, --port int     SSH destination port

failed to dial: dial tcp 0.0.0.101:22: connect: no route to host
kex_exchange_identification: Connection closed by remote host
Connection closed by UNKNOWN port 65535

why the hostname is # HostName: 192.168.2.101 in generated ~/.ssh/config, not hostname 192.168.2.101, Can I customize the template before building config?

[ghost]

Hi! I am running into the same problem. Has it been solved?

[uberjay]

This just started happening for me, today... Could have been post-homebrew-upgrade, but unfortunately wasn't paying enough attention to notice when it broke.

EDIT: The hostname is supposed to be commented out, i realized -- the actual connection is made using assh connect --port=<port> <host>. Bizarrely, this command is triggering a no route to host error for me, all of a sudden:

$ /usr/local/bin/assh connect --port=22 10.0.10.1
Error: failed to dial: dial tcp 10.0.10.1:22: connect: no route to host
Usage:
  assh connect [flags]

Examples:
Argument is a host.

Flags:
      --dry-run      Only show how assh would connect but don't actually do it
  -h, --help         help for connect
      --no-rewrite   Do not automatically rewrite outdated configuration
  -p, --port int     SSH destination port

failed to dial: dial tcp 10.0.10.1:22: connect: no route to host

ssh (using a config to bypass assh) works fine:

$ /usr/bin/ssh -F plain_ssh 10.0.10.1
SSH@sw-core>

other tools (e.g, netcat) also connect successfully.

I'm running assh 2.16.0, freshly re-installed with brew on macOS 15.1.

Other IP addresses seem to connect fine. This happens to (as far as I can tell) only affect sshing to the IP address which is also the default gateway for my host's primary IP address... 😕

[uberjay]

Turns out, in my case, this is golang running afoul of a newer macOS security mechanism.

I guess this will be fixed when a fixed go compiler is used to build assh. (for homebrew)