ansible telnet without username and password - ansible

Question

I have to make an ansible playbook that connects to a brand new cisco router via a telnet connection to a terminal concentrator on a specefic telnet port.
This is my playbook so far
---
- name: Telnet test
hosts: localhost
connection: local
tasks:
- name: telnet test
telnet:
host: 10.145.0.200
port: 4009
send_newline: yes
prompts:
- '[>|#]'
command:
- enable
- term len 0
- show ver
My issue is that when the connection is made the playbook just stay in the task without sending any command to the cisco router, how can i connect to a device without username and password?
i had to cancel the playbook since it will just stay in the task forever
ansible-playbook 2.9.13
config file = /home/niclas/ansible/gc/ansible.cfg
configured module search path = ['/home/niclas/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
ansible python module location = /home/niclas/.local/lib/python3.8/site-packages/ansible
executable location = /usr/bin/ansible-playbook
python version = 3.8.2 (default, Jul 16 2020, 14:00:26) [GCC 9.3.0]
Using /home/niclas/ansible/gc/ansible.cfg as config file
host_list declined parsing /home/niclas/ansible/gc/inventory.yml as it did not pass its verify_file() method
Parsed /home/niclas/ansible/gc/inventory.yml inventory source with ini plugin
PLAYBOOK: testTelnet.yml ***********************************************************************************************
1 plays in testTelnet.yml
PLAY [Telnet test] *****************************************************************************************************
META: ran handlers
TASK [telnet test] *****************************************************************************************************
task path: /home/niclas/ansible/gc/testTelnet.yml:6
^C [ERROR]: User interrupted execution
Edit error:
❯ ansible-playbook testTelnet.yml -vvv
ansible-playbook 2.9.13
config file = /home/niclas/ansible/gc/ansible.cfg
configured module search path = ['/home/niclas/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
ansible python module location = /home/niclas/.local/lib/python3.8/site-packages/ansible
executable location = /usr/bin/ansible-playbook
python version = 3.8.2 (default, Jul 16 2020, 14:00:26) [GCC 9.3.0]
Using /home/niclas/ansible/gc/ansible.cfg as config file
host_list declined parsing /home/niclas/ansible/gc/inventory.yml as it did not pass its verify_file() method
Parsed /home/niclas/ansible/gc/inventory.yml inventory source with ini plugin
PLAYBOOK: testTelnet.yml ***********************************************************************************************
1 plays in testTelnet.yml
PLAY [Telnet test] *****************************************************************************************************
META: ran handlers
TASK [telnet test] *****************************************************************************************************
task path: /home/niclas/ansible/gc/testTelnet.yml:6
The full traceback is:
Traceback (most recent call last):
File "/home/niclas/.local/lib/python3.8/site-packages/ansible/executor/task_executor.py", line 147, in run
res = self._execute()
File "/home/niclas/.local/lib/python3.8/site-packages/ansible/executor/task_executor.py", line 665, in _execute
result = self._handler.run(task_vars=variables)
File "/home/niclas/.local/lib/python3.8/site-packages/ansible/plugins/action/telnet.py", line 59, in run
tn = telnetlib.Telnet(host, port, timeout)
File "/usr/lib/python3.8/telnetlib.py", line 218, in __init__
self.open(host, port, timeout)
File "/usr/lib/python3.8/telnetlib.py", line 235, in open
self.sock = socket.create_connection((host, port), timeout)
File "/usr/lib/python3.8/socket.py", line 808, in create_connection
raise err
File "/usr/lib/python3.8/socket.py", line 796, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused
fatal: [localhost]: FAILED! => {
"msg": "Unexpected failure during module execution.",
"stdout": ""
}
PLAY RECAP *************************************************************************************************************
localhost : ok=0 changed=0 unreachable=0 failed=1 skipped=0 rescued=0 ignored=0

Answer 1

I think the ansible's command interpreter can't understand the promt from the cisco. I think you should use cisco.ios plugin instead which is described here: https://docs.ansible.com/ansible/latest/collections/cisco/ios/ios_command_module.html
UPDATE
Because the telnet task does not understand cisco.ios commands, then you should use another approach for connecting. Hope your cisco device support SSH, then you can make the connection.
In this case, I think your playbook should look like this:
ansible_connection: ansible.netcommon.network_cli
ansible_network_os: cisco.ios.ios
ansible_user: cisco
ansible_password: ciscopass
ansible_become: yes
ansible_become_method: enable
ansible_become_password: if_you_have_enable_password_define_it_here
---
- hosts: ansible.ini_defined_group_name_for_cisco_device
tasks:
- name: log into cisco device and init this commands
cisco.ios.ios_command:
commands:
- show version
- term len 0