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TELNET ERROR LOGIN FAIL

TELNET ERROR LOGIN FAIL

Latest reply: Dec 10, 2019 07:08:37 1787 7 3 0 2
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Hi everyone, has anyone experience login fail using telnet even entering the correct username and password, and i have to wait few minutes so that i can successfully access the router via telnet. This is always happening to me when i access my client's AR1220. Thanks in advance!






telnet router fail


ar1200AR1220 routertelnet failure

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2#
yogijain
HCIE Created Dec 6, 2019 07:12:57

A Device Fails to Be Logged In Using Telnet

Fault Description

The Telnet server fails to be logged in using Telnet.

Possible Causes

  • The number of users who log in to the device reaches the upper limit.

  • ACL limitation is configured in the VTY user interface view on the device.

  • The allowed protocol in the VTY user interface view is incorrectly configured.

  • Login authentication is configured in the user interface view.

Troubleshooting Procedure

  1. Check whether the number of login users reaches the upper limit.

    Log in to the device through the console port and run the display users command to check whether all VTY user interfaces are in use. By default, the maximum number of VTY user interfaces is 5. You can run the display user-interface maximum-vty command to check the maximum number of login users allowed by the device.

    If the number of login users reaches the upper limit, run the user-interface maximum-vty 15 command to increase the maximum number of login users to 15.

  2. Check whether an ACL is configured in the VTY user interface view (Telnet IPv4 is used as an example).

    Run the user-interface vty command on the Telnet server to enter the user interface view and then run the display this command to check whether an ACL is configured in the VTY user interface view. If so, record the ACL number.

    Run the display acl acl-number command on the Telnet server to check whether the IP address of the Telnet client is denied in the ACL. If so, run the undo rule rule-id command in the ACL view to delete the deny rule and then run the corresponding command to modify the ACL and permit the IP address of the client.

  3. Check whether the access protocol is correctly configured in the VTY user interface view.

    Run the user-interface vty command on the Telnet server to enter the user interface view and then run the display this command to check whether protocol inbound is set to telnet or all. If not, run the protocol inbound { telnet | all } command to allow Telnet users to connect to the device.

  4. Check whether an authentication mode is set for login users in the user interface view.

  • If password authentication is configured using the authentication-mode password command, you must enter the password upon login.

  • If AAA authentication is configured using the authentication-mode aaa command, you must run the local-user command to create a local AAA user.

If the fault persists, collect error information and contact technical support personnel.


https://support.huawei.com/enterprise/en/doc/EDOC1000079719/e6465c2f/a-device-fails-to-be-logged-in-using-telnet
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3#
chenhui
Admin Created Dec 6, 2019 07:28:39

@JNL hello,
Is it possible that you pressed other keys unintentionally while typing?
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4#
JNL
Created Dec 6, 2019 07:31:41

Posted by chenhui at 2019-12-06 07:28 @JNL hello, Is it possible that you pressed other keys unintentionally while typing?
Nope. Im sure i entered the correct credentials, and also the username and password is saved in the putty session for easy access so that i dont have to type the credentials in my first login. And im the only user using the router.
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5#
chenhui
Admin Created Dec 9, 2019 00:51:02

Posted by JNL at 2019-12-06 07:31 Nope. Im sure i entered the correct credentials, and also the username and password is saved in th ...
Well, did this happen all the time or occasionally?
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6#
lucian2003
Created Dec 9, 2019 12:53:51

Check the keyboard language. There are keyboards with problems that give you up to two lectures when typing.
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7#
JNL
Created Dec 10, 2019 07:08:37

Posted by lucian2003 at 2019-12-09 12:53 Check the keyboard language. There are keyboards with problems that give you up to two lectures when ...
im not sure. because in my putty the credentials are already saved and i dont have to type the username and password when im logging in
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lucian2003
lucian2003 Created Dec 14, 2019 19:41:59 (0) (0)
I use SecureCRT, i test putty. when i use telnet i can´t save user and password then i test putty then  
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