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Remote login failure afte...

Remote login failure after the upgrade

Created: Nov 26, 2020 07:38:46Latest reply: Nov 26, 2020 09:32:30 462 2 0 0 0
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Hi all,

After a CE6800 switch is upgraded to V200R019C10SPC800, Telnet and SSH cannot be used to log in to the switch. We have checked the SSH and Telnet configurations, including the service status, AAA, VTY, and user level. The device status and configuration are normal.

<HUAWEI> display telnet server

Telnet server                     : Enable

Telnet server port                : 23

Telnet IPv6 server                : Disable

Telnet IPv6 server port           : 23

Telnet server source address      : 0.0.0.0

TELNET ipv6 server source address : 0::0

TELNET ipv6 server source vpnName :

ACL name                          : --

ACL number                        : --

ACL6 name                         : --


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Popeye_Wang
Admin Created Nov 26, 2020 07:39:23

Hello,

A Telnet/SSH server receives login requests from all interfaces and addresses, leading to low system security. To improve system security, from V200R019C10SPC800, a source interface or source IPv6 address for the Telnet/SSH server needed to be specified. Then only authorized users can log in to the SSH server.

If no source interface is specified using the telnet server-source/ssh server-source command after the system starts with base configuration, users cannot log in to the system through Telnet/SSH

Refer to: https://support.huawei.com/hedex/hdx.do?docid=EDOC1100136525&id=EN-US_CLIREF_0141121407&lang=en

https://support.huawei.com/hedex/hdx.do?docid=EDOC1100136525&id=EN-US_CLIREF_0141121397&lang=en


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Popeye_Wang
Popeye_Wang Admin Created Nov 26, 2020 07:39:23

Hello,

A Telnet/SSH server receives login requests from all interfaces and addresses, leading to low system security. To improve system security, from V200R019C10SPC800, a source interface or source IPv6 address for the Telnet/SSH server needed to be specified. Then only authorized users can log in to the SSH server.

If no source interface is specified using the telnet server-source/ssh server-source command after the system starts with base configuration, users cannot log in to the system through Telnet/SSH

Refer to: https://support.huawei.com/hedex/hdx.do?docid=EDOC1100136525&id=EN-US_CLIREF_0141121407&lang=en

https://support.huawei.com/hedex/hdx.do?docid=EDOC1100136525&id=EN-US_CLIREF_0141121397&lang=en


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Peterhof
Peterhof Author Created Nov 26, 2020 09:32:30

If you will get error when connecting with PuTTY try to update it (PuTTY). In some cases switch and PuTTY may use different sets of security protocols.
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