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SSH login

SSH login

Created: Jun 30, 2020 12:54:32Latest reply: Jun 30, 2020 13:05:01 302 1 0 0 0
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Hi，

The customer has configured  ACL to restrict users to log in the switch S6700 V200R019C10. However, users in the IP addresses can still set up SSH connections with the switch and the user name and password can be normally input. 


Key configurations are as follows: 

# 

acl 2000 

rule 5 permit source 10.xxx.xxx.0 24 

rule 999 deny ip 

# 

user-interface vty 0 4 

acl 2000 inbound 

authentication-mode aaa 

protocol inbound ssh 

#


Symptom: 

[S6700] stelnet 10.xxx.xxx.2 

Trying 10.xxx.xxx.2 

Press CTRL + K to abort 

Connected to 10.xxx.xxx.2 

Please input the username: test 

Enter password: 


info: The connection was closed by remote host.


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Popeye_Wang
Admin Created Jun 30, 2020 13:05:01

Hi，

After the acl xxxx inbound command is configured in the VTY user interface view. When the IP addresses that are not allowed by the ACL log in to the device, the command can not prevent the device from displaying the user and entering the password.

There are two solutions. 

1. Configure the ACL on the SSH server.

   ssh server acl 2000 

2.Limiting traffic on the interface

# 

traffic classifier Deny_SSH 

if-match acl 2000 

# 

traffic behavior Deny_SSH 

quit 

# 

traffic policy Deny_SSH 

classifier Deny_SSH behavior Deny_SSH 

quit 

# 

interface Gx/x/x

traffic-policy Deny_SSH inbound 

#


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2#
Popeye_Wang
Popeye_Wang Admin Created Jun 30, 2020 13:05:01

Hi，

After the acl xxxx inbound command is configured in the VTY user interface view. When the IP addresses that are not allowed by the ACL log in to the device, the command can not prevent the device from displaying the user and entering the password.

There are two solutions. 

1. Configure the ACL on the SSH server.

   ssh server acl 2000 

2.Limiting traffic on the interface

# 

traffic classifier Deny_SSH 

if-match acl 2000 

# 

traffic behavior Deny_SSH 

quit 

# 

traffic policy Deny_SSH 

classifier Deny_SSH behavior Deny_SSH 

quit 

# 

interface Gx/x/x

traffic-policy Deny_SSH inbound 

#


View more
  • x
  • convention：
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