Protocol Inbound - Huawei Quidway S3900 series Command Manual

Command Manual – Login
Quidway S3900 Series Ethernet Switches-Release 1510

1.1.15 protocol inbound

Syntax
protocol inbound { all | ssh | telnet }
View
User interface view
Parameter
all: Supports both Telnet protocol and SSH protocol.
ssh: Supports SSH protocol.
telnet: Supports Telnet protocol.
Description
Use the protocol inbound command to specify the protocols supported by the user
interface.
Both Telnet protocol and SSH protocol are supported by default.
Related command: user-interface vty.
Note:
To improve security and avoid malicious attack to the unused SOCKETs, TCP 23 and
TCP 22 ports for Telnet and SSH services respectively will be enabled or disabled after
corresponding configurations.
If the authentication mode is none, TCP 23 will be enabled, and TCP 22 will be
disabled.
If the authentication mode is password, and the corresponding password has been
set, TCP 23 will be enabled, and TCP 22 will be disabled.
If the authentication mode is scheme, there are three scenarios: when the
supported protocol is specified as telnet, TCP 23 will be enabled; when the
supported protocol is specified as ssh, TCP 22 will be enabled; when the supported
protocol is specified as all, both the TCP 23 and TCP 22 port will be enabled.
Example
# Configure that only SSH protocol is supported in VTY 0.
<Quidway> system-view
System View: return to User View with Ctrl+Z.
[Quidway] user-interface vty 0
[Quidway-ui-vty0] protocol inbound ssh
Huawei Technologies Proprietary
1-15
Chapter 1 Login Commands