3Com 10014302 manual ntp-service access, Syntax, View, Parameter, Description, Example

3Com Router Command Reference Guide Addendum for V1.2

4.5 ntp-service access

Syntax

ntp-service access { query synchronization server peer } acl-number

undo ntp-service access { query synchronization server peer }

View

System view

Parameter

query: Assigns the controlled query right.

synchronization: Allows only the server to access.

server: Allows the server and query to access.

peer: Full access right.

acl-number: IP ACL number. The basic ACL can be numbered in the range of 1 to 99.

Description

Using the ntp-service access command, you can control the access to the service provided by the local device. Using the undo ntp-service access command, you can remove the configured access rights.

By default, there is no access restriction.

This command can be used to control the access to the NTP services of the local device. It just provides a minimum security protection, however. To obtain much reliable security, you must configure authentication. Whenever receiving an access request, the router will perform the match operation to find out the access right assigned to the requestor in the descending order of access rights, i.e., peer, server, synchronization, and query. The match found first will be the service access right assigned to the requestor.

Example

Assign the peer access right to the peers in ACL 76.

[3Com] ntp-service access peer 76

Assign the synchronization access right to the peers in ACL 28.

[3Com] ntp-service access synchronization 28

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