Ntp-service access, Syntax, View, Parameter | 3Com 10014302 instruction

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

Contents

Published January Command Reference Guide Addendum for3Com Router Download the 3Com Router Configuration Guide from Download the Router 3000 Installation Guide fromDownload the Router 5000 Installation Guide from Download the 3Com Router Command Reference Guide from View Chapter 1 CBQ Configuration Commands1.1 af Syntax undo car 1.2 carcar cir rate cbs size ebs size conform action exceed action number 1.3 debugging qos display qos cbq interface type number 1.4 display qos cbq interface display qos policy policy-name class class-name 1.5 display qos class1.6 display qos policy display qos class class-name 3Com display qos policy display qos policy interface type number inbound outbound 1.7 display qos policy interface Behaviors Default Queue Flow Based Fair Queueing ef bandwidth bandwidth cbs size undo ef 1.8 ef gts cir rate cbs size ebs size queue-length length undo gts 1.9 gts undo if-match logic-not acl acl-number 1.10 if-match aclif-match logic-not acl acl-number if-match logic-not any undo if-match logic-not any 1.11 if-match anyaccess-list-number ACL number undo if-match logic-not class class-name 1.12 if-match classif-match logic-not class class-name if-match logic-not criteria undo if-match logic-not criteria 1.13 if-match criteria if-match logic-not inbound-interface type number 1.14 if-match inbound-interface1.15 if-match ip-dscp number Interface number undo if-match logic-not ip-precedence value value … 1.16 if-match ip-precedenceif-match logic-not ip-precedence value value … undo if-match logic-not destination-mac source-mac mac-address 1.17 if-match mac-addressif-match logic-not destination-mac source-mac mac-address undo if-match logic-not protocol ip 1.18 if-match protocolif-match logic-not protocol ip undo qmtoken 1.19 if-match rtp1.20 qmtoken qmtoken token-number 1.21 qos apply policy undo qos class logic-and logic-or class-name 1.22 qos classqos class logic-and logic-or class-name qos max-bandwidth kilobits undo qos max-bandwidth 1.23 qos max-bandwidth qos policy policy-name undo qos policy policy-name 1.24 qos policy qos reserved-bandwidth pct percent undo qos reserved-bandwidth 1.25 qos reserved-bandwidth queue-length queue-length undo queue-length queue-length 1.26 qos-class1.27 queue-length qos-class class-name undo qos-class class-name remark ip-dscp value undo remark ip-dscp value 1.28 remark ip-dscp remark ip-precedence value undo remark ip-precedence value 1.29 remark ip-precedence undo wfq 1.30 wfq1.31 wred wfq queue-number total-queue-number undo wred ip-dscp dscp-value 1.32 wred ip-dscpundo wred ip-dscp ip-precedence discard-prob Example undo wred ip-precedence value 1.33 wred ip-precedence wred weighting-constant exponent undo wred weighting-constant 1.34 wred weighting-constant interface-type interface-number Interface name and number Chapter 2 TACACS+ Configuration Commands2.1 debugging hwtacacs 2.2 display hwtacacs accounting Example 2.3 display hwtacacs server domain undo domain 2.4 domainFor a related command, see reset hwtacacs server statistics 2.5 host Description Warning Reach the max limited of server in one template 2.6 hwtacacs-server template reset hwtacacs server statistics 2.7 reset hwtacacs accounting statistics2.8 reset hwtacacs server statistics reset hwtacacs accounting statistics shared-key key-string 2.9 shared-key undo source-ip 2.10 source-ip 2.11 timer quiet debugging rsa undo debugging rsa Chapter 3 SSH Configuration Commands3.1 debugging rsa 3.2 debugging ssh server display rsa local-key-pair public 3.3 display rsa local-key-pair public 3Com display rsa local-key-pair public display rsa peer-public-key brief name keyname 3.4 display rsa peer-public-key display ssh server status session 3.5 display ssh server hex hex-data 3.6 display ssh user-information3.7 hex display ssh user-information username D6C54A36 kill ssh all userID userid 3.8 kill ssh protocol inbound ssh telnet numbers acl acl-number 3.9 protocol inbound public-key-code begin 3.10 public-key-code begin public-key-code end 3.11 public-key-code end rsa local-key-pair create 3.12 rsa local-key-pair create rsa local-key-pair destroy 3.13 rsa local-key-pair destroy rsa peer-public-key key-name undo rsa peer-public-key key-name 3.14 rsa peer-public-key undo ssh server authentication-retries 3.15 ssh server authentication-retriesssh server authentication-retries times ssh server rekey-interval hours undo ssh server rekey-interval 3.17 ssh server timeout3.16 ssh server rekey-interval ssh server timeout seconds undo ssh server timeout undo ssh user username assign rsa-key 3.18 ssh user username assign rsa-keyssh user username assign rsa-key keyname undo ssh user username authentication-type password RSA all 3.19 ssh user authentication-typessh user username authentication-type password RSA all 3Com ssh user smith authentication-type password 4.1 debugging ntp-service Chapter 4 NTP Configuration Commands display ntp-service sessions verbose 4.2 display ntp-service sessions display ntp-service status 4.3 display ntp-service status display ntp-service trace 4.4 display ntp-service trace undo ntp-service access query synchronization server peer 4.5 ntp-service accessntp-service access query synchronization server peer acl-number undo ntp-service authentication enable 4.6 ntp-service authentication enable4.7 ntp-service authentication-keyid ntp-service authentication enable ntp-service broadcast-client undo ntp-service broadcast-client 4.8 ntp-service broadcast-client 4.9 ntp-service broadcast-server undo ntp-service max-dynamic-sessions 4.10 ntp-service max-dynamic-sessions4.11 ntp-service multicast-client ntp-service max-dynamic-sessions number undo ntp-service multicast-server 4.12 ntp-service multicast-server 4.13 ntp-service refclock-master undo ntp-service reliable authentication-keyid number 4.14 ntp-service reliable authentication-keyidntp-service reliable authentication-keyid number undo ntp-service source-interface 4.15 ntp-service source-interface 4.17 ntp-service unicast-peer 4.16 ntp-service source-interface disable undo ntp-service unicast-peer undo ntp-service unicast-server 4.18 ntp-service unicast-server 3Com ntp-service unicast-server 128.108.22.44 version debugging x25 x2t all event packet Chapter 5 X2T Configuration Commands5.1 debugging x25 x2t 5.2 display x25 x2t route translate ip ip-address port port-number x25 x.121-address 5.3 display x25 x2t switch-table5.4 translate ip display x25 x2t switch-table undo translate ip ip-address port port-number 5.5 translate Routertranslate x25 12322 ip 10.110.54.19 port 6.1 isdn ignore callednum Chapter 6 Additional ISDN Configuration Commands 3Com-E1-0 interface serial 215 3Com-serial215 isdn ignore callednum 6.2 isdn ignore hlc 6.4 isdn waitconnectack 6.3 isdn ignore llc Parameter 6.5 display isdn spidSyntax View Example 6.6 isdn ignore dchan 6.7 isdn protocol-type undo isdn q931-timer timer-name all 6.8 isdn q931-timer 6.9 isdn spid auto-trigger 6.10 isdn spid nit 6.11 isdn spid timer 6.12 isdn spid resend Example 6.13 isdn spid service3Com-bri0 isdn spid service data 3Com-bri0/0 isdn spid service speech 6.15 isdn spid2 6.14 isdn spid1 3Com-bri0 isdn spid2