NTP Access Control Menu
Page 12-40
limited
These hosts are subject to a limitation of the number of clients
from the same net. Net in this context refers to the IP notion of
net (class
A
, class
B
, class
C
, etc.). Only the first client limit
hosts that have shown up at the server and that have been
active during the last client limit period (in seconds) are
accepted. Requests from other clients from the same net are
rejected. Only time request packets are taken into account.
Query packets sent by the ntpq and xntpdc programs are not
subject to these limits. A history of clients is kept using the
monitoring capability of xntpd. Thus, monitoring is always
active as long as there is a restriction entry with the limited flag.
For more information on enabling monitoring, see
Turn the
Server's Monitoring Facility On or Off
on page 12-31.
ntpport
This is actually a match algorithm modifier, rather than a restric-
tion flag. Its presence causes the restriction entry to be matched
only if the source port in the packet is the standard
NTP
UDP
port (123). Both
ntpport
and
non-ntpport
may be specified. The
ntpport
is considered more specific and is sorted later in the list.
View the Server's Restrict List
The
ntpvres
command allows you to view a list of all the configured restrictions for the
switch. To view a list of configured restriction, enter the
ntpvres
command at the system
prompt. A screen similar to the following appears:
address
mask
count
flags
==============================================================
0.0.0.0
0.0.0.0
12
none
127.0.0.1
255.255.255.255
0
ntpport, ignore
Field Descriptions
The following section describes the fields displayed with the
ntpvres
command.
address
. The
IP
address of the
NTP
entity for which flags have been configured.
mask
. The subnet mask of the
NTP
entity for which flags have been configured.
count
. The number of
NTP
messages from the
NTP
entity that have been affected by the
configured flags.
flags
. The flags configured for this
NTP
entity. For a description of all possible flags, see
Create Restrict Entry/Add Flags to Entry
on page 12-39.
Summary of Contents for Omni Switch/Router
Page 1: ...Part No 060166 10 Rev C March 2005 Omni Switch Router User Manual Release 4 5 www alcatel com ...
Page 4: ...page iv ...
Page 110: ...WAN Modules Page 3 40 ...
Page 156: ...UI Table Filtering Using Search and Filter Commands Page 4 46 ...
Page 164: ...Using ZMODEM Page 5 8 ...
Page 186: ...Displaying and Setting the Swap State Page 6 22 ...
Page 202: ...Creating a New File System Page 7 16 ...
Page 270: ...Displaying Secure Access Entries in the MPM Log Page 10 14 ...
Page 430: ...OmniChannel Page 15 16 ...
Page 496: ...Configuring Source Route to Transparent Bridging Page 17 48 ...
Page 542: ...Dissimilar LAN Switching Capabilities Page 18 46 ...
Page 646: ...Application Example DHCP Policies Page 20 30 ...
Page 660: ...GMAP Page 21 14 ...
Page 710: ...Viewing the Virtual Interface of Multicast VLANs Page 23 16 ...
Page 722: ...Application Example 5 Page 24 12 ...
Page 788: ...Viewing UDP Relay Statistics Page 26 24 ...
Page 872: ...The WAN Port Software Menu Page 28 46 ...
Page 960: ...Deleting a PPP Entity Page 30 22 ...
Page 978: ...Displaying Link Status Page 31 18 ...
Page 988: ...Displaying ISDN Configuration Entry Status Page 32 10 ...
Page 1024: ...Backup Services Commands Page 34 14 ...
Page 1062: ...Diagnostic Test Cable Schematics Page 36 24 ...
Page 1072: ...Configuring a Switch with an MPX Page A 10 ...
Page 1086: ...Page B 14 ...
Page 1100: ...Page I 14 Index ...