3com WX2200 3CRWX220095A Manuel D’Utilisation

Page de 728
30
C
HAPTER
 1: U
SING
 
THE
 C
OMMAND
-L
INE
 I
NTERFACE
Wildcard Masks
Security access control lists (ACLs) use source and 
destination IP addresses and wildcard masks to determine whether the 
WX filters or forwards IP packets. Matching packets are either permitted 
or denied network access. The ACL checks the bits in IP addresses that 
correspond to any 0s (zeros) in the mask, but does not check the bits that 
correspond to 1s (ones) in the mask. You specify the wildcard mask in 
dotted decimal notation. 
For example, the address 10.0.0.0 and mask 0.255.255.255 match all IP 
addresses that begin with 10 in the first octet.
The ACL mask must be a contiguous set of zeroes starting from the first 
bit. For 
example, 0.255.255.255, 0.0.255.255, and 0.0.0.255 are valid 
ACL masks. 
However, 0.255.0.255 is not a valid ACL mask.
User Globs, MAC
Address Globs, and
VLAN Globs
Name “globbing” is a way of using a wildcard pattern to expand a single 
element into a list of elements that match the pattern. MSS accepts user 
globs, MAC address globs, and VLAN globs. The order in which globs 
appear in the configuration is important, because once a glob is matched, 
processing stops on the list of globs
User Globs
A user glob is shorthand method for matching an authentication, 
authorization, and accounting (AAA) command to either a single user or 
a set of users. 
A user glob can be up to 80 characters long and cannot contain spaces or 
tabs. The double-asterisk (**) wildcard characters with no delimiter 
characters match all usernames. The single-asterisk (*) wildcard character 
matches any number of characters up to, but not including, a delimiter 
character in the glob. Valid user glob delimiter characters are the at (@) 
sign and the period (.). 
For example, in Table 3, the following globs identify the following users:
Table 3   User Globs
User Glob
User(s) Designated
jose@example.com
User jose at example.com