Cisco Linksys WAG310G, User Manual

Page: 112 / 164

Chapter 8 Access Restrictions
92 3425-00669 Rev E

To use Website Blocking by Regular Expression, enter the expression you
wish to block in the fields provided.
Note : A regular expression is a string used to describe or match a set of
strings. You can block websites that use strings encompassed by the regular
expressions you enter on this screen. Enter each regular expression in a
separate field.
Regular Expression Syntax :
.
any character
^ start of a line
$ end of a line
*
match zero or many times
? match zero or one time
+ match one or more times
{m,n}
match from m to n times (m <= n)
{n} match exactly n times
[a-c]
character set
[^a-c] negative charset
| or
(“ and “) brackets for grouping
\xx escaped character
4 Use any combination of the following options to block services in the Blocked
Services section to filter access to various applications accessed over the Internet,
such as FTP or telnet.

Block a preset applications —The block services select list offers a choice of
preset applications. For multiple selection, press the Ctrl or Shift key.
Note : If you select a preset application, its port numbers and protocol are
displayed and can not be changed.

Block a new service —If the application you want to block is not listed, select
the Service link; then, you can enter the port range and protocol for the
service you wish to block. The new service is added to the list.