Cisco WAG310G Guia do Utilizador descarregar pdf (Página 112)

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

(“ 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.

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Cisco WAG310G Guia do Utilizador Página 112