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(Wireless) ADSL VPN Firewall Router with 3DES Accelerator
Chapter 4: Configuration
65
URL Filter
URL (Uniform Resource Locator – e.g. an address in the form of
or
) filter rules allow you to prevent users on your network from
accessing particular websites by their URL. There are no pre-defined URL filter rules; you
can add filter rules to meet your requirements.
Enable/Disable:
To enable or disable URL Filter feature.
Always Block:
Select to always check the URL filter rules (i.e. at all hours of the day).
Block from:
Specify the time period to check the URL filter rules (e.g. during work hours).
Keywords Filtering:
Allows blocking by specific keywords within a particular URL rather
than having to specify a complete URL (e.g. to block any image called “advertisement.gif”).
When enabled, your specified keywords list will be checked to see if any keywords are
present in URLs accessed to determine if the connection attempt should be blocked. Please
note that the URL filter blocks web browser (HTTP) connection attempts using port 80 only.
For example, if the URL is
/abcde.html
, it will be dropped as the keyword “abcde” occurs in
the URL.
Page 72 / 122
(Wireless) ADSL VPN Firewall Router with 3DES Accelerator
Chapter 4: Configuration
66
Domains Filtering:
This function checks the domain name in URLs accessed against your
list of domains to block or allow. If it is matched, the URL request will be sent (Trusted) or
dropped (Forbidden). The checking procedure is:
1. Check the domain in the URL to determine if it is in the trusted list. If yes, the connection
attempt is sent to the remote web server.
2. If not, check if it is listed in the forbidden list, and if present then the connection attempt is
dropped..
3. If the packet does not match either of the above two items, it is sent to the remote web
server.
4. Please be note that the domain only should be specified, not the full URL. For example to
block traffic to
www.sex.com
, enter “sex” or “sex.com” instead of “www.sex.com”. In the
example below, the URL request for
will be sent to the remote web server because it is
listed in the trusted list, whilst the URL request for
www.sex
or
www.sex.com
will be
dropped, because sex.com is in the forbidden list.
Restrict URL Features:
Block Java Applet:
This function can block Web content which including the Java
Applet. It is for preventing someone who wants to damage your system via standard HTTP
protocol.
Block surfing by IP address:
Preventing someone who uses the IP address as URL for
skipping
Domains Filtering
function.
Page 73 / 122
(Wireless) ADSL VPN Firewall Router with 3DES Accelerator
Chapter 4: Configuration
67
Firewall Log
Firewall Log display log information of any unexpected action with your firewall settings.
Check the
Enable
box to activate the logs.
Log information can be seen in the
Status – Event Log
after enabling.
Page 74 / 122
(Wireless) ADSL VPN Firewall Router with 3DES Accelerator
Chapter 4: Configuration
68
VPN (Virtual Private Networks)
Your router support three main types of VPN (Virtual Private Network),
PPTP
,
IPSec
and
L2TP
,
and these are the two major section choices from the menu on the left.
PPTP
There are two types of PPTP VPN supported,
Remote Access
and
LAN-to-LAN
(please
refer below for more information.). Click
Create
to configure a new VPN connection.
Page 75 / 122
(Wireless) ADSL VPN Firewall Router with 3DES Accelerator
Chapter 4: Configuration
69
Remote Access PPTP Connection
Connection Name:
This allows you to identify this particular connection, e.g. “Connection to
office”.
Type:
Check
Dial Out
if you want your router to operate as a client (connecting to a remote
VPN server, e.g. your office server), check
Dial In
operates as a VPN server.
When configuring your router as a Client, enter the remote
Server IP
Address
(or
Hostname)
you wish to connection to.
When configuring your router as a server, enter the
Private IP Address Assigned to
Dial in User
address.
Username:
If you are a Dial-Out user (client), enter the username provided by your Host.
If
you are a Dial-In user (server), enter your own username.
Password:
If you are a Dial-Out user (client), enter the password provided by your Host.
If
you are a Dial-In user (server), enter your own password.
PPP Authentication Type:
Default is
Auto
if you want the router to determine the
authentication type to use, or else manually specify CHAP (Challenge Handshake
Authentication Protocol) or PAP (Password Authentication Protocol) if you know which type
the server is using (when acting as a client), or else the authentication type you want clients
connecting to you to use (when acting as a server). When using PAP, the password is sent
unencrypted, whilst CHAP encrypts the password before sending, and also allows for
challenges at different periods to ensure that the client has not been replaced by an intruder.
Data Encryption:
Data sent over the VPN connection can be encrypted by an MPPE
algorithm. Default is
Auto,
so that this setting is negotiated when establishing a connection,
or else you can manually
Enable
or
Disable
encryption.
Key Length:
The data can be encrypted by MPPE algorithm with 40 bits or 128 bits. Default
is
Auto
, it is negotiated when establishing a connection. 128 bit keys provide stronger
encryption than 40 bit keys.

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