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Page 106 / 149 Scroll up to view Page 101 - 105
Reference Manual for the Model FR114P, FR114W and FM114P Cable/DSL ProSafe Firewall
9-2
Advanced Configuration
From the Main Menu of the browser interface, under Advanced, click on Dynamic DNS to view
the Dynamic DNS menu shown in
Figure 9-1
:
Figure 9-1.
Dynamic DNS menu
To configure Dynamic DNS:
1.
Access the website of one of the dynamic DNS service providers whose names appear in the
‘Select Service Provider’ box, and register for an account.
For example, for dyndns.org, go to www.dyndns.org.
2.
Select the Use a dynamic DNS service check box.
3.
Select the name of your dynamic DNS Service Provider.
4.
Type the Host Name that your dynamic DNS service provider gave you.
The dynamic DNS service provider may call this the domain name.
5.
Type the User Name for your dynamic DNS account.
6.
Type the Password (or key) for your dynamic DNS account.
7.
If your dynamic DNS provider allows the use of wildcards in resolving your URL, you may
select the Use wildcards check box to activate this feature.
For example, the wildcard feature will cause *.yourhost.dyndns.org to be aliased to the same
IP address as yourhost.dyndns.org
Page 107 / 149
Reference Manual for the Model FR114P, FR114W and FM114P Cable/DSL ProSafe Firewall
Advanced Configuration
9-3
8.
Click Apply to save your configuration.
LAN IP Setup
The LAN IP Setup menu allows configuration of LAN IP services such as DHCP and RIP. From
the Main Menu of the browser interface, under Advanced, click on LAN IP Setup to view the LAN
IP Setup menu, shown in
Figure 9-2
Figure 9-2.
LAN IP Setup Menu
LAN TCP/IP Setup
The firewall is shipped preconfigured to use private IP addresses on the LAN side, and to act.as a
DHCP server. The firewall’s default LAN IP configuration is:
Note:
If your ISP assigns a private WAN IP address (such as 192.168.x.x or 10.x.x.x),
the dynamic DNS service will not work because private addresses will not be routed on
the Internet.
Page 108 / 149
Reference Manual for the Model FR114P, FR114W and FM114P Cable/DSL ProSafe Firewall
9-4
Advanced Configuration
•
LAN IP addresses—192.168.0.1
•
Subnet mask—255.255.255.0
These addresses are part of the IETF-designated private address range for use in private networks,
and should be suitable in most applications. If your network has a requirement to use a different IP
addressing scheme, you can make those changes in this menu.
The LAN IP parameters are:
•
IP Address
This is the LAN IP address of the firewall.
•
IP Subnet Mask
This is the LAN Subnet Mask of the firewall. Combined with the IP address, the IP Subnet
Mask allows a device to know which other addresses are local to it, and which must be reached
through a gateway or router.
•
RIP Direction
RIP (Router Information Protocol) allows a router to exchange routing information with other
routers. The RIP Direction selection controls how the firewall sends and receives RIP packets.
Both is the default.
— When set to Both or Out Only, the firewall will broadcast its routing table periodically.
— When set to Both or In Only, it will incorporate the RIP information that it receives.
— When set to None, it will not send any RIP packets and will ignore any RIP packets
received.
•
RIP Version
This controls the format and the broadcasting method of the RIP packets that the router sends.
(It recognizes both formats when receiving.) By default, this is set for RIP-1.
— RIP-1 is universally supported. RIP-1 is probably adequate for most networks, unless you
have an unusual network setup.
— RIP-2 carries more information. Both RIP-2B and RIP-2M send the routing data in RIP-2
format.
— RIP-2B uses subnet broadcasting.
— RIP-2M uses multicasting...
Note:
If you change the LAN IP address of the firewall while connected through the
browser, you will be disconnected. You must then open a new connection to the new IP
address and log in again.
Page 109 / 149
Reference Manual for the Model FR114P, FR114W and FM114P Cable/DSL ProSafe Firewall
Advanced Configuration
9-5
MTU Size
The normal MTU (Maximum Transmit Unit) value for most Ethernet networks is 1500 Bytes. For
some ISPs, particularly some using PPPoE, you may need to reduce the MTU. This is rarely
required, and should not be done unless you are sure it is necessary for your ISP connection.
Any packets sent through the firewall that are larger than the configured MTU size will be
repackaged into smaller packets to meet the MTU requirement. To change the MTU size:
1.
Under MTU Size, select Custom.
2.
Enter a new size between 64 and 1500.
3.
Click Apply to save the new configuration.
DHCP
By default, the firewall will function as a DHCP (Dynamic Host Configuration Protocol) server,
allowing it to assign IP, DNS server, and default gateway addresses to all computers connected to
the router's LAN. The assigned default gateway address is the LAN address of the firewall. IP
addresses will be assigned to the attached PCs from a pool of addresses specified in this menu.
Each pool address is tested before it is assigned to avoid duplicate addresses on the LAN.
For most applications, the default DHCP and TCP/IP settings of the firewall are satisfactory. See
“IP Configuration by DHCP
” on
page B-10
for an explanation of DHCP and information about
how to assign IP addresses for your network.
Use router as DHCP server
If another device on your network will be the DHCP server, or if you will manually configure the
network settings of all of your computers, clear the ‘Use router as DHCP server’ check box.
Otherwise, leave it checked.
Specify the pool of IP addresses to be assigned by setting the Starting IP Address and Ending IP
Address. These addresses should be part of the same IP address subnet as the firewall’s LAN IP
address. Using the default addressing scheme, you should define a range between 192.168.0.2 and
192.168.0.253, although you may wish to save part of the range for devices with fixed addresses.
The firewall will deliver the following parameters to any LAN device that requests DHCP:
•
An IP Address from the range you have defined
•
Subnet Mask
Page 110 / 149
Reference Manual for the Model FR114P, FR114W and FM114P Cable/DSL ProSafe Firewall
9-6
Advanced Configuration
•
Gateway IP Address (the firewall’s LAN IP address)
•
Primary DNS Server (if you entered a Primary DNS address in the Basic Settings menu;
otherwise, the firewall’s LAN IP address)
•
Secondary DNS Server (if you entered a Secondary DNS address in the Basic Settings menu
Reserved IP adresses
When you specify a reserved IP address for a PC on the LAN, that PC will always receive the
same IP address each time it access the firewall’s DHCP server. Reserved IP addresses should be
assigned to servers that require permanent IP settings.
To reserve an IP address:
1.
Click the Add button.
2.
In the IP Address box, type the IP address to assign to the PC or server.
(choose an IP address from the router’s LAN subnet, such as 192.168.0.X)
3.
Type the MAC Address of the PC or server.
(Tip: If the PC is already present on your network, you can copy its MAC address from the
Attached Devices menu and paste it here.)
4.
Click Apply to enter the reserved address into the table.
Note: The reserved address will not be assigned until the next time the PC contacts the router's
DHCP server. Reboot the PC or access its IP configuration and force a DHCP release and renew.
To edit or delete a reserved address entry:
1.
Click the button next to the reserved address you want to edit or delete.
2.
Click Edit or Delete.
Static Routes
Static Routes provide additional routing information to your firewall. Under normal
circumstances, the firewall has adequate routing information after it has been configured for
Internet access, and you do not need to configure additional static routes. You must configure
static routes only for unusual cases such as multiple routers or multiple IP subnets located on your
network.

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