Configuring Networking

Configuring Routing

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•

Metric—The distance to the target (usually counted in hops).

•

Ref—Number of references to this route.

•

Use—Count of lookups for the route. Depending on the use of -F and -C, this

is either route cache misses (-F) or hits (-C).

•

Interface—Interface to which packets for this route will be sent.

•

Type—Type of routing used (RIP or static).

Configuring Static Routes

You can configure static routes to direct packets to the destination network. A

static route is a pre-determined pathway that a packet must travel to reach a

specific host or network. Some ISPs require static routes to build your routing

table instead of using dynamic routing protocols. Static routes do not require CPU

resources to exchange routing information with a peer router. You can also use

static routes to reach peer routers that do not support dynamic routing protocols.

Static routes can be used together with dynamic routes. Be careful not to

introduce routing loops in your network.

To create a static route:

STEP 1

Select Networking > Routing > Static Routes.

STEP

2

In the Static Route Table, click Add.

STEP

3

In the Route Name field, enter the name of the route.

STEP

4

If a route is to be immediately active, check the Active check box. When a route is

added in an inactive state, it will be listed in the routing table, but will not be used

by the firewall. The route can be enabled later. This feature is useful if the network

that the route connects to is not available when you added the route. When the

network becomes available, the route can be enabled.

STEP

5

Check the Private check box to mark this route as private, which means that it will

not be shared in a Routing Information Protocol (RIP) broadcast or multicast.

Uncheck this box if the route can be shared with other firewalls when RIP is

enabled.

STEP

6

In the Destination IP Address field, enter the IP address of the destination host or

network to which the route leads. For a standard Class C IP domain, the network

address is the first three fields of the Destination LAN IP; the last field should be

zero.

Configuring Networking

Configuring Routing

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STEP

7

In the IP Subnet Mask field, enter the IPv4 Subnet Mask for the destination host or

network. For Class C IP domains, the Subnet Mask is 255.255.255.0.

STEP

8

From the Interface drop-down menu, choose the physical network interface

through which this route is accessible (WAN or LAN).

STEP

9

In the Gateway IP Address field, enter the IP Address of the gateway through

which the destination host or network can be reached. If this firewall is used to

connect your network to the Internet, then your gateway IP is the firewall's IP

address. If you have another router handling your network's Internet connection,

enter the IP address of that router instead.

STEP 10

In the Metric field, enter a value between 2 and 15 to define the priority of the

route. If multiple routes to the same destination exist, the route with the lowest

metric is chosen.

STEP 11

Click Save.

Configuring Dynamic Routing

RIP (Routing Information Protocol, RFC 2453) is an Interior Gateway Protocol (IGP)

that is commonly used in internal networks. It allows the Cisco RV120W to

exchange its routing information automatically with other routers, and allows it to

dynamically adjust its routing tables and adapt to changes in the network.

NOTE

RIP is disabled by default on the Cisco RV120W.

To configure dynamic routing:

STEP 1

Choose Networking > Routing > Dynamic Routing.

STEP

2

To configure how the firewall sends and receives RIP packets, choose the RIP

direction:

•

None—The firewall neither broadcasts its route table nor does it accept any

RIP packets from other routers. This option disables RIP.

•

In Only—The firewall accepts RIP information from other router, but does

not broadcast its routing table.

Configuring Networking

Configuring Routing

Cisco RV120W Administration Guide

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•

Out Only—The firewall broadcasts its routing table periodically but does

not accept RIP information from other routers.

•

Both—The firewall both broadcasts its routing table and also processes RIP

information received from other routers.

STEP

3

Choose the RIP version:

•

Disabled.

•

RIP-1—This is a class-based routing version that does not include subnet

information. RIP-1 is the most commonly supported version.

•

RIP-2B—This version broadcasts data in the entire subnet.

•

RIP-2M—This version sends data to multicast addresses.

STEP

4

RIP v2 authentication forces authentication of RIP packets before routes are

exchanged with other routers. It acts as a security feature because routes are

exchanged only with trusted routers in the network. RIP authentication is disabled

by default. You can enter two key parameters so that routes can be exchanged

with multiple routers present in the network. The second key also acts as a failsafe

when authorization with first key fails.

To enable authentication for RIP-2B or RIP-2M, check the Enable box. (You must

also choose the direction as explained in Step 2.)

If you enabled RIP v2 authentication, enter the following first and second key

parameters:

•

MD5 Key ID—Input the unique MD-5 key ID used to create the

Authentication Data for this RIP v2 message.

•

MD5 Auth Key—Input the auth key for this MD5 key, the auth key that is

encrypted and sent along with the RIP-V2 message.

•

Not Valid Before—Enter the start date when the auth key is valid for

authentication.

•

Not Valid After—Enter the end date when the auth key is valid for

authentication.

STEP

5

Click Save.

Configuring Networking

Configuring Port Management

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Configuring Port Management

The Cisco RV120W has four LAN ports. You can enable or disable ports, configure

if the port is half- or full-duplex, and set the port speed.

To configure LAN ports:

STEP 1

Choose Networking > Port Management.

STEP

2

In the Port Management Setting Table, to enable a port, check the Enable box. To

disable the port, uncheck the Enable box. By default, all ports are enabled.

STEP

3

Check the Auto Negotiation box to let the firewall and network determine the

optimal port settings. By default, automatic mode is enabled. This setting is

available only when the Enable box is checked.

STEP

4

Check the Flow Control box to enable flow control.

STEP

5

(Optional) Choose either half- or full-duplex based on the port support. The default

is full-duplex for all ports. This setting is available only when the Auto check box is

unchecked.

STEP

6

(Optional) Select one of the following port speeds: 10 Mbps or 100 Mbps. The

default setting is 100 Mbps for all ports. This setting is available only when the

Auto check box is unchecked. You can change the port speed if a network is

designed to run at a particular speed, such as 10 Mbps mode. In this case, the

endpoint also uses 10 Mbps mode either by auto-negotiation or manual setting.

STEP

7

Click Save.

Configuring Dynamic DNS (DDNS)

DDNS is an Internet service that allows routers with varying public IP addresses to

be located using Internet domain names. To use DDNS, you must set up an account

with a DDNS provider such as DynDNS.com or TZO.com.

The firewall will notify dynamic DNS servers of changes in the WAN IP address, so

that any public services on your network can be accessed by using the domain

name.

Configuring Networking

Configuring Dynamic DNS (DDNS)

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To configure DDNS:

STEP 1

Choose Networking > Dynamic DNS.

STEP

2

Select the Dynamic DNS Service you are using. Selecting None disables this

service.

STEP

3

If you selected DynDNS.com:

a.

Specify the complete Host Name and Domain Name for the DDNS service.

b.

Enter the DynDNS account username.

c.

Enter the password for the DynDNS account.

d.

Check the Use Wildcards box to enable the wildcards feature, which allows all

subdomains of your DynDNS Host Name to share the same public IP as the

Host Name. This option can be enabled here if not done on the DynDNS Web

site.

e.

In the Update Period field, enter the number of hours before the Cisco RV120W

updates the host information on DynDNS.com.

If you selected TZO.com:

a.

Specify the complete Host Name and Domain Name for the DDNS service.

b.

Enter the user e-mail address for the TZO account.

c.

Enter the user key for the TZO account.

d.

In the Update Period field, enter the number of hours before the Cisco RV120W

updates the host information on TZO.com.

STEP

4

Click Save.