Cisco 877W Router

Dec 13 2008   6:27AM GMT

How to configure an interface to default settings in a Cisco Switch or a Cisco Router?

Posted by: Yasir Irfan
Switches, Cisco, Routers, Switching, Routing and Switching, Cisco IOS, Routing, Cisco 2960, Cisco 2950, Cisco 6500, Cisco Tips, Cisco 3560, Cisco 3745, Cisco 3750-E, Router Troubleshooting, Cisco 877W Router, Cisco 6500 Series Catalyst Switch, Cisco 6503, Cisco Catalyst 6503-E Switch, Cisco Catalyst 6506-E Switch, Cisco Catalyst 6509-V-E Switch, Cisco Catalyst 6509-E Switch, Cisco Catalyst 6513 Switch

This is a cool command to erase just the configuration for a particular interface in a Cisco Switch or a Cisco Router.

In the following example we will configure the interface fast Ethernet 0/9  to default configuration

Current Configuration for fast Ethernet 0/9  

ITKE-Cisco#sho running-config interface fastEthernet 0/9

Building configuration…

 

Current configuration : 85 bytes

!

interface FastEthernet0/9

 switchport access vlan 100

 switchport mode access

end

ITKE-Cisco

 

Now we will configure the fast Ethernet 0/9 to default configuration using the following command

“default interface fastEthernet 0/9” 

ITKE-Cisco#configure t

Enter configuration commands, one per line.  End with CNTL/Z.

ITKE-Cisco(config)#default interface fastEthernet 0/9

Interface FastEthernet0/6 set to default configuration

ITKE-Cisco(config)#

 

Running configuration for fast Ethernet 0/9 after configuring to default settings

ITKE-Cisco#sho running-config interface fastEthernet 0/9

Building configuration…

 

Current configuration : 68 bytes

!

interface FastEthernet0/9

 switchport mode dynamic desirable

end

 

ITKE-Cisco#

Sep 14 2008   7:00AM GMT

Learn How to secure your Cisco router with Cisco’s Secure Device Manager (SMD) Firewall Policy Wizard.

Posted by: Yasir Irfan
Networking, Cisco, Routers, SDM, access-lists, Basic Firewall, Cisco IOS Firewall, Cisco Security Device Manager, Cisco 877W Router

This document describes how to use the Cisco Security Device Manager (SDM) to secure your Cisco router. The Cisco Security Device Manager (SDM) firewall policy wizard can help make things easier for the first time users who are not comfortable with the Cisco CLI commands.In this example let’s configure the basic firewall using the Cisco Security Device Manager (SDM) firewall policy wizard. For this example a Cisco 877W router with an IOS version 12.4(4)T8  is used with SDM version 2.5.

Using the Cisco Security Device Manager (SDM) Firewall and ACL task section , you can create new Firewall and ACL.

 

The Cisco Security Device Manager (SDM) offers wizard to create either a Basic Firewall or an Advance Firewall. Now you are thinking what is the difference? The Basic Firewall won’t allow you to configure a DMZ zone where as the advance firewall does.

As we are not interested in creating a DMZ zone lets proceed with a Basic Firewall option as shown in the below figure A

Figure A

Th below figure explains how the basic firewall Configuration Wizard applies its template policy to the inside and outside interfaces. The wizard will give you the opportunity to which interface is which. The new policy will inspect TCP, UDP and other protocols that travel from inside to outside zone. It will block IM, P2P, MSN, Yahoo and AOL  IM traffic. It will also deny any unsolicited traffic coming on to the outside interface Figure B

Click Next, which will take you to the basic firewall Interface Configuration screen, as seen in figure B. This is where you can select which interface will be the inside and which will be the outside.

After you have made your selection, click Next. This takes you to the Basic firewall Security Configuration screen, as shown in figure C. Choose the level of Security for the firewall: High, Medium, or Low.

I choose Medium Security and clicked the preview commands button to review the commands this settings would apply.Figure C

When you see the output, you are pleased as you didn’t have to type all those commands manually

Figure D

Click Next. This takes you to the Basic Firewall Domain Name Server Configuration Screen, as shown in figure D. Specify the primary & secondary DNS server, and click Next. The Firewall Configuration summary screen sums up our choices as shown in figure E. Then click Finish.

Figure E

After successful completion of the above mentioned steps you can always review the changes as shown in figure F by clicking Edit Firewall Policy tab

Figure F