Password recovery – Cisco 1841 Router

Password recovery on Cisco Router – config register This is just a quick post for my reference on how to do password recovery on a Cisco Router. Recently I had to do it on a Cisco 1841. Here are my steps: Boot up the router with a console cable and then from terminal emulation software… Continue Reading Password recovery – Cisco 1841 Router

Cisco IOS ACL logging with Port numbers

Cisco IOS logging with source and destination ports Recently I had to do some troubleshooting on a Cisco 2911 Router in order to find out if traffic is going from a certain IP address to another. So I did the usual created an extended Access List and then applied it to the interface like this:… Continue Reading Cisco IOS ACL logging with Port numbers

IP NAT Outside

IP NAT Outside NAT – Network Address Translation, at times can be a complicated process depending on what you are trying to do and how it gets configured on a Cisco Router vs Cisco ASA’s is a bit different as well. This post is about recent NAT – Network Address Translation on a Cisco Router… Continue Reading IP NAT Outside

Basics of HSRP on a Cisco Router

Basic configuration steps for HSRP (Hot Standby Router Protocol) In this post I am going to go over some HSRP – Hot Standby Router Protocol options and basic configuration steps. HSRP – Hot Standby Router Protocol in simple terms makes two Cisco routers with two different IP addresses look like one. You would need at least three (3) IP addresses to configure HSRP –… Continue Reading Basics of HSRP on a Cisco Router

Cisco 881 IOS Router basic configuration with Dynamic WAN IP

Just finished configuring a Cisco 881 IOS Router with Comcast and Dynamic IP address. Sharing my configuration experience and steps for the Cisco router. Requirement: I just needed the Cisco 881 Router connected to the Comcast modem so that computers connected to the Cisco 881 router can access the network and the Internet. Picture below shows you the connectivity diagram for my local network. Keeping the above connectivity requirements I configured the Cisco 881 Router like… Continue Reading Cisco 881 IOS Router basic configuration with Dynamic WAN IP

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