Buffer Tuning
Scenario: After a hard day of studying networking you decide to chill out and head for the local gym. As soon as you arrive the owner of the place comes to you and he seems to be upset….
Read More »Telnet Server Tuning
Scenario: You own a company specialized in network and router tuning. One of your customers sells customized cars and uses telnet to work remotely between their two sites. They would like you to tweak their telnet server for…
Read More »Conditional Debug
Scenario: Frank has heard about a feature called “conditional debug” that sounds interesting to him. It seems that you can use this command to only show the output of certain protocols instead of having your screen flooded with…
Read More »TCP Keepalive
Scenario: A well-known science laboratory specialized in researching “portal” technology has a small network running OSPF. One of their terminals is used by a scientist to reach a central server. However every time router Alive crashes it’s impossible…
Read More »Access-List Logging
Scenario: The local boyscout needs your help as a network engineer. They want to make sure everytime their router receives an OSPF packet this will be logged on their local router. Think you can help them out? Goal:…
Read More »WFQ Weighted Fair Queueing
Scenario: Ada and Silver are using the network for a range of applications like FTP, HTTP, TELNET and more. Recently there have been some complaints about slow network performance and it’s up to you to make sure each…
Read More »Configuration Archive to TFTP
Scenario: Recently your company was audited and didn’t pass the security test. One of the complaints was that there is no automated backup mechanism for routers. You decide to configure your network so the routers will copy their…
Read More »Configuration Change Logging
Scenario: You are a student and enrolled in a network engineer program. At the moment you are a trainee at a company that is very suspicious at security. They want you to configure their router so all changes…
Read More »NAT PAT Overload
Scenario: Emma and Alice are in trouble. They just got a new Internet connection but they forgot to mention to the Internet provider that they required two public IP addresses so they both can access the Internet at…
Read More »NAT Dynamic
Scenario: Your friends Jack and Joe recently switched to a new Internet provider and instead of getting a single public IP address they have received multiple global IP addresses. To make sure all global IP addresses are used…
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