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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 »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 »Logging Timestamps
Scenario: “Time ‘r Us’ is a large swiss company selling a wide range of watches. Recently the company was hacked but the company’s security officer traced down the Hacker. Unfortunately the hacker got away because the log files…
Read More »Syslog Server Logging
Scenario: Router MasterMind has a large memory but due to security reasons you want to make sure all logging information isn’t saved locally but dumped to an external syslog server. You don’t want to use the default configuration…
Read More »System Message Logging
Scenario: Two brothers are working as network consultants. One of their customers asked them to implement logging system messages on their routers. There is no central logging server so you need to configure the routers for optimal logging….
Read More »Exec Alias
Scenario: You run a local petshop located in The Netherlands and the network in use has been configured for you. Your colleagues like routers but they are not used to working with the command-line. You decide to help…
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