NAT Port Forwarding
Scenario: Your network at home has been configured for NAT so you and the rest of your family can access the Internet. You also have a webserver and a SSH server at home and you would like those…
Read More »NAT TCP Load Balancing
Scenario: You are working as a networking trainee and in your pasttime you enjoy troubleshooting networks. Your roommate has a huge website and has bought multiple webservers to host the website. He doesn’t have any more money for…
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…
Read More »RIP Source Validation
Scenario: The year is 2027 and you are working as the network specialist for a museum in Asia. Your colleague has preconfigured a router with RIP before his vacation and it seems he made an error with the…
Read More »RIP Triggered Updates
Scenario: Harry and Sara are network consultants and studying for their CCIE R&S certification. They both have a router and they are running RIP on the serial link to exchange routing information. Their ISP charges them for each…
Read More »RIP Broadcast
Scenario: A small company selling physical security solutions has asked for your help with their network. They own two routers running RIP and it seems the switch in the middle is running amok when it receives multicast traffic….
Read More »RIP Unicast
Scenario: You are the junior network engineer of a company selling Videogames. The company has a small network running RIP between their routers. It seems something is going wrong with RIP multicast traffic. Think you can solve this…
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