Monthly Archives: June 2008

Building IPSec VPN with Juniper Netscreen ScreenOS (CJFV)

A few days ago, I have posted some ScreenOS basics on this blog. Today, it is time to take it one step further and to look at setting up and especially troubleshooting IPSec VPN’s with Juniper Netscreen devices. The need for VPN A VPN can be defined as the simulation of a private connection by […]

Juniper Firewall ScreenOS Basics (CJFV)

ScreenOS Concepts & Terminology The following document is based on ScreenOS v5.4.0r7.0 – Interface = connection to a specific subnet. An interface is assigned an IP address only if firewall is operating in L3 mode. Default interface names can vary on different Netscreen devices. – Zone : logical grouping of subnets and interfaces. All devices […]

Cisco switch IOS cheat sheet

Reset to factory defaults : connect console (9600/8/None/1, no flow control) take out power cable press mode button (at the front), hold it,  and put power cable back switch will go into recovery mode run : flash_init load_helper rename the config file : rename flash:config.txt flash:config.old run : boot When asked to enter the initial […]

Windows 2003 Server Network Load Balancing (NLB) for IIS based SMTP services

In this post, I will explain how to set up 2 or more Windows 2003 servers to use the Windows Server built-in NLB functionalities in order to provide high availability and network load balancing for IIS based SMTP services. Requirements You need to have at least 2 servers that communicate to each other over 2 […]

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