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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 […]
Free Tool – Exchange 2007 Outbound SMTP gateway redundancy
(a.k.a. PVE Exch2007 Rerouter manual) Keywords : Exchange 2007 outbound SMTP relay redundancy SendConnector outgoing mail high availability Microsoft Exchange 2007 allows you to consolidate your messaging infrastructure and host more users on one server. Combined with the introduction of new server roles, Exchange 2007 allows for high levels of redundancy and resilience, ensuring uptime […]
Outlook and OWA Tips & Tricks
1. Manage Attachment behaviour 1.1. Outlook 2007 Although you probably have deployed an antivirus solution in your messaging infrastructure, by default, Outlook blocks access to certain attachments, even if they have been scanned or not. After all, Outlook doesn’t really know if an attachment has been scanned and is safe for you to open. The […]
Securing Windows Server 2008 and Active Directory
According to Microsoft, Windows Server 2008 is the most secure Windows server version ever. Windows 2008 does include many features that will help increase overall security of the OS, or assist you with securing AD, the network, etc. Most of the features/roles available in Windows 2008 are not being installed in a default installation of […]
Monitoring disk space utilization growth/increase with Operations Manager 2007
By default, Microsoft Operations Manager includes some monitors / rules that have the ability to monitor the disk utilization of system and/or data disks of your servers (and clients). This is a really nice feature, however there may be reasons why this kind of monitoring would still leave you one step behind of your users. […]
System/Disk Backup in Vista using command line script
Microsoft has implemented a really neat feature in Vista Business, Enterprise and Ultimate, allowing you to perform a full disk or even system backup, while the system is running. This new backup tool used Block Level backup and uses Volume Shadow Copy to backup open files (however, it is advised to close your applications while […]
Free tool – PVE SMTP Open Relay Tester
I have decided to make some of my old (and new) tools and scripts available to the community. The first (6 years old but still useful) tool is my SMTP Open Relay Tester. This small standalone Windows console application (no installation, no dll’s) will test if a given smtp server accepts third party relays or […]
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As far as I know, there are no free Management Packs available for monitoring Juniper/Netscreen firewalls with Operations Manager 2007. Catching snmp traps and syslog events seems to be the only “easy”/free way to monitor what is going on on your Juniper devices. The following steps will need to be taken : Prepare the OS […]