Other Recent Posts

Cisco Pix

Cisco PIX (Private Internet eXchange) is one of the most popular IP firewalls and network address translation (NAT) appliances. The PIX is a firewall appliance based on a hardened, specially built operating system, PIX OS, minimizing possible OS-specific security holes. The PIX runs a custom-written proprietary operating system originally called …

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What To do about SNMP-3-AUTHFAIL Messages

SNMP-3-AUTHFAIL - community string or ACL - which comes first

Have you secured your router with an ACL for SNMP access but are still seeing pages of SNMP-3-AUTHFAIL messages in your logs? In this article we will be dig into this issue and find out exactly what’s going and and why an SNMP-3-AUTHFAIL message might showing up in your logs …

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Book review: Juniper SRX Series

Juniper SRX Series

I met Brad, co-author of “Juniper SRX Series”, a few years ago when I was also working for Juniper Networks. I remember well how active he was in supporting the Juniper community on IDP first (the Intrusion Prevention solution) and SRX (the next-generation firewall family) later. So, when I saw …

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A Certification Does NOT Make You a Network Engineer

Don’t Drink Too Much of the Kool-Aid First let me see a show of hands of how many people know what a vendor certification is? … A vendor certification is created by a computer equipment manufacturer, like a Cisco, Juniper Networks or Microsoft to help train their minions to operate …

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