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Make drawings to understand the topology of firewall implementations

Posted on June 3, 2013 by jimmy — 1 Comment ↓

Every time I see a new implementation of a Cisco ASA firewall I need to know how it is connected. Before doing any changes in the configuration and before answering any answers regarding the functionality of the FW i first…

Tagged with: ASA, documentation, topolog
Posted in Cisco Security

Cisco ASA Anyconnect licensing for dummies, updated!

The picture below should be self-explaining. Click it for a larger version. Edit 2014: There was some errors in the logics around AEA-licenses. The picture below is now corrected. Please do not use the old version (v1.1). Let me explain this. First of all, Advanced Endpoint Assessment (AEA) is a feature where you can do advanced posture checks Continue Reading →

Cisco ASA hairpinning

Cisco Pix/ASA hairpinning The term hairpinning comes from the fact that the traffic comes from one source into a router or similar devices, makes a U-turn and goes back the same way it came. Visualize this and you see something that looks like a hairpin. Hairpinning is only relevant when the firewall is in routed mode since the "turnaround" of Continue Reading →

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Make drawings to understand the topology of firewall implementations

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Make drawings to understand the topology of firewall implementations

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