Firewall

Getting Started with the FWSM

·3 min read

Have I talked about the Cisco Firewall Services Module (FWSM) before? It’s a firewall on a module for the 6500 and is based on the PIX firewall. The term “based on” is important …

firewallfwsm

ASA + HSRP/VRRP/GLBP = undef

·2 min read

I use Google Analytics to track the 2 or 3 hits I get a day, and sometimes I see some interesting search terms. Yesterday, some googled up the term “does the ASA 5505 run HSRP”; I think …

asafirewallglbp

DHCP on the ASA 5505

·2 min read

Let’s keep going with our example setup on the ASA 5505 and set up DHCP on this guy. You can set it up to either forward (relay) DHCP requests to a DHCP server somewhere or have it be the DHCP …

asadhcpfirewalllan

Default Route via DHCP on an ASA 5505

·1 min read

I finally got my ASA 5505 up and running at the house, but I ran into a little problem – the box wouldn’t add the DHCP-provided default route into its routing table. That one threw me for …

asafirewall

NAT on a PIX/ASA

·3 min read

NATting sucks and can be confusing. I’m sure everyone agrees to that, but you have to use it at some times. In a PIX/ASA, it’s easy to configure a simple setup, but can be …

aclasafirewallnatpix

Commenting Access-lists

·2 min read

There’s a very-overlooked feature of access-lists – the remark. Yes, this is very basic, but it’s worth mentioning, as it has saved me anguish time and time again. I use remarks to …

aclsasafirewallpix