Cisco IOS logging with source and destination ports Recently I had to do some troubleshooting on a Cisco 2911 Router in order to find out if traffic is going from a certain IP address to another. So I did the usual created an extended Access List and then applied it to the interface like this:…
Category: Cisco Security
Adding/Configuring a Failover Cisco ASA
These are few notes basically outlining procedures on how to add/configure a Cisco ASA Firewall Failover. There are multiple ways to accomplish this. What I am writing here relates to, Cisco ASA 5520 being used for webvpn, running 8.2(4). Lets say you have two interfaces configured on your Cisco ASA 5520 IP of gi0/0 = 192.168.1.1/24 IP of gi0/1 =…
ASA 8.4 NAT with specific ports
Cisco ASA NAT specific ports TCP/UDP Version 8.4 So we all are pretty much used to the new Cisco ASA 8.3+ NAT, Auto NAT and Twice NAT. I am writing this article on, “how to NAT single or multiple specific ports to a single Public IP address”. When and why would you want to do this? Well some…
Cisco ASA Policy Based Static Source NAT
Setting up VPN Connectivity between multiple locations is a pretty common task these days. It is a very simple and straight forward setup unless NAT comes into the play, there are multiple offices with overlapping subnets etc. Usually in that scenario solution is simple both sides will perform NAT and present their internal network as something else to the other…