Problem: After setting up a site to site VPN tunnel on a Cisco ASA firewall, traffic was being dropped with the message “Inbound TCP connection denied from x.x.x.x to x.x.x flags SYN on interface Outside” The traffic inbound on this …
Overview: In this post, we are going to link an Azure Virtual Network to an on-premise network via a Cisco ASA. We will be creating a route-based connection using IKEv2 and a VTI interface. We are also going to focus …
The below details how to recover a Cisco device such as a switch or router if you have forgotten or don’t have the password. You will need physical access to the console port WARNING: By doing this you may loose …
I have recently had some issues connecting to one of our remote Hitahci AMS Storage Array’s using Storage Navigator Modular which by default uses port 2000. I was getting messages such as the below; Failed to connect with the subsystem. …
If when you run show logging or try to view the debug logs on a Cisco IOS device the date and time is not displayed and instead you get something like the below, here is the solution. 6w4d: %ETHCNTR-3-LOOP_BACK_DETECTED: Loop-back …
The ARP table on a Cisco device is a list of learned IP address and what MAC addresses they resolve to, this is required as generally switches work at layer 2 with MAC addresses not IP Address’s. Problem: If you …
Recently I upgraded our Cisco 4402 Wireless LAN Controller to a later release and soon after the upgrade I started noticing the below messages, I am not sure if this started happing because of the upgrade or if I had …
The Problem: I recently had a situation where hosts on my internal LAN needed to communicate with a servers on our DMZ using its public IP address instead of its private address. In my case this was causing issues with …
If you find yourself in ROMMON mode having done something silly like wiping the flash or if there was a problem updating the IOS then the below steps will go through how to copy a replacement image from TFTP to …