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 on an premise network via a Cisco ASA. We will be creating a route based connection using IKEv2 and a VTI interface. We are also going …
I recently started to trial Zabbix 3.4 as a network monitoring solution, so far I really like it. Monitoring my Cisco LAN worked out the box using the built in template “Template Net Cisco IOS SNMPv2”, however this template would …
Problem: I recently had to use some none Cisco 10Gbs copper SFP’s in a 3850 stack. On inserting the SFP’s the interfaces went into err-disabled status and looking in the log I was getting the message “Warning: SFP gbic-security check …
Have you ever looked at a comms cabinet run of Cisco switches only to find that ever interface is patched, some of them have no link lights and you don’t know which ones can be unpatched. The below steps are …
Become a subnetting Jedi and have fun at the same time! A collection of fun games to help perfect your subnetting and binary skills. Either pick a skill you want to focus on or play in shuffle mode. This is …
The below details how to recover a Cisco router if you have forgotten the password of there is a problem with the configuration. WARNING: By doing this you may loose any configuration on the router. 1. You will need to …
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 though how to copy a replacement image from TFTP to …
