Security 401.4 – Secure Communications Day 4 was Crypto day. Brutal for those who are first timers and definitely not a breeze even if you’re a seasoned sysadmin. How many professionals even know the difference between Asymmetric and Symmetric encryption?…
Cisco IPSec VPN tunnels on Cisco IOS routers secures endpoints by forming a tunnel and encrypting the traffic within. Setting up these site to site VPNs can be cumbersome and often involves setting up complicated matching crypto maps on both…
Problem: Have you ever wondered how you logoff or disconnect a remote access VPN user on a Cisco ASA? Well there are two ways to do it. One is to use the GUI – Cisco’s ASDM and the other by…
Problem: Troubleshooting vpn slowness and packet retransmits could be a puzzling task, especially when it’s over an IPsec tunnel. Last week I had the opportunity to troubleshoot a problem with slow website loading times on a webserver across the link….
A site to site IPsec VPN consists of two phases; Phase 1 – IKE exchange and Phase2 – Establishing the ipsec tunnels. It is important to figure out which part of the negotiation the VPN is failing at. However, before…
How often do you get a chance to create new IPsec VPN tunnels? Well today, I got a chance to create 3 customer site to site VPNs at once! Speaking of VPN tunnels, how many know the commands for creating…