Tricks: How to debug a specific IPSec VPN Tunnel on Cisco.

Let’s say you’ve got a router with well over 100 IPSec VPN peers, and you’ve got this one tunnel that just won’t form correctly. Your not sure why and want nothing more than to debug the IPSec process for this one peer but you know if you debug the isakmp or ipsec process your going … Continue reading Tricks: How to debug a specific IPSec VPN Tunnel on Cisco.

IOS 11 Tip. “Turning Off” your Bluetooth or WiFi from Control Panel doesnt really turns it OFF

BAD NEWS: In IOS 11, turning off BLUETOOTH and WIFI doesnt really turn it off in the background. It just disconnects you from your connected bluetooth peers (or wireless networks)   The GOOD NEWS is, there is still away to totally TURN OFF your Bluetooth (and WIFI) to save power. You can do this from … Continue reading IOS 11 Tip. “Turning Off” your Bluetooth or WiFi from Control Panel doesnt really turns it OFF

Restarting VPN Tunnels on Cisco

In some rare cases, VPN Tunnels hang-up randomly and needs to be bounced or restarted to restart the VPN Tunnel negotiate that on some cases the easiest fix on VPN Down issues Check Phase 1 Status of the Tunnel: show crypto ipsec sa Normal/UP status should show: QM_IDLE (More info on Status here) Restarting VPN … Continue reading Restarting VPN Tunnels on Cisco

How to Clear IPSec VPN Remote Peer on Cisco IOS

The following command clears the crypto sessions for a remote IKE peer. You can use context sensitive help ?to find other options. This command will also reset encap/decap counters on the show crytpo ipsec sa peer <PEER_IP_ADDRESS>  output Syntax clear crypto session remote IP_ADDRESS Example: clear crypto session remote 1.1.1.1

Fortinet – Common PCI/Security audit issues

Fortinet – Common PCI/Security audit issues Leave a commentPosted by cjcott01 on December 29, 2016 This is an ongoing blog, and one that I will update often will things that come up in security audits. Companies are always getting external audits to make sure they comply with policies and have no outstanding vulnerabilities with their systems. This is great, … Continue reading Fortinet – Common PCI/Security audit issues

Troubleshooting Cisco VPN Phase 2

Problem It’s been over two years since I wrote Troubleshooting Phase 1 Cisco Site to Site (L2L) VPN Tunnels. I’ve always meant to come back and write the ‘Phase 2’ article but never got around to it. This article is NOT intended to be a ‘fix all” for phase 2 problems, it’s designed to point you in the … Continue reading Troubleshooting Cisco VPN Phase 2

Troubleshooting Cisco VPN Phase 1

Problem Site to Site VPN’s either work faultlessly straight away, or involve head scratching and a call to Cisco TAC, or someone like me to come and take a look. If I’m honest, the simplest and best answer to the problem is “Remove the Tunnel from both ends and put it back again”. Just about every VPN tunnel … Continue reading Troubleshooting Cisco VPN Phase 1

Useful Cisco Site-to-Site VPN Phase 1 and 2 Status Troubleshooting Commands

One way is to display it with the specific peer ip. Check Phase 1 Tunnel ASA#show crypto isakmp sa detail | b [peer IP add] Check Phase 2 Tunnel ASA#show crypto ipsec sa peer [peer IP add] Display the PSK ASA#more system:running-config | b tunnel-group [peer IP add] Display Uptime, etc. ASA#sh vpn-sessiondb detail l2l … Continue reading Useful Cisco Site-to-Site VPN Phase 1 and 2 Status Troubleshooting Commands

Tricks: Unable to access Sonicwall Management Portal? ERR_SSL_VERSION_OR_CIPHER_MISMATCH

Most modern web browser no longer support RC4 encrytion as it is officially declared unsecured by IETF memo RFC7465 published on February 2015. Thus if RC4-Only encryption is enabled in SonicOS, it would block access to the Firewall Management Portal and will display "err_ssl_version_or_cipher_mismatch" error on the browser. Google Chrome and Firefox were among the first ones … Continue reading Tricks: Unable to access Sonicwall Management Portal? ERR_SSL_VERSION_OR_CIPHER_MISMATCH