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

DNS resolution over IPsec/SSL VPN on Fortigate

Description This article provides basic troubleshooting to follow when you are not able to access hostname over IPSec VPN tunnel or SSLVPN connection Solution   If you are not able to access resources across VPN tunnel by hostname, check following steps: (1)  Make sure to set DNS server properly when configuring SSL or IPsec VPN.  … Continue reading DNS resolution over IPsec/SSL VPN on Fortigate

Tricks: Steps to Fix the Cisco VPN 412 Error

Cisco VPN Error 412 for Legacy VPN Client v5.0.0.07   Reason 412. The remote peer is no longer responding". Means that the software VPN Client detected that the VPN server is not responding anymore and deleted the connection. It can be anything from IPSEC traffic being blocked by your upstream device, NAT Issues or simply misconfigured VPN Settings: Once … Continue reading Tricks: Steps to Fix the Cisco VPN 412 Error

Tricks: Cisco VPN on Windows 8.1 or Windows 10 – Reason 442: Failed to enable Virtual Adapter

Problem: Error when connecting to VPN Error Message: Reason 442: Failed to enable Virtual Adapter If you receive this error on Windows 8.1 or Windows 10 while trying to connect with the Cisco VPN Client then the solution is a simple registry fix. To fix: Click Start and type regedit in the Search field and hit enter. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CVirtA Find the String … Continue reading Tricks: Cisco VPN on Windows 8.1 or Windows 10 – Reason 442: Failed to enable Virtual Adapter