Use Cloudflare Argo Tunnel to Expose Internal Web Application to Internet
It is a great tool if you need to expose your internal web application to Internet. Fast, easy, and most important, it is free. Here is the Announcement from Cloudflare…
How to Solve SSL VPN and Web Firewall Issues
VPN systems are classified as virtual private networks that do not need a physical connection, allowing users to directly connect and access the device on private networks. Security agencies such…
Create VPN Tunnel Between CheckPoint FIrewall and WatchGuard FireBox Firewall
This post describes how to configure a Branch Office VPN (BOVPN) between WatchGuard Firebox on Prem and a Check Point device at my home which is behind my home router.…
Install Mac OSX AnyConnect Package on Cisco Router and on Mac Machine
Symptoms: One of my clients reported a Cisco AnyConnect issue. It only happened to his machine and later we found that is because he is using Mac machine. His credential…
Expose your local service to public: Ngrok, FRP, localtunnel
For many IT workers remotely involved with networking, it is quite common to need to expose your Intranet application to the outside world in a secured manner. Unfortunately, we work…
CISCO ASA VPN Tips and Tricks
1. Clear VPN Configuration： clear configure crypto map VPN_AAAA 2. Debug and show commands: Enable logging: ciscoasa#terminal monitor ciscoasa(config)# logging buffer-size 1048576 ciscoasa(config)# logging buffered 7 ciscoasa(config)# logging monitor 7…
Cisco Router IKEv2 IPSec VPN Configuration
What is Differences between IKEv1 and IKE v2? 1. Different negotiation processes − IKEv1 IKEv1 SA negotiation consists of two phases. IKEv1 phase 1 negotiation aims to establish the IKE…
Troubleshooting Cisco IPSec Site to Site VPN – “QM Rejected”
There was a VPN issue to troubleshoot recently. It was between Juniper SRX and Cisco Router. It seems straightforward but it took quite a long time to troubleshoot because of…
Renew Cisco IOS IPSec VPN Certificates from Symantec
I am not sure if there is other better way to do it. There is no good documentation from Cisco or somewhere else regarding how you should do on renewing…
Cisco IOS Router Configuration: IPSec over GRE or GRE over IPSec(1)
IPSec over GRE means Outer Header is GRE. In other words, IPSec is riding over GRE. Please refer: Chapter: Point-to-Point GRE over IPSec Design and Implementation IPSEC over GRE Tunnel…
Cisco Configuration Professional (CCP) Configure IOS SSL VPN (AnyConnect SSL VPN)
Basic Cisco Configuration Professional (CCP) configuration has been posted before at following link: Cisco CCP Installation and Basic Configuration This Post will demonstrate how to use CCP to configure SSL…
Troubleshooting Cisco IPSec Site to Site VPN – “reason: Unknown delete reason!” after Phase 1 Completed
It is always not easy when troubleshooting a vpn issue. You will meet many situations. Here is one of examples I used to meet during configuring ipsec vpn.Other examples to…