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Posts published in “VPN”

Install Mac OSX AnyConnect Package on Cisco Router

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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 works fine if he uses it at windows machine. From following screenshot, obviously there is Mac AnyConnect package missing from vpn gateway. Error Messages: “VPNThe AnyConnect package on the secure…

Cisco Router IKEv2 IPSec VPN Configuration

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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 SA. This process supports the main mode and aggressive mode. Main mode uses six ISAKMP messages to establish the IKE SA, but aggressive mode uses only three. Therefore, aggressive mode…

Troubleshooting Cisco IPSec Site to Site VPN – “QM Rejected”

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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 communication. All steps listed here for my future reference. Some other related posts: Troubleshooting Cisco IPSec Site to Site VPN – “reason: Unknown delete reason!” after Phase 1 Completed Troubleshooting…

Renew Cisco IOS IPSec VPN Certificates from Symantec

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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 your ssl certificates once it is expired. Every a couple of years, I have to face this problem,  renewing all routers ssl certificates. As far as I know, you can…

Cisco IOS Router Configuration: IPSec over GRE or GRE over IPSec(1)

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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 IPsec over GRE – Configuration and Explanation (CCIE Notes) The order for IPsec over GRE is IPsec first, GRE second. This order will result in these operations: 1.) Original header…

Cisco Configuration Professional (CCP) Configure IOS SSL VPN (AnyConnect SSL VPN)

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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 VPN on an IOS Router. 1. Confirm SSL-VPN License Installed You can review another post regarding how to add Cisco license into a router. From Command Line: VPN-1#show license detailIndex:…

Troubleshooting Cisco IPSec Site to Site VPN – “reason: Unknown delete reason!” after Phase 1 Completed

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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 troubleshoot IPSec VPN issue: Troubleshooting Cisco IPSec Site to Site VPN – “reason: Unknown delete reason!” after Phase 1 Completed Troubleshooting Cisco IPSec Site to Site VPN – “IPSec policy…

Troubleshooting Cisco IPSec Site to Site VPN – “IPSec policy invalidated proposal with error 32”

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There was vpn set up recently using Cisco Router to connect Check Point firewall. It seems quite simple task but “IPSec policy invalidated proposal with error 32” made me go through all troubleshooting steps which shows below. Other examples to troubleshoot IPSec VPN issue: Troubleshooting Cisco IPSec Site to Site VPN – “reason: Unknown delete reason!” after Phase 1 Completed…

Cisco ASA Remote Access VPN Configuration 2 – AnyConnect VPN

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Basic Cisco AnyConnect full-tunnel SSL VPN uses user authentication by username and password, provides IP address assignment to the client, and uses a basic access control policy. The client also authenticates the ASA with identity certificate-based authentication. Deployment tasks in this post are as follows: Configure the basic ASA SSL VPN gateway features. Configure local user authentication. Configure IPv4/IPv6 address…