- Cisco Vpn For Mac Download
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- Cisco Vpn Client For Mac
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I use multiple VPN clients, depending on which customer I am supporting on which day. I regularly use the Cisco VPN Client, the Cisco AnyConnect VPN Client, and the built-in Native Cisco VPN Support on my Mac (I’m currently running Snow Leopard version 10.6.8.) However, a recent customer project led me to install the Shrew Soft VPN Client they supported so that I could access their network through their Netscreen firewall. (This client is a free IPsec client distributed under open source license, to get it to work in the Mac I needed to also install the LGPL Qt Framework and a TUN/TAP driver, but that is another story…)
Some time later, I found out that after installing the Shrew Soft Client, neither the Cisco VPN Client nor the built-in Native Cisco VPN Support would work on my Mac. The AnyConnect VPN Client still worked fine. Obviously it was time for some troubleshooting.
Background
As a first step, I rebooted my Mac, but the Cisco VPN Client was still unhappy – it could not initialize the IKE ports. From the VPN Client Log file I saw messages such as:
As a first step, I rebooted my Mac, but the Cisco VPN Client was still unhappy – it could not initialize the IKE ports. From the VPN Client Log file I saw messages such as:
The console messages for the built-in Cisco VPN support were not as detailed, but also indicated an issue:
(On the Mac, you can find console messages using the console.app via Applications > Utilities > Console )
Connecting to the IT Services VPN service using the inbuilt VPN client Once you have configured a network interface on your Mac to connect to the IT Services VPN service you can make a VPN connection whenever you need to. Threats can occur through a variety of attack vectors. You need secure connectivity and always-on protection for your endpoints. Deploy Cisco endpoint security clients on Mac, PC, Linux, or mobile devices to give your employees protection on wired, wireless, or VPN. Mac OS X 10.11.4 - The VPN client was unable to successfully verify the IP forwarding table modifications. Just upgraded my Mac to OS X 10.11.4 Beta (15E27e). Running Cisco AnyConnect Secure Mobility Client version 4.1.08005.
The EOL designation for the Cisco VPN Client v5.0.07.0440—the most recent and stable version—means that newer operating systems, like Windows 10, are not officially supported by the client.
Ok, I removed the Shrew Soft VPN Client, the LGPL Qt Framework, and the TUN/TAP driver. I still got the same messages. Rebooted. I got the same messages. I removed and reloaded the Cisco VPN Client software. I got the same messages. Rebooted. I got the same messages.
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Partial Work-around
I did find a partial work-around – if I added “UseLegacyIKEPort=0” at the end of the .pcf files, I could get the Cisco VPN Client to connect. However, I still had issues with the built-in Native Cisco VPN Support.
I did find a partial work-around – if I added “UseLegacyIKEPort=0” at the end of the .pcf files, I could get the Cisco VPN Client to connect. However, I still had issues with the built-in Native Cisco VPN Support.
Releasing Port 500
I decided that I really needed to release whatever was binding port 500 that IKE/ISAKMP was trying to use. Something was not completely cleaned out from my removal of the Shrew Soft VPN Client. I did try asking the IT Support desk for one of my customers (hey, I was having issues with the VPN to them), as well as the official Apple Support number about how to determine what program was binding a port, and how to release it. I got a couple hints from them, but also did a bunch of Google searches. Other folks had run into a similar binding issue, so I tried to put together the pieces.
I decided that I really needed to release whatever was binding port 500 that IKE/ISAKMP was trying to use. Something was not completely cleaned out from my removal of the Shrew Soft VPN Client. I did try asking the IT Support desk for one of my customers (hey, I was having issues with the VPN to them), as well as the official Apple Support number about how to determine what program was binding a port, and how to release it. I got a couple hints from them, but also did a bunch of Google searches. Other folks had run into a similar binding issue, so I tried to put together the pieces.
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By the way, Port 500 is mapped to ISAKMP by default on the Mac, you can see that based on the /etc/services file:
What worked for me to find the process using port 500 was a “list open files” command, and then kill the process with super user priviledges:
Oracle database gui sql tools. After I killed the iked process, I was able to run the Cisco VPN Client, and the built-in Native Cisco VPN Support.
Permanently Removing the Binding
If you recall, the problem persisted even when I rebooted the Mac previously. So the iked daemon was being called during the start up process. I needed to find and remove this daemon call as well. I started looking for likely processes in startup directories and found it pretty quickly:
If you recall, the problem persisted even when I rebooted the Mac previously. So the iked daemon was being called during the start up process. I needed to find and remove this daemon call as well. I started looking for likely processes in startup directories and found it pretty quickly:
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I rebooted my Mac, and success! My three regularly used VPN clients (the Cisco VPN Client, the Cisco AnyConnect VPN Client, and the built-in Native Cisco VPN Support) all worked. If required, I am pretty sure I could re-install the Shrew Soft VPN Client, and manually kill the iked daemon as needed if I wanted to run other VPN clients.
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I hope this explanation may help others with Cisco VPN Client issues.
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