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News, Problem Solutions and Other Interesting Information...

Cisco AnyConnect VPN Client: Windows Security Certificate Selection

Posted by Ivan
/ November 8, 2013 / Leave a comment

Recently I deployed Lync 2013 client and soon after I started to receive the following pop-up message: This happened when connecting with my Cisco AnyConnect VPN client on a Windows 7 Enterprise client. I deleted the certificate but it didn’t solve the problem as Lync client recreated it. I did...

Posted in Cisco
Cisco Router 851W: Configuring wireless LAN

Posted by Ivan
/ October 23, 2010 / Leave a comment

While preparing a Cisco Router 851w for a SOHO implementation I run into couple of issues. I tried to configure the router from the http interface but soon I figured out this is not the right way. I configured many switches, routers and access points but never a integrated one...

Posted in Cisco
Cisco: How to reset password of a switch?

Posted by Ivan
/ July 14, 2009 / 4 Comments

Did you ever needed to login on a Cisco Switch and change the configuration? The responsible person is on vacation or out of the office; you forgot the password of the switch and you want to login, and do your job to make the configuration working. Some months ago I...

Posted in Cisco
Cisco: VPN Client 414 connection terminated?

Posted by Ivan
/ July 15, 2008 / 3 Comments

Recently I was troubleshooting a Cisco VPN client issue. Cisco VPN client version 4.0.5 is installed on a Windows XP SP2 client with most recent Windows Security updates. After I installed and configured the VPN client I experienced some problems with it. A GPO was configured to enable the Windows...

Posted in Cisco
Cisco: MT-RJ fiber uplink port switch

Posted by Ivan
/ April 23, 2008 / 2 Comments

If you are managing local area networks that extent the UTP capabilities then most likely some kind of fiber optic connection is installed. Recently I evaluated couple Cisco switches and I ordered one Cisco Switch 2940-8TF for testing. Please make sure to read the product details for ordering the right...

Posted in Cisco
Cisco: how to configure multiple ports on a switch as trunk?

Posted by Ivan
/ April 7, 2008 / 2 Comments

If you are managing Cisco network equipment and switches in particular then you should be aware of the following feature. This feature can save you a lot of time when configuring Cisco switches. In my example I configured 20 ports to be as trunk in a lab environment. Switch1#conf t...

Posted in Cisco, VMWare
Cisco: how to setup Windows PPTP VPN server port forwarding on PIX?

Posted by Ivan
/ March 19, 2008 / 5 Comments

In the following example I am configuring port forwarding to a Windows Server 2003 PPTP VPN server. My lab has been configured as shown in the diagram. I have a /28 network registered on the Internet and 14 public IP Addresses are available though the ISP uplink. The SDSL modem...

Posted in Cisco
Cisco: how to publish Windows 2003 PPTP VPN Server on PIX?

Posted by Ivan
/ January 18, 2008 / 3 Comments

I installed a Windows 2003 PPTP/L2TP VPN server. After the server installation I started testing the communication by creating a VPN connection. The first error I got while connecting was “Disconnected. Error 721: The remote computer did not respond“. The Windows XP client is running as a VMWare virtual machine...

Posted in Cisco
Cisco: How to configure switchport for trunking Hyper-V?

Posted by Ivan
/ January 16, 2008 / 2 Comments

In the following example I installed my Windows Server 2008 Hyper-V server and connected the network uplink connection to the default 1 vlan switchport. I have a separated vlan 2200 for my lab environment. I wanted to test the new feature of enabling the VLAN ID on the new Microsoft’s...

Posted in Cisco, Hyper-V
Cisco: How to enable ICMP packets for a Cisco PIX 501?

Posted by Ivan
/ January 11, 2008 / 8 Comments

Cisco PIX 501 is one of my favorite hardware firewalls to work with. I have couple of them and I am still using these (2011). Most of the time ICMP is disabled on these devices. To enable the ICMP please logon on the console or use SSH connection and run...

Posted in Cisco