Archive for the 'Cisco' Category

 

 

May 06 2015

How to Deny / Force VLAN Access to a Mac Address on Cisco

Published by under Cisco,Security

Different methods exists to filter out mac addresses on a switch such as:– port security,– mac access lists or even– 802.1x port-based authentication with Radius. Mac access ACL require a higher end switch while 802.1x authentication is a pretty heavy setup and needs to manage a mac address database on a Radius server.Port security allows […]

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Oct 24 2013

Run a DHCP Relay on a Cisco Catalyst 2960 Switch

Published by under Cisco

Having a DHCP relay on a layer 2 switch is usually a nonsense. A DHCP server happened to crash and I had no access to configure a new DHCP service on the ISP router at a remote site.My only option was to set a DHCP relay on the switch that will forward requests to another […]

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Oct 01 2010

Troubleshoot and Monitor Traffic on Cisco PIX/ASA

Published by under Cisco

You are experiencing extremely slow response times, bandwidth is flat-lining or unusually high, or download speeds are down to 0? Here you will find how to troubleshoot traffic going through a Cisco ASA or PIX firewall with the command line.   Access Lists Statistics You’ve most likely configured some access lists to filter the traffic […]

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Dec 14 2009

A Virtual Cisco Router on your Network

Published by under Cisco,Linux

Dynamips and dynagen let you create a virtual Cisco router on a Linux box. It would be even better if that router was reachable from the LAN, wouldn’t it? Going further, that same router could lead us to another couple of virtual routers running in a lab.   Download and Installation Download dynamips and dynagen […]

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May 30 2009

Daily Accounting in Freeradius

Published by under Cisco,Freeradius

We have seen a few posts on Freeradius user list and other forums asking how to collect accounting periodically. The Radius protocol provides accounting but not in the way that many would like. Here’s a short list of things we would like to modify or improve: Traffic is not collected at regular intervalsAs a result, […]

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