Category: Configuration Example
Configuration Example, Firewalling
Secure Copy Server Cisco ASA
Lately there are a lot of changes in the firmware and the ASDM for the Cisco ASA firewalls. This means a lot of copying from files to the flash memory of the specific appliances. Normally when upgrading the software from an appliance I use a computer on the customer network. This could be my own … Read More
Configuration Example, Proxy, Security
Change password through LDAPS on ISA server
Today I received the question about allowing users to changes his/her password through webmail, whereby webmail is published via an ISA server 2006 reverse proxy. This is possible, but it requires the configuration of LDAPS to authenticate users. I started by configuring a Certificate Authority (CA) on a member server in the domain. During the … Read More
Configuration Example, Routing, Security, Switching
Secure HSRP configuration
A friend of mine works for a well known auditing and penetration testing company in the Netherlands. Recently we were talking about how he starts looking for flaws in network infrastructures. My friend told me that the first thing he does is simply starting WireShark and start looking at all the packets he receives. By … Read More
Auto Backup Configurations
Till recently I didn’t have a decent way to backup configurations from routers and switches without using some kind of management tool, like Cacti or Nagios. I wanted to automatically backup configurations by only using a TFTP or FTP server on a network. I started looking and found the solution by using the archive and … Read More
Configuration Example, Security, Switching
Layer 2 security
I attended the session layer 2 security, because I had some discussions about layer 2 security with one of my colleagues. We were discussing about using layer 2 security and especially implementing it in the environments from our customers. Looking at my/our customers, I don’t see environments where layer 2 threats would be immediate. But … Read More
Configuration Example, Routing
Policy-Based Routing Catalyst 3560
Today I visited a customer where the power a Cisco Catalyst 3548XL blew up. The switch had a manufacture date of December 2000. It is an old one, but still I haven’t seen a power supply being blown up from a Cisco switch from that age. But oké, the switch needed to be replaced. The … Read More