Archive for March, 2013

Forcing DHCP Renewal via Batch File using Pstools

March 10th, 2013 No comments

The challenge was to obtain all user IP addresses in order to locate them on the local LAN (i.e. to locate their switch port by checking arp caches and mac address-table entries in the usual manner).  Once located I needed to place them into a different vlan and then have the user reboot to obtain a new IP address.  How could I accomplish this remotely and by “stealth”.  Read more…

Categories: Network Management Tags:

Cisco ASA – Initial Configuration

March 9th, 2013 No comments

This post describes the tasks required for a basic configuration of the Cisco ASA.  Please note that he smaller Cisco ASA 5505 has an 8-port 10/100 switch which operates at Layer 2 only. So you can not configure the physical ports as Layer 3 routed ports, you need to create VLAN interfaces. By default, interface Ethernet0/0 is assigned to VLAN 2 and it’s the outside (internet-facing or untrusted)interface.  The remaining seven interfaces (Ethernet0/1 to 0/7) are assigned to VLAN 1 Read more…

Categories: CISCO, Security Tags:

BGP Regular Expressions

March 3rd, 2013 No comments

| Expression | Meaning |
| .* | Anything |
| ^$ | Locally originated routes |
| ^100_ | Learned from AS 100 |
| _100$ | Originated in AS 100 |
| _100_ | Any instance of AS 100 |
| ^[0-9]+$ | Directly connected ASes |
Read more…

Categories: CISCO Tags: