Network Troubleshooting

The thing that makes networks awesome is the fact that once you setup a network you’re not done. That may sound like a drawback but it is excellent job security! Engineers or administrators must watch the performance of an organization’s network to make sure that productivity is not affected. Network outages can have a huge effect on an organization, lost revenue and the cost of unproductive employees can severely damage the organization, Earlier this year I also talked about the troubleshooting process which goes hand in hand with network troubleshooting. Continue reading

Advertisements

Cisco Discovery Protocol

In today’s post let’s talk about CDP the Cisco Discovery Protocol. This protocol helps us in two ways, it first helps us verify that a connection between router or switch is set up correctly  at least up to layer two in the OSI model. This also helps us discover Cisco devices that are in are network and which interfaces these devices are connected too and from are Cisco equipment. The Cisco discovery protocol is Cisco proprietary  and before I go any further let me mention that CDP is a security risk because of the detailed information CDP gives out which helps you has a network administrator build a current network infrastructure, this can also hurt you because this information can easily be sniffed by programs that are easily searched on the internet. Continue reading

Configure IPS (Intrusion Prevention System) via SDM

Awhile back I talked about the differences between IPS and IDS. (See the post Cisco IDS vs. IPS ) So for today’s post let’s learn how to configure an IPS (Intrusion Prevention System) on a router using the Cisco SDM (Security Device Manger). The Cisco SDM is a Web-based device management tool a GUI for Cisco routers this can simplify router deployments and cut ownership costs. ( See the post Configure Cisco SDM) Let’s start configuring an IPS with SDM! Continue reading

Configuring Zone Based Firewalls via SDM

Last month I talked about the fundamentals for understanding zone based firewalls (See the post Understanding Zone Based Firewalls). So for today’s post I want to go ahead and talk about configuring the zone based firewalls but with the Cisco SDM (Security Device Manger). The Cisco SDM is a Web-based device management tool a GUI for Cisco routers this can simplify router deployments and reduce ownership costs. (See the post Configure Cisco SDM) Instead of talking about what is zone based firewalls lets jump into the configuration of them. Continue reading

Troubleshooting Process

Today’s post is going to be talking about troubleshooting and where to start the troubleshooting process. Yes there is an actual process that every technician should be aware of. You can also use this troubleshooting process at home, you may not know how to fix it but at least you know where the issue is and find someone who can. Continue reading