Network Administration

Networking

Permitting Ping: ICMP Exceptions

When Windows Firewall first appeared in XP SP2, I started getting odd questions on email. They all went something like, "Hey, something's weird on my system now that I'm running SP2. I've got two computers, A and B. A can ping B, but B can't ping A. What's going on?"...

Eight daily steps to a more secure network

While many companies have a 9-to-5 security staff, hackers don't punch a clock. However, your network can still remain secure in the 16 hours in-between - you just need to focus activities to provide maximum coverage for the network....

What you need to know about OSPF

As I mentioned in the "What you need to know about EIGRP" article, EIGRP and Open Shortest Path First (OSPF) are the two most popular routing protocols for today's midsize and large companies—both offer a huge breadth of features that can cover just about any routing scenario such companies would...

What you need to know about EIGRP

When it comes to internal routing protocols, the two most popular in use today at midsize and large companies are Enhanced Interior Gateway Routing Protocol (EIGRP) and Open Shortest Path First (OSPF). Both of these routing protocols offer a huge breadth of features that can cover just about any routing...

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