We have a VPN configured through a Cisco ASA 5505. We are getting hammered by some IP addresses that appear to be located in China and would like to put a stop to this. I have a little bit of a ...

The term “spoofing” is generally regarded as slang, but refers to the act of fooling — that is, presenting a false truth in a credible way. There are several different types of spoofing that occur, ...

The vast majority of administrators go to great lengths to protect the files on their network. Typically, elaborate firewalls are used to keep outsiders away from file servers. The files residing on ...

Knowledge of the structure of Internet Protocol (IP) packets is a fundamental part of understanding the Internet and how information moves from one point to another. The benefits of such knowledge ...

Packet queues are a core component of any network stack or device. They allow for asynchronous modules to communicate, increase performance and have the side effect of impacting latency. This article ...

I'v got a relatively new ASUS n56u router. I turned on logging of dropped packets the other day and notice that a couple times a minute there are dropped packets being logged from IP addresses I don't ...

Take advantage of TCP/IP options to optimize data transmission Your email has been sent By Alex Kuznetsov, Alex Plant, and Alexander Tormasov Last time, we explained how the TCP_CORK option can ...

In the context of IP networks, the phrase “quality of service” (QoS) has a specific meaning, describing the quality of the network with regard to the following: These are all particularly important ...