How to Monitor Internet Traffic with Packet Sniffer

Internet traffic is the flow of data around the Internet. It includes web traffic, which is the amount of that data that is related to the World Wide Web, along with the traffic from other major uses of the Internet, such as electronic mail and peer-to-peer networks.

In case we want to monitor internet traffic generated or is generating in LAN, here is a detailed process how we can do it with Colasoft Packet Sniffer – Capsa.

Again we must make sure the packet sniffer software is correctly implemented so we can capture all the traffic in LAN, if you don’t know how to do it, please make sure you read how to implement a packet sniffer.

First let’s launch a new project with Colasoft Packet Sniffer, then do some online activities, such as chatting, browsing a website, sending and receiving emails, downloading some files. All these activities will generate different kinds of internet traffic. We may keep the project running to continuously monitor internet traffic or stop the project to do some analysis.

To monitor internet traffic, we’d better first select the “Internet Addresses” in the “Explorer” on the left window:

We can see that all the internet addresses are listed by countries, to monitor internet traffic of a specific country, we just need click on it; If we want to monitor internet traffic of a specific IP address within one country, we need to expand the country node and select the IP address in it.

Also we can monitor internet traffic aggregated or internet traffic in real-time

To view what online activities have generated or are generating internet traffic, we need to use the “Protocols” Tab.

We can see there are protocols which separately stand for different internet activities:

HTTP – Website browsing

MSN – online chatting with Live Messenger

POP3 – Email

HTTPS - Website browsing via a secure link

QQ- online chatting with QQ

DNS – Domain Name System

About Capsa

Colasoft Capsa is a network analyzer (packet sniffer or protocol analyzer) designed for network monitoring and troubleshooting. It performs packet capturing, network monitoring, protocol analyzing, packet decoding, and automatic diagnosing. By giving users insights into all of network's operations, Capsa makes it easy to isolate and solve network problems, identify network bottleneck and bandwidth use, and detect network vulnerabilities. Learn more about Capsa, please visit http://www.colasoft.com/capsa/

What Can Hackers Do with a Packet Sniffer

What Can Hackers Do with a Packet Sniffer?

A packet sniffer in the wrong hands is a deadly weapon. A packet sniffer is a real danger because it is a very powerful and difficult to detect tool

Security breaches of all kinds are reported all the time. Everyday we hear of hackers who managed to steal sensitive data, of people who become victims of identity theft, etc. Very often the breaches are so incredible that you wonder if hackers have supernatural powers. Well, hackers hardly have supernatural powers but they don't need them –supernatural powers are not necessary when a networklacks security and one has the right tools to break in.

Hackers Can Monitor Networks With a Packet Sniffer

The tools hackers use to break into networks are more or less the same tools network admins use to monitor and maintain their network with. For example, packet sniffers are among the tools hackers love most. A packet sniffer captures packets and shows you their contents.This means that with the help of a packet sniffer running somewhere into the network, hackers can monitor all the unencrypted traffic to and from this network.

This is really scary – just imagine a malicious hacker who knows all the secrets of your company. It gets even more dangerous for networks, where hubs (and not switches) are used because in this case a packet sniffer can be installed on any computer and the hacker will monitor all the traffic in that segment, not only the traffic to and from the host. The good news is that hubs are almost out of use today and because of that hackers can do less damage with a packet sniffer.

Hackers Can Obtain Passwords and Credit Card Numbers With a Packet Sniffer

When a hacker uses a packet sniffer to monitor your network, this is not nice but when he or she steals passwords, credit card numbers and other types of sensitive data, this is a real danger. Unencrypted passwords, credit card numbers and other sensitive data are an easy target for a hacker with a packet sniffer.

In many of the cases of mass theft of credit card numbers and passwords happen because hackers use a packet sniffer on an unencrypted network. For truth's sake, it is important to mention that even if all the traffic is encrypted, there are still many other ways to obtain sensitive data. But when the traffic over a network is not encrypted and nobody monitors the network for unauthorized packet sniffers, sooner or later data will be stolen.

One of the greatest achievements for hackers with a packet sniffer is to capture the administrator's password. When the administrator's password is transmitted over the network in an unencrypted form, this is an easy target for hackers. If hackers manage to intercept the admin password, they have the power to do everything they want to on your network – delete data, modify data, etc. So, do you see why hackers don't need supernatural powers but only the admin password?

About Colasoft

Ever since 2001, Colasoft has been an innovative provider of all-in-one and easy-to-use network analyzer software for network administrators and IT managers to monitor network activities, analyze network performance, enhance network security, and troubleshoot network problems. Up to now, more than 5000 customers in over 70 countries trust the flagship product – Capsa as their network monitoring and troubleshooting solution. Colasoft also offers four free network utilities: Colasoft Packet Builder, Colasoft Packet Player, Colasoft MAC Scanner, and Colasoft Ping Tool. Learn more about Colasoft and its solutions, please visit http://www.colasoft.com/.