How to capture filtered packets in Wireshark?

What is filter IP address?

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What is the IP address? The Internet Protocol is a method of communication on the Internet. A computer, also known as a client, is connected to the Internet through a device known as a router. The IP address of the computer is also known as its address. The Internet Protocol is an addressing protocol for the Internet. It enables a client to send and receive data to other computers.

How does the IP address work? IP addresses of the computers are separated into three parts: network address, host address and port number. Network address identifies the network of the device. The host address indicates the device. Port number indicates the port on which the device is listening.

Let's see how these three parts work. Let's say, the address of my computer is 192.168.10.

The first part of the IP address is 192. 1 is the network address. This means that it belongs to the local area network. The local area network is a subnet of the Internet. It is a group of computers. Each device has a unique IP address and it works in the same way as any other device.

Next part is 168. 168 is the host address.

How to monitor IP address in Wireshark?

I have a server, which has two ip addresses as below.

When I try to monitor this using wireshark, I get two separate sets of traces with the same traffic. If you see the screengrab below, the first time the request comes in, it comes via one address, and then it comes back via a different one. Is it possible to see how many client ip addresses are connected at a certain time frame to the server?

If your question is How to see number of connections coming from particular IP address(s), then Wireshark is not the tool for that. Wireshark works on packet level and it does not even have any such feature. Even if you will filter packets on base of the source IP address, it is nothing but just simple filtering on IP address.

If your question is How to see number of connections happening at a particular time frame, then Wireshark is not going to give you accurate results either. It will show traffic only when it is being sent or received. But you can certainly look at the data for the entire time frame of you have captured it. The answer is "Capture data for the time you want to see the result."

Can you elaborate a little more on what "doesn't work" you are referring to? A single capture file can contain a lot of traffic during the timeframe in question, so how do you know it's not capturing everything? Are you trying to find out the source IP addresses that were using your server at a certain time frame? daboudSep 20 '12 at 21:48. In a LAN connection, it takes time for a connection between hosts to establish itself. In a wire-line connection (cable/DSL) it takes less time and there is almost no delay. So I assumed that its a DSL connection. Also how do you know that the first time when a packet was received (if the host sent a SYN request to the server) it was addressed to different IP address? The server should use the same IP address always since it uses different TCP ports (ie different services).

KrulAug 24 '12 at 21:53. @Krul You have a valid point. I'm not aware of a particular way to see the count of connections made by different IP addresses through the server.

How to capture filtered packets in Wireshark?

I am using Wireshark to analyze some packets captured from the network.

The packets are filtered, and I can see them in the filtered list. How do I capture them?
Is there any way to save these packets to a file, or is there a command to display these packets? Thanks. I think you'll want to go into "File->New->Capture" and choose your filter (if you're looking for something specific) and then check the box next to "Save As". You'll get a file in the current directory with whatever name you gave to "Save as".