FAQs

What can I do with Colasoft Capsa?

A:
  Network administrators: Diagnose network problems, detect the PC infected virus, monitor network traffic, analyze network protocol, detect network vulnerability.
Company administrators: View the accesses of http browse, ensure email security, against unauthorized access to the sever.
Security managers: Supervise the contents transmitted in network, analyze nonnormal traffic, network security complement.
  Consultants: Analyze network troubleshoots, solve network problems for customers, optimize network capability.
  Network application developers: Debug network applications, optimize program capability, test the content sent/received, examine network protocols.

What is a filter?

A: In Colasoft Capsa, a filter is a rule or set of rules that separates captured data and performs a particular action based upon your instructions. The filters decrease the packets to be analyzed and displayed, enabling you to focus on what you are really interested in. Colasoft Capsa has two kinds of filters: global filters and project filters. Global filters are some commonly used protocols filters, which can be applied to the current project. Project filters are only applied to the current project.

Can Colasoft Capsa analyze the traffic occupation in the network?

A: Colasoft Capsa provides users detailed statistics information of the whole network or a specific subnet, MAC/IP address or protocol, including total traffic, traffic each second, average traffic and etc, and shows these information in the Endpoints view and Protocols view.

Our LAN is connected with a hub, but I can only detect my own traffic.

A: Generally, if a NIC supports promiscuous mode it can work well with Colasoft Capsa, a possible reason is your hub actually acts as a switch though labeled as a hub (e.g. Linksys hubs). Another possible reason is you are using a multi-speed hub, in which case you can't see the traffic from the stations operating at the speed that is different from your NIC's speed (e.g. if you have a 10 Mbit NIC, you can't see the traffic generated by 100 Mbit NICs).

Does Colasoft Capsa enable me as a network administrator to easily see who is listening to the radio and downloading music online?

A: Yes. The standard ports for media protocols are: RTSP - port 554 PNM - port 7070 (also known as PNA port) MMS - port 1755 By setting port filters in the "Project Settings - Filter" dialog you can easily find out who is visiting media resources; to monitor the downloads of media files (e.g. .rm), you can set a URL filter for HTTP analysis in the "Project Settings - Advanced Analyzer" dialog.

After I entered the serial number and license key, they didn't work.

A: Please copy and paste the serial number and licence key you received from us to the fields required, it may include unnecessary blank or input error if you type in the numbers.

Is there a way to keep an area of the graph on screen so I can save that section of the graph that is important to me?

A: Yes. To show graph history, click the "Pause" button from the toolbar to pause refreshing the view (just the display stops refreshing, the collection for graphic data still continues), then you can scroll to any section of the graph and save it as .bmp, .png and .emf file; when you click "Pause" again, the "Graph" view will resume to show the latest statistic data.

Why all the packets I see have a bad checksum?

A: Many GB adapters have the checksum offload parameters enabled by default. When this feature enabled, an adapter performs the cycle-intensive process of calculating CRC, the Windows TCP/IP stack does not calculate the IP and TCP checksums but leaves them as 0x0000. Colasoft Capsa collects the copy of each outgoing packet before it goes to the adapter, that is the reason why the checksum showed as bad. We have reproduced this issue on Intel Pro/1000 cards, but probably it may also occur on other adapters. To fix this issue, you need to disable the adapter's Offload Transmit IP Checksum and Offload Transmit TCP Checksum feature in the advanced setting dialog.

We keep updating more FAQs on our official website, please visit Colasoft.com to learn more.

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