Once you have started tcpdump on a command line, re-create the issue you are seeing before stopping tcpdump, note the exact time of the re-create, and then provide the output file. You need to be logged in as an admin or root user to use tcpdump.

IBM Support lets you know whether there is a specific host and port needed for packet capture. Meanwhile, if you want to only collect traffic going to or from a particular hostname and port you can use a command such as: The -w argument directs the raw packets to a cap file so that you can provide the capture to IBM Support. To collect a packet capture by using tcpdump, use a command such as: We would advise that you use tcpdump as this should already be installed on all standard Linux distributions. For details on using Wireshark, see the section 'On Windows'. Choose your device below.To collect a packet capture on Linux you can either use tcpdump, which is already included in most Linux distributions or by installing Wireshark. To find out what adjustments you should make, check out our quick tutorials on improving speed on all devices. If you notice that speed is slower than usual, you can make some minor adjustments to improve it. These factors might affect the speed even we do not apply any speed or bandwidth limits and keep our servers regularly monitored to maintain optimal performance. The distance between you and the server.However, other factors come into play as well, such as: Usually, internet speed is not highly affected. This usually results in a slightly decreased connection speed, as the data has to be processed, and encrypted. However, when you use a VPN, one additional stop along the way is added in the traffic flow, which means that the data goes through a VPN server twice, once on its way out of your device, and once coming back.

When you connect to the internet without a VPN, all of your traffic flows from your device to the final destination and then back to you. In this article, you will learn about the possible speed issues you may encounter and how to deal with them on different devices.

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