How To Get Faster Internet Speed for Linux Ubuntu Users

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For Linux Ubuntu users, you can use Tcpdump software to control the data packets traffic which is passing in the network. But you need to download Tcpdump program first.  You can get it from http://www.tcpdump.org.

The other choice is download it automatically through the existing terminal facilities in Ubuntu. On the Terminal screen, please type the command

“sudo apt-get install tcpdump”

To run Tcpdump, make sure that you use the root user.

In order to use this program, is fairly simple. Assume that you want to know the data packets which are passing on an IP on your network, such as on the IP that you want to tap. For example, if you want to tap the packet with IP address 208.110.88.208 with the tcp port 20. Just type the command:

“sudo tcpdump –w test.pcap dst 208.110.88.208 and tcp port 20”.

And for changing the size of data packets, you can use the additional instructions

“-s”

then it will become

“sudo tcpdump –w test.pcap -s dst 208.110.88.208 and tcp port 20”.

So you can control every IP that connects to your network. To review the packets that have been tapped, use the command “sudo tcpdump-w”

List of ports that are often used by Trojan, malware, and worms are:

tcp: 3312, 3412, 3512, 1215, 1315, 4661, 4672, 5555, 4242, 3306, 2323, 6667, 7778, 1863, 6346, 6257, 6699, 4661, 4672, 1214, 6881, 6889.

udp: 4661, 4672, 6881, 6889, 1214, 4661, 4672, 6257, 6699, 6346, 3312, 3412, 3512, 1215, 1315.