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How does port filtering and access list help provide security?
They prevent specified types of trafic from reaching specified network destination
How do port filtering and access list help provide network security?
They prevent specified types of traffic from reaching specified network destinations.
How an Ethernet switch sends a frame out a single port to a receiver?
The switch learns the MAC address of the device connected to a port during port initialization. It will then send data out the port based upon the destination MAC address as specified the the packet header.
How do you close port a specified port number?
You have to go through your modem (at your modem's IP address, put into your web browser) and it should be somewhat self-explanatory once your in there. Most modems are simplified to be user friendly.
How can you check the service running on specified port on victim machine and here with service want to ask which application using which port not protocol?
I think you virtual, go to ports, open task manager go to application running
Is there a way to configure a cisco switch in order to avoid this kind of attack?
Yes, there should be, but it would vary depending on the security features of the switch port - google "switchport port-security" for examples. Once this is set, the switch won't forward packets to addresses outside of the specified range.
What is a term that is typically used when cable is purchased with internet?
Broadband is the term that is typically used when cable is purchased with internet. To work on the internet on computer, one need to plug in the cable in the computer specified cable port.
What ports need to be open for the client to use the FTP client software?
FTP is a TCP based service exclusively. There is no UDP component to FTP. FTP is an unusual service in that it utilizes two ports, a 'data' port and a 'command' port (also known as the control port). Traditionally these are port 21 for the command port and port 20 for the data port. The confusion begins however, when we find that depending on the mode, the data port is not always on port 20. In active mode FTP the client connects from a random unprivileged port (N > 1023) to the FTP server's command port, port 21. Then, the client starts listening to port N+1 and sends the FTP command PORT N+1 to the FTP server. The server will then connect back to the client's specified data port from its local data port, which is port 20. From the server-side firewall's standpoint, to support active mode FTP the following communication channels need to be opened: * FTP server's port 21 from anywhere (Client initiates connection) * FTP server's port 21 to ports > 1023 (Server responds to client's control port) * FTP server's port 20 to ports > 1023 (Server initiates data connection to client's data port) * FTP server's port 20 from ports > 1023 (Client sends ACKs to server's data port) In order to resolve the issue of the server initiating the connection to the client a different method for FTP connections was developed. This was known as passive mode, or PASV, after the command used by the client to tell the server it is in passive mode. In passive mode FTP the client initiates both connections to the server, solving the problem of firewalls filtering the incoming data port connection to the client from the server. When opening an FTP connection, the client opens two random unprivileged ports locally (N > 1023 and N+1). The first port contacts the server on port 21, but instead of then issuing a PORT command and allowing the server to connect back to its data port, the client will issue the PASV command. The result of this is that the server then opens a random unprivileged port (P > 1023) and sends the PORT P command back to the client. The client then initiates the connection from port N+1 to port P on the server to transfer data. From the server-side firewall's standpoint, to support passive mode FTP the following communication channels need to be opened: * FTP server's port 21 from anywhere (Client initiates connection) * FTP server's port 21 to ports > 1023 (Server responds to client's control port) * FTP server's ports > 1023 from anywhere (Client initiates data connection to random port specified by server) * FTP server's ports > 1023 to remote ports > 1023 (Server sends ACKs (and data) to client's data port)
Specified Combatant Command?
Specified Combatant Command
What is port forwarding?
Port forwarding is when you open a certain path for connections to a machine. For example if i want a program, which uses a port 3306, to be able to connect to my computer from the internet, I need to forward (open) this port first.
What is the meaning of which port is your cargo calling to?
Port from port to port
What is in and out on PC?
An 'in' port is a male port, but a 'out' port is a female port
