Many security programs have agent components that report security information back to a central reporting platform. These probes are usually attempts to map IP address space as the hacker looks for security holes that might be exploited to compromise system security.Īgent A computer program that reports information to another computer or allows another computer access to the local system. In general, FTP user agents use active mode and Web user agents use passive mode.Īctivity light An LED (light-emitting diode) that shines when a piece of hardware is working, communicating with the network, and transmitting data.Īddress learning A method by which switches and routers determine the unique address number for each device on a network, enabling accurate transmission to and from each node.Īddress space probe An intrusion technique in which a hacker sequentially scans IP addresses, generally as the information-gathering prelude to an attack.
In passive mode, the client establishes the connection. In active mode, the FTP server establishes the data connection. The device stops any traffic coming from IP addresses or ports not on the ACL.Īctive mode FTP (File Transfer Protocol) One of two ways an FTP data connection is made. Access control is often accomplished by creating a list specifying the IP addresses and/or ports from which permitted traffic can come. Most modern Ethernets are migrating to 100BaseT, which is ten times faster than 10BaseT.ĪCL ( Access Control List) A method of keeping in check the Internet traffic that attempts to flow through a given hub, router, firewall, or similar device. For example, the maximum distance a hub can be from a workstation in 10BaseT is 325 feet if using twisted pair cables, but 3,000 feet if using fiber optic cable. 10BaseT Ethernet imposes differing limitations, depending on what type of physical wire is being used and how many stations are attached to the network. # | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | R | S | T | U | V | W | X | All # 10BaseT 100BaseT An Ethernet specification that can handle up to 10 mega bits of data per second.
This glossary contains a list of terms, abbreviations, and acronyms frequently used when discussing networks, security, firewalls, and WatchGuard products.
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