Abstract: Access to network resources is controlled based on reputation of the network resources. In an embodiment, a data processing apparatus is coupled to a first protected network and to a second network, and comprises logic configured to cause receiving a client request that includes a particular network resource identifier; retrieving, from a database that associates a plurality of network resource indicators with attributes of the network resource identifiers, values of particular attributes that are associated with the particular network resource identifier; determining a reputation score value for the particular network resource identifier based on the particular attributes; and performing a responsive action for the client request based on the reputation score value.

Abstract: Various systems and method are disclosed for disseminating security server contact information in a network. For example, one method (e.g., performed by a security server) involves determining that a network device is a secure network device, in response to participating in a security exchange with the network device; and then sending a server list to the network device. The server list includes the network address of at least one security server. Another method (e.g., performed by a network device) involves initiating an authentication exchange; receiving a server list, which includes the network address of a security server, as part of the authentication exchange; and communicating with the security server by sending a packet to the network address included in the server list.