iPECS SBG-1000 User Manual

iPECS SBG-1000 User Manual (DATA Features)
64. Malformed packet: Failed parsing – a packet has been blocked because it is malformed.
65. Passive attack on ftp-server: Client attempted to open Server ports – a packet has been
blocked because of an unauthorized attempt to open a server port.
66. FTP port request to 3rd party is forbidden (Possible bounce attack) – a packet has been
blocked because of an unauthorized FTP port request.
67. Firewall Rules were changed – the firewall rule set has been modified.
68. User authentication – a message during login time, including both successful and failed
authentication.
69. First packet is Invalid – first packet in connection failed to pass firewall or NAT.
5.3 Managing Your Bandwidth with Quality of Service
Network-based applications and traffic are growing at a high rate, producing an ever-increasing
demand for bandwidth and network capacity. For obvious reasons, bandwidth and capacity cannot
be expanded infinitely, requiring that bandwidth-demanding services be delivered over existing
infrastructure, without incurring additional, expansive investments.
The next logical means of ensuring optimal use of existing resources are Quality of Service (QoS)
mechanisms for congestion management and avoidance. Quality of Service refers to the capability
of a network device to provide better service to selected network traffic. This is achieved by
shaping the traffic and processing higher priority traffic before lower priority traffic.
As Quality of Service is dependent on the “weakest link in the chain”, failure of but a single
component along the data path to assure priority packet transmission can easily cause a VoIP call
or a Video on Demand (VoD) broadcast to fail miserably. QoS must therefore obviously be
addressed end-to-end.
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