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Router Security Configuration Guide
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Version 1.0g
OSPF
Open Shortest Path First an IP routing protocol that uses a
link-state distance metric. OSPF is standardized in RFC
2328. (See also RIP)
Proxy
Any application that acts as an intermediary in the network
exchanges between two applications or services. Proxy
applications are often employed to moderate exchanges
through a firewall.
Proxy-ARP
A facility offered by some routers where a router responds
to ARP queries from a connected LAN on behalf of hosts on
other LANs. Rarely used.
RADIUS
The Remote Authentication Dial-In User Service (RADIUS)
is specified by the IETF RFC 2058. Using RADIUS, access
servers can communicate with a central server to
authenticate, authorize, and audit user activities.
RFC
Request For Comments a document describing an Internet
standard, proposed standard, or information related to or
supports a standard. (See IETF)
RIP
Router Information Protocol a simple inter-gateway
routing protocol that uses hop count as its distance metric.
RIP is standardized by RFCs 1088, 1388, and 1723. (See
also OSPF)
RMON
Remote MONitoring facilities for remote performance and
traffic monitoring of network devices, based on SNMP.
Routing
Direction and management of paths through a multi-segment
network. (See also RIP, OSPF)
RSVP
Resource reSerVation Protocol fairly new standard
protocol for requesting quality-of-service guarantees in IP
networks. RSVP is standardized in RFC 2205.
SMTP
Simple Mail Transfer Protocol a TCP-based protocol for
sending and relaying e-mail messages. SMTP is
standardized in RFC 821.
SNMP
Simple Network Management Protocol datagram protocol
used for monitor ing and configuring network devices.
SNMP uses UDP ports 161 and 162. SNMP is standardized
in RFC 1157 and other RFCs. (See also RMON);
Syslog
A very simple UDP-based protocol used for logging by
Unix systems and Cisco routers. Syslog usually employs
UDP port 514.