This appendix lists the acronyms and abbreviations used in this document. Refer to Chapter 5, "Command Reference" for information on the commands described in this section.
| Acronym | Description |
|---|---|
ARP | Address Resolution Protocol---a low-level TCP/IP protocol that maps a node's hardware address (called a "MAC" address) to its IP address. Defined in RFC 826. An example hardware address is 00:00:a6:00:01:ba. (The first three groups specify the manufacturer, the rest identify the host's motherboard.) |
BGP | Border Gateway Protocol---while PIX Firewall does not support use of this protocol, you can set the routers on either side of the PIX Firewall to use RIP between them and then run BGP on the rest of the network before the routers. |
BOOTP | Bootstrap Protocol---lets diskless workstations boot over the network and is described in RFC 951 and RFC 1542. You can set access to this feature with the outbound and conduit commands. |
chargen | Character Generation---via TCP, a service that sends a continual stream of characters until stopped by the client. Via UDP, the server sends a random number of characters each time the client sends a datagram. Defined in RFC 864. |
conn | Connection slot in PIX Firewall---refer to the xlate command page for more information. |
DNS | Domain Name System---operates over UDP unless zone file access over TCP is required. You can permit or deny access to this feature with the conduit and outbound commands. |
EGP | Exterior Gateway Protocol---while PIX Firewall does not support use of this protocol, you can set the routers on either side of the PIX Firewall to use RIP between them and then run EGP on the rest of the network before the routers. |
Enhanced Interior Gateway Routing Protocol---while PIX Firewall does not support use of this protocol, you can set the routers on either side of the PIX Firewall to use RIP between them and then run EIGRP on the rest of the network before the routers. | |
ESP | Encapsulated Security Protocol. Refer to RFC 1827 for more information. |
FDDI | Fiber Distributed Data Interface---Fiber optic interface. |
FTP | File Transfer Protocol---you can permit or deny access to this feature with the aaa, conduit, and outbound commands. |
gaddr | Global address---an address set with the global and static commands. |
GRE | Generic Routing Encapsulation protocol---commonly used with Microsoft's implementation of PPTP. You can set access to this feature with the conduit command. |
HSRP | Hot-Standby Routing Protocol. |
HTTP | Hypertext Transfer Protocol---the service that handles access to the World Wide Web. |
IANA | Internet Assigned Number Authority---assigns all port and protocol numbers for use on the Internet. You can view port numbers at: |
ICMP | Internet Control Message Protocol---this protocol is commonly used with the ping command. You can view ICMP traces through the PIX Firewall with the debug trace on command. Conduits can be pinged, but statics cannot. If an internal host needs to be pinged, you can provide this access with the conduit command by opening a port just for ICMP. Refer to RFC 792 for more information. |
IGMP | Internet Group Management Protocol. |
IGRP | Interior Gateway Routing Protocol. |
IP | Internet Protocol. |
IPinIP | IP-in-IP encapsulation protocol. |
IPSec | IP Security efforts in the IETF (Internet Engineering Task Force). |
IRC | Internet Relay Chat protocol---the protocol that lets users access chat rooms. You can permit or deny access to this service with the outbound and conduit commands. |
laddr | Local address---the address of a host on a protected interface. |
MD5 | Message Digest 5---an encryption standard employed in the link command for encrypting Private Link packets. This same encryption is used with the aaa authentication [any|telnet] console tacacs+|radius command to encrypt Telnet sessions to the console. |
MIB | Management Information Base---used with SNMP. |
MTU | maximum transmission unit---the maximum number of bytes in a packet that can flow efficiently across the network with best response time. For Ethernet, the default MTU is 1500 bytes, but each network can have different values, with serial connections having the smallest values. The MTU is described in RFC 1191. |
NAT | Network Address Translation. |
NIC | Network Information Center. |
NNTP | Network News Transfer Protocol---news reader service. You can permit or deny access to this service with the outbound and conduit commands. |
NOS | Network Operating System. |
NTP | Network Time Protocol---set system clocks via the network. You can permit or deny access to this service with the outbound and conduit commands. |
OSPF | Open Shortest Path First protocol. |
PIX | Private Internet Exchange. |
PAT | Port Address Translation. |
POP | Post Office Protocol. |
PPTP | Point-to-Point Tunneling Protocol. |
RADIUS | Remote Authentication Dial-In User Service---user authentication server specified with the radius-server command. |
RFC | Request For Comment---RFCs are the defacto standards of networking protocols. |
RIP | Routing Information Protocol. |
RPC | Remote Procedure Call---you can permit or deny access to this service with the outbound and conduit commands. |
SMTP | Simple Mail Transfer Protocol---mail service. You can permit or deny access to this service with the conduit and the fixup protocol smtp 25 command. The fixup protocol smtp command enables the Mail Guard feature. The PIX Firewall Mail Guard feature is compliant with both the RFC 1651 EHLO and RFC 821 section 4.5.1 commands. |
SNMP | Simple Network Management Protocol---set attributes with the snmp-server command. |
SQL*Net | SQL*Net is a protocol Oracle uses to communicate between client and server processes. (SQL stands for Structured Query Language.) The protocol consists of different packet types that PIX Firewall handles to make the data stream appear consistent to the Oracle applications on either side of the firewall. SQL*Net is enabled with the fixup protocol sqlnet command, which is provided in the default configuration. You can also specify access to SQL*Net with the outbound and conduit commands. Refer to the outbound/apply command page for more information on the outbound command. |
SYN | Synchronize sequence numbers flag in the TCP header. |
TACACS+ | Terminal Access Controller Access Control System Plus. |
TCP | Transmission Control Protocol. Refer to RFC 793 for more information. |
TFTP | Trivial File Transfer Protocol. |
uauth | User authentication. |
UDP | User Datagram Protocol. |
VPN | Virtual Private Network. |
WWW | World Wide Web. |
XDMCP | X Display Manager Control Protocol. |
xlate | Translation slot in PIX Firewall. |