ITPRC - TCP/IP

Address Management

FreeIPdb - A freeware tool for managing IP address assignments
Northstar IP Address Tracking System - a system to help track and allocate IP Addresses in an IP Network

DNS

DNS Frequently Asked Questions - FAQ for the comp.protocols.tcp-ip.domains newsgroup.
ProBind - An open souce management application for managing BIND configurations
comp.protocols.tcp-ip.domains - Usenet newsgroup for DNS issues

ENUM

CyberTelecom ENUM -Links to information on ENUM development and government policy
Enum.org - NeuStar ENUM Test Bed and Information
IETF ENUM Working Group - Working group charter and information
ITU ENUM - Activities - News and information from the ITU's ENUM
NetNumber - Industry alliance for the promotion of ENUM
RFC 2916 - ENUM core protocol specification

IANA Address and Port Assignments

ICMP Codes - List of ICMP Type Codes
Internet Multicast Addresses - List of internet multicast address assignments
IP Protocol Numbers - List of next level protocol numbers for protocols that sit on top of IP
Protocol/Number Assignments Directory - IANA's directory of protocol number assignments cataloged by type
TCP/UDP Ports List - Provides descriptive detail for a number of ports
TCP/UDP Well Known Port Numbers - IANA's List of TCP/UDP port number assignments

IP Version 6

6Net Project - Home page for international large-scale IPv6 pilot project
Introduction to IPv6 - Tutorial by OnLamp.com on IPv6
Introduction to IP Version 6 - Microsoft's comprehensive tutorial on IPv6
IPv6 Forum - Industry news and information on IPv6
IPv6 Information Page - Large collection of information about IPv6
IPv6 News and Links - Extensive collection of information on IPv6 (An ITPRC.COM "Link of the Week")
IPv6 Operations Working Group - Home page for IETF "v6OPS" group
IPv6 Style - Tons of news and information on IPv6 development and global deployment
IPv6 Working Group - Home page for IETF IPv6 development activities
IST IPv6 Cluster - Clearinghouse for sharing information on IPv6 projects
LINUX IPv6 Development Project - USAGI's effort to develop an IPv6 stack for LINUX
North American IPv6 Task Force - A group dedicated to promoting IPv6 in North America
Microsoft IPv6 - Information on Microsoft product plans for IPv6 - also includes IPv6 white papers and technology overviews
Next Generation Transition Working Group - Home page of the IETF's working group for IPv6 migration issues

Naming Services (DNS/DHCP/WINS)

Network Address Translation (NAT):

Network Address Translation FAQ - Vicomsoft's guide to address translation
Network Address Translators - Home page of the IETF's nat working group. Also contains papers on Realm Specific IP (rsip)
Network Addresss Translation - Vicom's white paper on NAT fundamentals

TCP/IP Misc.

Internet Software Consortium - Internet software standards organization. Keepers of the DHCP, BIND, and INN standards
IRG Papers - A collection of papers on TCP/IP issues by the Ohio University Internetworking Research Group
Mobile IP Resources - The IEEE Communications Society's list of Mobile IP resources
Networking Research group at the Pittsburgh Supercomputing Center - Collection of TCP/IP tools and research papers
RTP: Overview - Large collection of information on the RTP and RTCP protocols for transmitting real-time data over IP
TimeSync - Provides the latest information on Network Time Protocol (NTP) and other related clock synchronization products. Provides documentation, server lists, and downloads
WhoIs Applet & Servlet, Traceroute Servlet & Protocols - A great collection of TCP/IP tools and reference materials
comp.protocols.tcp-ip - TCP/IP Newsgroup

TCP/IP Tutorials and FAQs

CIDR FAQ - A very detailed tutorial on Classless Inter-domain routing
Daryl's TCP/IP Primer - Tutorial on TCP/IP, Addressing and Subnetting
LearntoSubnet.com - On-Line IP Subnetting tutorials
TCP/IP FAQ - TCP/IP Frequently Asked Questions. Maintained by Mike Oliver and hosted by the ITPRC
TCP/IP Resources - Guide to TCP/IP resources on the web
TCP/IP Sequence Diagrams - Articles which describe TCP/IP and related protocols as sequence diagrams
TCP/IP Tutorial and Technical Overview - An excellent TCP/IP guide, from IBM RedBooks (Registration Required)
Uri Raz's Home Page - Home of the TCP/IP Resource List and the Psuedo TCP/IP FAQ