The Network Department

Network Admin Tools & Links

Business Solutions

Tech Notes

Looking Glass:

Check out BGP routes, dampened routes, flap-statistics etc.

Find IP Addresses, Associated with a Host Name:

See what IP addresses are mapped to a given hostname. If a domain name maps to more than one IP addresses, all of them are shown.

Find Your IP Address and Hostname:

Find out what is your machine's IP address and hostname as seen on the Internet.

Traceroute From Princeton:

Traceroute to any IP address from Princeton university or From Around the World

Whois:

Whom does an IP, AS, hostname, etc. belong to in North America. Click here for: Asia/Pacific,

Latin America, Europe, Africa

TLD Country Codes:

Find out country codes for Top Level Domain

DNS, Reverse DNS & more:

Look for DNS and reverse DNS information and more.

Assigned TCP/UDP Ports:

Assigned Port numbers for TCP and UDP protocols.

Assigned Protocols over IP:

Assigned Protocols carried over IP.

RFC:

Get the RFC you need.

Inter-Networking Technologies:

A good introduction to many networking technologies.

dig

Find out A, NS etc. records. Another site.

Network Time Protocol Servers:

This link provides a very good description of NTP protocol and lists several public Stratum 1 and 2 servers

IP Addressing:

This white paper explains IP Addressing the easiest way. Covers VLSM, CIDR and IP Address classes.

TFTP/FTP/Syslog Software:

Get TFTP server, FTP server, Syslog server and other software from this link.