Services and Facilities

OIT Ethernet Service

OIT Ethernet Service allows University faculty, staff, and students to connect devices to the campus data network via an Ethernet interface. The service is available in practically every building on campus.

OIT VoIP Ethernet Service

OIT VoIP Ethernet Service is used to connect Voice over IP telephone handsets via Ethernet wiring. The service is available in a very small number of buildings.

OIT Static IP Service

OIT Static IP Service provides a static (unchanging) IP address and DNS hostname to your computer when it is attached to OIT Ethernet wiring on its "home network."

OIT Mobile IP Service

OIT Mobile IP Services let you temporarily attach your computer to the campus network in locations other than your "home" location and still receive IP service without reconfiguring your computer or updating its Host Database entry.

Temporary Unregistered Dormnet (TUD) IP Address Service

TUD Service allows devices attached to the Dormnet network but not currently subscribed to Dormnet to have some limited access to campus network. This service is provided for the sole purpose of allowing students to submit Dormnet Subscription forms from their own computers before those computers are receiving normal Dormnet service (because they are not yet subscribed to Dormnet).

Visitor IP (VIP) Service

Visitor IP Service provides Internet service to devices not registered in the Host Database when they are attached via Ethernet to the guestnet network in the guest rooms of Palmer House. (The service is not designed for use outside Palmer House.)

Virtual Private Network Services

OIT provides a Virtual Private Network (VPN) Service for clients that support Microsoft PPTP-based VPNs. VPN service provides a degree of security for traffic crossing the network. It also provides a temporary Princeton University presence, and a temporary Princeton University IP address and hostname to a VPN client, even if the client is connected via the Internet outside the University.

OIT Domain Name Service

A description of the Domain Name Service we provide. Domain Name Service (DNS) provides access to the Internet's distributed database, often used to translate between domain names (e.g. foobar.Princeton.EDU) and IP addresses (e.g. 128.112.252.7).

Network Time Protocol (NTP) Service

A description of the Network Time Protocol (NTP) Service we provide. The Network Time Protocol allows network-attached computing devices to synchronize their time/date clocks automatically.

OIT DHCP and BootP Services

DHCP (the Dynamic Host Configuration Protocol) and BootP (Boot Protocol) allow a network-attached device to learn some of its network configuration information (including its IP address) automatically. DHCP is also used to provide OIT Mobile IP Service, Temporary Unregistered Dormnet (TUD) IP Address Service, Visitor IP (VIP) Service, and Temporary Visitor Wireless Network Access (TVWNA).

OIT Static IP Recycling Facility (SIRF)

The OIT Static IP Recycling Facility (SIRF) locates OIT Static IP Addresses that have been unused for a long time; it recycles these addreses to help conserve them.

External Customer Networks

Describes a network service provided by OIT to some external organizations at the University.

Technical References

Campus Data Network ("Subnet") List

How to determine which Princeton University Campus Data Network (CDN) subnet is available in each building attached to the network. (You may also use this document to determine the subnet's IP network number, IP subnet mask, and IP default router; most people won't need that level of detailed information.)

OIT VoIP Service Network ("subnet") List

This document shows the association between buildings and the subnets that support OIT VoIP Service. These are not the subnets used for the "regular" campus data network.

Default IP Routers, Network Masks, and Broadcast Addresses

How to determine a computer's default IP router (a.k.a "gateway"), network mask (a.k.a. "netmask"), and broadcast address, based on the computer's assigned IP address.

IP Network Ranges at Princeton University

A list of IP network ranges that are part of the Princeton University network.

Princeton Private Network (PPN) VLAN ("subnet") List

Lists each PPN VLAN ("subnet") and a brief description of its intended purpose.

External Customer Network Assignments

A list of IP network ranges, subnet masks, and default routers for all external customer networks provided by OIT.

Traffic Filters on the Campus Network

Summarizes filters that block selected traffic on the campus network, with pointers to more detailed information.

Traffic Filters at the University's Internet Borders

A description of the filters that block selected traffic as it passes through OIT-managed borders between the campus network and the Internet.

Tigernet Rates

A summary of monthly network connection charges for office and classrooms connections; this document is published by OIT Budget and Finance.

Policies and Practices

OIT Network Systems: Device Blocking Policies

An overview of the most common reasons OIT Network Systems block devices from the network, how customers are notified of these blocks, and the timeframe for removing such blocks once the customer has resolved the issue.

Three Strikes Practice for Network Disruptions

OIT's practice for handling customers who inadvertently disrupt or degrade network service repeatedly.

Other Topics

How to Determine Your Device's Ethernet or Wireless Hardware Address

Instructions for determing the Ethernet or Wireless hardware address on some common platforms.

Connecting a Private Network Address Translator to the Campus Network

Describes issues specific to connecting a private Network Address Translator (NAT) to the campus network. Included are caveats and appropriate Host Database registration procedures.

Connecting a Private Ethernet Repeater, Bridge, or Switch to the Campus Network

Describes issues specific to connecting a private repeater, bridge, or switch to the campus network. Included are caveats and appropriate Host Database registration procedures.

The TigerNet Host Charge

Most devices attached to the campus data network are subject to the TigerNet Host Charge; the charge is based upon Host Database records. Dormnet subscriptions are not subject to the TigerNet Host Charge (Dormnet uses a separate subscription fee). The TigerNet Host Charge is waived for network infrastructure, printers, and some other special kinds of devices.