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Internal IP address
Description
Every computing device that communicates over the Yale University network is assigned a numeric IP address (e.g., 130.132.122.10) that uniquely identifies the device and distinguishes it from other computers on the University Network. This IP address allows communication between devices. Most computing devices on the campus network are given what is know as a 'routable IP' and are directly accessible to the Internet and therefore are at risk from potential malicious activity or attack. An internal IP is considered a 'non-routable' IP. An Internal IP address will allow you access to most resources on the Yale University network, but will strictly limit access to external Internet resources. Listed below are the access issues associated with an Internal IP address.
When should Internal IPs be used?
- If you have a computing device that does not need to be exposed to the Internet (most printers fit in this category).
- If you have a computing device that does not need to interact with other computing devices outside the University network.
- If you have a computing device that contains sensitive data that should be protected from unauthorized exposure. A device with protected health information (PHI) data covered by federal HIPAA regulations would be a good example of instance where an Internal IP is useful.
A 172.21.*.* Internal IP will restrict access to the Internet, but some connectivity will be allowed via proxy services.
A 172.23.*.* Internal IP will be more restrictive and is best used for printers and some devices that will never require Internet access)
Internal IP addresses can access most resources on the Yale University an YNHH network. The computer can join, and share resources in the Active Directory (domain).
Some examples are:
- Oracle Applications
- Web sites like www.yale.edu and www.med.yale.edu(see restrictions below)
- Yale University networked printers
- Email can be sent from Yale University mail servers and received from anywhere on the Internet
- YNHH resources can be accessed using the YNHH VPN
Internal IP addresses cannot:
- Easily gain access to any Internet resource outside the Yale Network.
- Connect to a Yale University departmental network resources if the owners have not modified access to allow for internal IP ranges. Centrally controlled resources have been modified, but if there are departmental systems you can not access you must contact the local system administrator.
Eligibility
On-campus connections
Anyone located in areas that are accessible to the Ethernet network and have a Macintosh or PC-compatible computer that meet ITS standards are eligible to receive network services. Connectivity for departmental LANS is also available.
Off-Campus Connections
Yale University does not offer high-speed Internet access. If you obtain Internet service from one of the outside providers in the area, you will need to customize your computer for access to University restricted resources and services. For further information, please see the off-campus access web page.
Support
ITS provides support for network services including Help Desk services, ID creation/maintenance and desktop technical support. It does not include on-site technical support except for the initial installation and to correct network failures. Each department is assigned to a single team of technicians for service to assure consistency of service and familiarity with client computing needs and environments. Any changes to network services will be posted.
Support Limitations
The following factors may limit support:
- Availability of expertise within the unit (e.g. hardware repair, operating systems)
- Computers that are desktop clones, home PC models or fall below our minimum recommendations
- Problems that cannot be resolved after being escalated to the highest technical level within ITS
- A request whose magnitude jeopardizes our ability to meet the 1-week/24-hour turnaround time commitment
- Support will not be guaranteed on computers that do not meet our minimum standards
Faculty & Staff
Contact your local support provider.
Students
- Central Campus: College Computing Assistants will provide the first line of support. They will attempt to resolve laptop problems and will report network failures or performance issues to ITS Data Network Operations (DNO). DNO will resolve such problems as soon as possible with the caveats that any simultaneous problems with the wired network will take precedence and we may need or want to perform extended testing before returning the network to service.
- Medical Campus: Please see our information for medical campus students regarding NetIDS and connecting to the Yale network.
Order or change service
Faculty & Staff
To order, change, relocate, or remove service:
- START (Central Campus)
- Computing Request Form (Medical Campus)
Students
- Main Campus: Data networking in the Residential Colleges, Old Campus and Graduate Student Housing is maintained by ITS Student Computing.
- Medical Campus: Please see our information for medical campus students regarding NetIDS and connecting to the Yale network.
