Network & Internet Services

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You have successfully connected to the CU-Boulder network.
 
The CU-Boulder campus network registration service is going through a phased upgrade. This upgraded registration service will periodically require reregistration. If you have questions about the new network registration service or the reregistration process, please contact the IT Service Center. Contact information is at the bottom of this page.

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Firewall - Technical Information & Server Registration

CU-Boulder is "closed" network meaning that, by default, traffic is not allowed into the campus network with the following exceptions:

  • IP Security Protocol (IP protocol ID 50, IP protocol ID 51, UDP port 500)

*NOTE: None of these changes impact outgoing Internet traffic (for example, web browsing, connecting to external mail servers, etc) only traffic from the Internet attempting to connect to campus systems is affected.

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Firewall & Server Registration

Overview

The campus border firewall is part of a comprehensive and broad-based OIT security program to protect campus users from malicious online attacks. A firewall is a device or set of devices designed to permit or deny network transmissions based upon a set of rules and is frequently used to protect networks from unauthorized access while permitting legitimate communications to pass.

Campus units that need to provide access to services from the Internet can request an exception; however, departments are strongly encouraged to use the VPN service as an alternative to seeking a border firewall exception.

To most desktop users the firewall does not have an impact on daily operations. An exception would be for those that need to access some on-campus services, such as Windows Remote Desktop, from an off-campus location. In this case, use of a VPN client is necessary to connect to your computer or other campus resource. Learn more about using the campus's VPN client.

Cost

Cost

The firewall is a common-good service provided to the campus. Exceptions can be made at no-cost with the appropriate business or academic justification.

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UCB Wireless - Service Guidelines

Wireless Is Not Intended for Desktop Computers

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Wired Internet - Tips and Tricks

Internet Browsing Problems after Registration

If you're having problems connecting to the Internet after you've registered your computer, make sure you clear your web browser's cache.

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Wired Internet - Configure Your Computer

Overview

Check out the instructions listed below to learn how to configure your computer for our Wired Internet service.

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Wired Internet - 1Gb (GigE) Connections

Overview

By 2013 it is expected that the campus-wide standard will evolve from 100 megabit connections to 1 gigabit (GigE). (GigE is the equivalent of 1 billion bits per second, or 1,000 Mbps.) In the meantime, GigE is provided to those whose work would be impeded without GigE. This typically impacts those conducting research computing or those who do large data transfers.

Who can get it

Who can get it

Faculty and staff whose work would be impeded without GigE.

How to get it

How to get it

Work with your Telecommunication Liaisons and the liaison will submit the request via our online ordering form: Order Ethernet Service Online

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Training & Consulting

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Consultation is available. Contact the IT Service Center and explain that you are interested in GigE service.

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Service Level Commitment (SLC)

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GigE's service level commitment: 2
Learn more about Service Level Commitments.

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Direction

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Roadmaps

Consultation is available. Contact the IT Service Center and explain that you are interested in GigE service.

GigE's service level commitment: 2
Learn more about Service Level Commitments.

Roadmaps

Dynamic DNS

Overview

Dynamic Domain Name Service (dDNS) is available to systems participating in the Campus Active Directory (AD). DDNS allows system administrators to configure their client systems to announce their own chosen name along with the IP address that was assigned to that client by the Dynamic Host Configuration Protocol (DHCP) server. This can facilitate easier management of groups of client systems without needing to use static IP addresses.

Features

Features

Client systems should be on subnets in private IP address space.
 Client systems should be participating in the campus Active Directory.

Benefits

Benefits

DDNS is easy to use and can ease the management of groups of client systems.

Cost

Cost

There is no cost for systems to use dDNS, or DNS. It is simply part of the network campus network infrastructure.

Who can get it

Who can get it

DDNS is available to any client using private IP address space in the campus Active Directory.

How to get it

How to get it

System administrators of groups of clients participating in the campus Active Directory and using private IP address space can use dDNS simply by:

  1. Assigning each client a unique name within the COLORADO.EDU name space.
  2. Using the campus DHCP service for those clients.
  3. 
Check the "Register this connection's addresses in DNS" box on the Network Adapter IPv4 advanced properties in the DNS tab for each client.
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Training & Consulting

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For assistance, contact the IT Service Center.

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Service Level Commitment (SLC)

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Service Level Commitment: 2
Learn more about Service Level Commitments.

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For assistance, contact the IT Service Center.

Service Level Commitment: 2
Learn more about Service Level Commitments.

IP Address and Hostname Management

Overview

OIT assists customers with name and address management by providing Static IP addresses and Dynamic DNS. Learn more about getting a Static IP address below.

About Static IP Address Assignments

Static IP addresses are needed for devices such as printers or servers that need the same IP address all the time.  DHCP (Dynamic Host Configuration Protocol) is the campus standard and should be used for all devices that do not need a static IP address. A Static IP address must be assigned by OIT and it must be manually configured in the device, it is not configured automatically. Static IP addresses are not assigned for UCB Wireless.

Features

Features

Dedicated IP address for your computer, server, printer, or device that does not change.

Who can get it

Who can get it

CU-Boulder faculty and staff.

How to get it

How to get it

  1. Please fill out the Static IP Request Form for any new IP assignments you need. IdentiKey login required.
  2. A confirmation email message will be sent to the address entered below. The actual IP assignment will also be sent to this same address.
  3. If you have any questions, refer to the Help icons that appear next to each field in the form, email hostmaster@colorado.edu, or call 303-735-7575.

Miscellaneous

Online Tools and Resources

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Training & Consulting

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Consutation is available. Please email hostmaster@colorado.edu or call 303-735-7575.

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Service Level Commitment (SLC)

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Service Level Commitment: 2
Learn more about Service Level Commitments.
 

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Consutation is available. Please e-mail hostmaster@colorado.edu or call 303-735-7575.

Service Level Commitment: 2
Learn more about Service Level Commitments.
 

Wired Internet - Network Registration

Overview

In an effort to improve network security, OIT requires periodic registration of computers using DHCP (Dynamic Host Configuration Protocol) on all wireless networks, ResNet networks, and selected wired networks. DHCP allows a device to automatically obtain TCP/IP settings needed to connect to the network. Registration of a computer's network hardware allows CU network managers to notify the computer owner of any network security problems or usage violations. Any devices which use assigned static IP addresses are already registered in the campus DNS database and do not need to be re-registered.

Please Note:

The CU-Boulder campus network registration service is being upgraded. The rollout of the new network registration process is happening in phases across the campus on both the wired and wireless networks. Learn more on the Network Registration project page.

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UCB Guest Wireless - Tips and Tricks

Overview

If you are having difficulty connecting to UCB Guest Wireless or you are experiencing slowness, the following steps may help you.

The wireless signal is weak (or nonexistent)

Know that, although UCB Guest Wireless is almost everywhere on campus, there are areas where the signal is not as strong or doesn't exist. Try moving to another area to see if you can pick up a signal or improve the signal's strength.

My connection is slow

If your connection is slow no matter where you are, try updating your wireless driver. It is highly recommended that everyone periodically check their wireless card vendor's website for driver updates. Download and install new drivers as instructed.

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UCB Guest Wireless - Help

Overview

UCB Guest Wireless allows campus guests quick and easy access to the Internet. Guests simply choose UCB Guest Wireless SSID, open a web browser, agree to Terms and Conditions of Use, and are immediately able to browse the Internet.

To access UCB Guest Wireless:

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UCB Guest Wireless

Overview

UCB Guest Wireless allows campus guests quick and easy access to the Internet. Guests simply choose UCB Guest Wireless SSID, open a web browser, agree to Terms and Conditions of Use, and are immediately able to browse the Internet.

UCB Guest Wireless only provides general Internet use. Guests cannot access CU-Boulder resources that require on-campus connections, such as Library resources and other protected servers and services that are provided strictly for CU-Boulder affiliated students, faculty and staff members.

After 18 hours, guests are required to once again accept Terms and Conditions of Use.

Note: Whenever sensitive data is transmitted on wireless, a VPN should be used for secure data transmission.

Features

Features

  • Wireless access for CU-Boulder visitors that doesn't require an IdentiKey
  • Connections last for 18 hours
Cost

Cost

UCB Guest Wireless is provided as a common-good to the campus which means there is no direct cost to anyone.

How to get it

How to get it

  1. Select UCB Guest as your wireless network.
  2. Open a web browser and go to www.colorado.edu. You will be automatically redirected to a registration page.
    Guest Wireless Registration page
  3. Review the Terms and Conditions of Use.
  4. Click on the Accept button.
  5. You are now free to use UCB Guest Wireless for basic Internet activity for five hours.

Guest Wireless Ports

All common web and VPN traffic is available through UCB Guest Wireless; however, some applications will not be able to connect due to the needed port not being open on UCB Guest Wireless network. The following ports are available:

TCP:

  • Web - 80, 443
  • Secure SMTP - 587
  • Secure IMAP - 993
  • Secure POP - 995
  • SSH - 22
  • FTP - 20, 21
  • VPN (PPTP) - 1723
  • VPN (IKE) - 500
  • VPN (IPSEC) - 4500, 10000

UDP:

  • VPN (IKE) - 500
  • VPN (IPSEC) - 4500, 10000

Protocols:

  • VPN (GRE) - 47
  • VPN (ESP) - 50
  • VPN (AH) - 51
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Training & Consulting

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For assistance, contact the IT Service Center.

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Service Level Commitment (SLC)

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UCB Guest Wireless's Service Level Commitment: 3
Learn more about Service Level Commitments.

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Service Category

For assistance, contact the IT Service Center.

UCB Guest Wireless's Service Level Commitment: 3
Learn more about Service Level Commitments.

Telephone Service

Overview

CU-Boulder personnel, departments, and call centers have access to OIT's telephone service.

Cost

Cost

Review our Networking and Voice Service Rates information.

Who can get it

Who can get it

Telephone service is available for faculty and staff in university buildings and offices.

Students are encouraged to bring a cell phone to campus. Basic land line phone service is not included in room and board for the residence halls and Bear Creek apartments. However, a telephone land line connection can be activated in your room for a non-refundable fee of $500 for the academic year. Contact Occupancy Management (303-492-6673) for requests or questions regarding land line connection activation.

Family Housing residents, except Athens North, have local telephone land line service provided, but residents are required to provide their own telephone handsets.

How to get it

How to get it

Faculty and staff

  • Contact your telecommunications liaison to order telephones, service and accessories.
  • Faculty and staff can pick out the Phones and Accessories they want and then contact their Liaison. Please keep in mind that long-distance authorization codes are not available to faculty and staff for personal use. In these instances, a third-party calling card will need to be obtained.

Telecommunication Liaisons

  1. Go to the Voice/Data Order Form.
  2. Login in with your information and your IdentiKey.
  3. Follow the on-screen menus to add, modify, or remove services.
  4. If you need assistance, call 5-3333.
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Training & Consulting

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For assistance, contact the IT Service Center.

Is this the main service page?

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Service Level Commitment (SLC)

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Service Level Commitment: 1
Learn more about Service Level Commitments.

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Direction

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Roadmaps

Learn more about the networking program direction.

For assistance, contact the IT Service Center.

Service Level Commitment: 1
Learn more about Service Level Commitments.

Roadmaps

Learn more about the networking program direction.

UCB Wireless Network Registration

Overview

After selecting UCB Wireless in your Wireless settings, you will need to open a web browser and register on the network. An IdentiKey is required. If you're a guest to the CU-Boulder campus, check out UCB Guest Wireless.

Please Note:

The CU-Boulder campus network registration service is being upgraded. The rollout of the new network registration process is happening in phases across the campus on both the wired and wireless networks. Learn more on the Network Registration project page.

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