IP Address Policies

All IP addresses used on the University’s networks are to be registered through the IP Man registration tool on the Network Services Intranet site. This site is designed to allow individual IT administrators from any department on campus to maintain the IP ranges assigned to their department. Any IP address in use that is not correctly registered, or causes any interference to the normal operation of the University’s networks or their properly registered devices will be disconnected immediately. Network Services provides several classes of routable IP address subnets on the University’s networks. Public IP addresses in UCF’s assigned 132.170.0.0/16 subnet are to be used exclusively by CS&T for communication between UCF and external entities via Internet, Internet2 and Florida Lambda Rail networks. Private IP subnets starting with 10.171.x.y or 10.173.x.y are routable internally and have access to the Internet via Network Address Translation (NAT) on the University’s border firewalls. Private IP subnets starting with 10.170.x.y, 10.172.x.y, and 10.174.x.y are routable internally and cannot access the Internet, making them ideally suited for printers, cameras, and other appliances. Finally, IP addresses starting with 10.169.x.y are used for subnets that are protected by internal firewalls and are provided with access to University networks and the Internet via NAT. Please refer to the tables and guidelines below when assigning and registering IP addresses to devices on the University’s network.

Private IP Subnets with Internet access via NAT – 10.171.x.y
IP Range Purpose/Utilization
10.171.x.0 Network Address – Unassignable
10.171.x.1 Gateway Address – reserved for Network Services use.
10.171.x.2-10 Router Addresses – reserved for Network Services use.
10.171.x.11-250 Assignable IP space – can be used for systems that require access to the Internet and their associated devices such as computers, servers, printers, etc.
10.171.x.251-254 Testing Addresses – reserved for Network Services use.
10.171.x.255 Broadcast Address – Unassignable

 

Private IP Subnets without Internet access – 10.170.x.y(typically associated with 10.171.x.y subnets)
IP Range Purpose/Utilization
10.170.x.0 Network Address – unassignable
10.170.x.1 Gateway Address – reserved for Network Services use.
10.170.x.2-10 Router Addresses – reserved for Network Services use.
10.170.x.11-250 Assignable IP space – can be used for systems that do not require access to the Internet such as printers, cameras, time clocks, etc.
10.170.x.251-254 Testing Addresses – reserved for Network Services use.
10.170.x.255 Broadcast Address – Unassignable

 

Private IP Subnets with Internet access via NAT – 10.173.x.y
IP Range Purpose/Utilization
10.173.x.0 Network Address – Unassignable
10.173.x.1 Gateway Address – reserved for Network Services use.
10.173.x.2-10 Router Addresses – reserved for Network Services use.
10.173.x.11-250 Assignable IP space – can be used for systems that require access to the Internet and their associated devices such as computers, servers, printers, etc.
10.173.x.251-254 Testing Addresses – reserved for Network Services use.
10.173.x.255 Broadcast Address – Unassignable

 

Private IP Subnets without Internet access – 10.174.x.y(typically associated with 10.173.x.y subnets)
IP Range Purpose/Utilization
10.174.x.0 Network Address – Unassignable
10.174.x.1 Gateway Address – reserved for Network Services use.
10.174.x.2-10 Router Addresses – reserved for Network Services use.
10.174.x.11-250 Assignable IP space – can be used for systems that do not require access to the Internet such as printers, cameras, time clocks, etc.
10.174.x.251-254 Testing Addresses – reserved for Network Services use.
10.174.x.255 Broadcast Address – Unassignable

Assignable IP Space

On a typical 24-bit subnet, the assignable range of IP addresses for computers, servers, printers and other devices will contain the 240 IP addresses from .11 through .250. If additional IP addresses are required, Network Services will coordinate a subnet expansion or additional segmentation of the network to provide the required number of IP addresses.

Reserved IP Space

In general, the first ten IP addresses on any given subnet shall be reserved for routers and gateways. The first IP address available for the user space will be the .11 address.

Testing IP Space

The last four addresses on any given subnet shall be reserved for testing purposes by Computer Services & Telecommunications (CS&T) and should not be assigned to any device in the user space. Testing IPs are typically .251 through .254.