For IT Pros: This page contains information about IP address ranges used by the University of Illinois System.
These IP ranges are used on the campus network in Urbana-Champaign. Note: if you are a network or system administrator wishing to allow access from all such systems, please also consider the next two groups of IP ranges (used by System-wide shared services and NCSA).
Many services shared by the entire University of Illinois System, including payroll, Banner, Exchange, and Lync, use these IP ranges.
The following groups of IP ranges are used by other parts of the U of I System.
ICCN (the Inter-Campus Communications Network) carries information between all University of Illinois System campuses and connects to other Big Ten universities.
The Internet Assigned Numbers Authority (IANA) has reserved several IP ranges for use on private networks within an organization; this private IP space can be used by anyone, but may never be routed on the public Internet (i.e. outside of the U of I System). RFC 1918 establishes three private IP address ranges: 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16.
Currently, computers in the 172.16.0.0/13 (Urbana-Champaign) and 172.24.0.0/13 (NCSA) private IP ranges can only reach (and be reached by) other computers within the IP ranges for Urbana-Champaign, System-wide shared services, and NCSA.
Departments wishing to use Private IP space on the Urbana-Champaign campus network are requested to follow these conventions:
Specific IP ranges used by various services for connecting mobile and remote users in Urbana-Champaign can be found in accessnets.txt
IllinoisNet Private: 10.192.0.0/14 IllinoisNet Public NAT: 126.96.36.199/24 # General Access Nets Private: 172.16.0.0/15 IllinoisNet_Guest Private: 172.16.128.0/17 IllinoisNet_Devices Private: 172.16.96.0/19 Eduroam Private: 172.16.0.0/18 Guest/Device Nets Public NAT: 188.8.131.52/24 # # for VPN nets "duo" in the pool name indicates dedicated 2FA # IP ranges # vpn pool1: 184.108.40.206/22 vpn pool2: 220.127.116.11/23 vpn pool3: 18.104.22.168/22 vpn pool4: 10.250.0.0/15 vpn nat pool: 22.214.171.124/25 vpn ipv6 pool1: 2620:0:e00:4024::/64 vpn ipv6 pool2: 2620:0:e00:4034::/64 vpn ipv6 pool3: 2620:0:e00:400f::/64 vpn ipv6 pool4: 2620:0:e00:403b::/64 vpn duo pool1: 126.96.36.199/25 vpn duo pool2: 188.8.131.52/25 vpn duo pool3: 10.251.128.0/17 vpn duo nat pool: 184.108.40.206/25 vpn duo ipv6 pool1: 2620:0:e00:402a::/64 vpn duo ipv6 pool2: 2620:0:e00:4035::/64 vpn duo ipv6 pool3: 2620:0:e00:4037::/64 vpn duo ipv6 pool4: 2620:0:e00:403c::/64