Characterizing the use of 10-space within Chemistry and Physics.

See also

CIT's proxy server's listing of proxied services:

• https://transproxy.cit.cornell.edu:9443/Proxied/
• Question: What is the proxy service being used by RedRover/ eduroam, if different? And if different, what services are be proxied?

Used primarily for two reasons:

1. Easy, powerful protection

Easy protection for devices not needing a public IP but benefiting from being on Cornell's network.

• Simpler and more bomb-proof network protection than a firewall.
• Computers still get:
  
  1. network access to group file shares.
  2. patching.
  3. Network-based anti-virus reporting.
• Printing from RedRover/ eduroam, which is not normally allowed in, is enabled by opening port 9100.
  • No VPN required.

On occasion the device may need a public IP temporarily. Such a change requires modifying the DNSDB record.

• This is usually simpler and faster than making changes to CU's ACLs or firewall services.

Use cases in Chemistry

As of Jan. 12, 2016:

• All (100%) of Chemistry and Physics networked printers: 129
  
  • 87 of those are on Research networks.
• Many, many computers hooked up to instrument systems and most servers: 74
  • 49 of those are on Research networks.

For context. other numbers:

• Public IPs for all Chemistry and Physics systems: 260*
  • Count does not include Physics Grad lab, with 61 public IPs assigned.
• Systems on "zero" space: 22

2. Optimizes use of limited IP space

Affords twice the number of IPs on a network than if 10-space numbers were converted to public IP addresses (and presumably similarly blocked at the network layer via firewall or ACL).

Caution: Ensure CU's proxy server configured with necessary off-campus access

• Cornell's private network (10-space)

Source info in Chemistry IT

Excel file called "DNSDB 10-space counts 1-12-16" located:

• R:\Chem IT\Infrastructure\Networking