Difference: DNS (1 vs. 2)

Revision 22014-09-25 - WilliamSeligman

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META TOPICPARENT	name="Networks"

DNS servers for the Nevis particle-physics groups

A DNS resolver or server is a system that's queried to translate an IP name (like mail.nevis.columbia.edu) into an IP address (like 129.236.252.8). For the most part, you don't have to worry about this; the DNS servers have been configured for you on the Linux cluster systems, and laptops automatically pick up this information via DHCP. If you have a system (e.g., a computerized oscilloscope) for which it's useful to manually configure the DNS servers, here are the details.

Changed:

<
< For a system on the public networks, a good set of DNS resolvers is:

>
> For a system on the public network, a good set of DNS resolvers is:

129.236.252.7
129.236.252.29

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This list is our secondary DNS server, our primary DNS server, and the main CU DNS server to act as backup.

Changed:

<
< For a system on the private networks, use:

>
> For a system on the private network, use:

10.44.7.7
10.44.7.29

Revision 12012-10-17 - WilliamSeligman

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Added:

>
>

META TOPICPARENT	name="Networks"

DNS servers for the Nevis particle-physics groups

For a system on the public networks, a good set of DNS resolvers is:

129.236.252.7
129.236.252.29
128.59.1.3

This list is our secondary DNS server, our primary DNS server, and the main CU DNS server to act as backup.

For a system on the private networks, use:

10.44.7.7
10.44.7.29
128.59.1.3

For a system on Columbia campus, you probably want:

128.59.1.3
128.59.1.4
141.211.125.15

This list is CU's primary DNS server, their secondary DNS server, and a backup Columbia DNS server maintained at the University of Michigan.

For laptops at Nevis, do NOT put in specific DNS servers; let our DHCP servers supply them for you. This is because the IP addresses of some of our systems change if you switch between our wired and wireless networks.

If you have device that only connects via wireless that you carry outside CU or Nevis, you may want to consider using Google's DNS servers:

8.8.8.8
8.8.4.4

or OpenDNS

, which has a reputation for maintaining additional security features:

208.67.222.222
208.67.222.220

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