A Request for Comments (RFC) is a publication of the Internet Engineering Task Force (IETF) and the Internet Society, the principal technical development and standards-setting bodies for the Internet.

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2
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3answers
2k views

Can a CNAME be a hostname

This is bit of a theological question, but nonetheless... So, a server has a hostname, let's say the fqdn is hostname.example.com (to be really precise about what I mean, this is the name that is set ...
14
votes
3answers
8k views

DNS using CNAMEs breaks MX records?

We are trying to move all our websites we host to CNAMES as we are planning on moving servers in the new year and would like the ability to move some clients to one server and other clients somewhere ...
0
votes
6answers
3k views

Can I ping 127.0.0.1 if my computer isn't connected to a network?

Does pinging 127.0.0.1 work on your machine if it's not on the network? Can these two machine be on the same network? machine A (192.168.173.11) machine B (192.168.163.11)
27
votes
3answers
32k views

What's the maximum URL length in Tomcat?

And is it configurable? Can I set up Tomcat so that a URL with, say, 200K of query params goes through successfully to the contained servlet? Yes, I know one should use POST when you have lots of ...
11
votes
7answers
3k views

Check public DNS health and RFC compliance

Every now and again I like to run checks on my DNS servers to make sure they are running right and to RFC spec. I used to use the DNSTools website to do this as it gave me a pretty good picture of ...
2
votes
2answers
423 views

Is RFC 1514 still relevant?

Is there any OS-agnostic standard these days better than RFC 1514?
0
votes
3answers
1k views

Is there any difference between prisoner.iana.org, blackhole-1.iana.org, and blackhole-2.iana.org?

Probably not the most useful question, but I'm curious: I understand (in theory) that if a reverse lookup for a private IP makes it makes it past your own DNS servers you should get back ...