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Questions tagged [rfc]

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.

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.

107 questions
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Creating a RFC 1123 compliant date for HTTP header creation on the CLI

I'm trying to create a HTTP 1/1 compliant date header using standard unix date(1) in order to post this to a RESTful server using curl or similar. Any ideas what format to pass to date(1) to get this to be RFC 1123 compliant? Many thanks
Brad
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ICMP replies - ingress or egress interface (e.g. from a traceroute)

When a traceroute is initiated and receives an ICMP reply from the nodes, which interface should the be replying be from according to RFC 1812. they are actually replying from ingress (where they receive the packet) or egress (where the packet…
leviu
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Why does RFC 2181 disallow MX record with a CNAME exchange?

According to RFC 2181 https://www.rfc-editor.org/rfc/rfc2181#section-10.3 10.3. MX and NS records The domain name used as the value of a NS resource record, or part of the value of a MX resource record must not be an alias. Not only is the…
Rob Olmos
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IPv6 and AdvManagedFlag

RA messages have AdvManagedFlag. If this flag is ON then host "should use stateful autoconfiguration to obtain addresses" (RFC 2462). But RA messages are processing by the kernel. How do we know that this flag has came and host needs to run the…
someuser
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setting up subdomain in IIS/DNS - possible incorrect subdomain structure

I am trying to create a subdomain in DNS, however it doesn't appear to be working. I am getting the standard Unable to determine IP address from host name for aa.00.website.com The domain name does not exist. (the above is an indication of the…
kolin
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IPv6 and Hop Limit

I am reading RFC 2460 about IPv6 and it says that "the packet is discarded if Hop Limit is decremented to zero.", so that is to say that if a router decrements a packet's Hop Limit to 0, other another router can't receives a packet with a hop limit…
lilawood
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Is RFC 1514 still relevant?

Is there any OS-agnostic standard these days better than RFC 1514?
Todd Stout
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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 in /etc/sysconfig/network). The very same server…
rytis
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Master ipv4 CIDR configuration for private cluster in GCP

I'm trying to create a private cluster in GCP as per the steps mentioned here: https://cloud.google.com/kubernetes-engine/docs/how-to/private-clusters As per this, the ipv4 address for the master node is set to 172.16.0.32/28. I have also seen that…
Meghana B Srinath
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Is there any IETF / RFC standard defined for hosts file encoding?

While going through the accepted answer for hosts file ignored, how to troubleshoot?, I observed the statement "The hosts file should encoded in ANSI or UTF-8 without BOM". As I personally faced issues using an application due to hosts file in…
ramtech
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Which side of this SMTP conversation is correct?

I have an odd scenario with two mail servers communicating with one another and need help determining which one is behaving correctly. It's a little complicated to explain, so I think a SMTP conversation is probably the easiest way to describe it. …
Mike B
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Why IPs from the Private Address Space would be reachable through public network, and what customers can do about it?

Scenario: I have a customer running a Win7 Pro and an OpenVPN client; this workstation is used from one of their employees to send remote cmds to the (Windows) OpenVPN server, both using psexec and smb. What happend: Everything went fine for years,…
Marco
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Does a ccTLD/gTLD give out response from cache (or use cache)?

The question is exactly the same as the title says. Does the ccTLD/gTLD (and root servers come into the scenario automatically i presume) use cache? And what type of response it supplies? I know that they give pointers to the nameservers for the…
utlamn
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Debate with Microsoft on RFC 1918 when setting up a VPN to Azure

Microsoft has a technology called "point to site" VPN. (reference1, reference2) I have the following internal class "A" networks defined on premise: 10.2.0.0/16 10.4.0.0/16 10.40.0.0/16 10.20.0.0/16 I have the following Azure networks…
makerofthings7
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What is the format of the NAME field in the DNS answer section?

The NAME field is not detailed completely in RFC 1035 section 4.1.3. I want to understand this field (programmatically) for the ANSWER message type and I searched these resources (datasheet) for that. I have followed: IETF RFC…
Ephemeral
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