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Questions tagged [fqdn]

Fully Qualified Domain Name (FQDN)

Fully Qualified Domain Name (FQDN) is a domain name that specifies its exact location in the tree hierarchy of the Domain Name System (DNS). It specifies all domain levels, including the top-level domain and the root zone. A fully qualified domain name is distinguished by its unambiguity; it can only be interpreted one way.

Source: wikipedia

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Editing hosts file - will removing default settings cause trouble?

I'm running a CentOS 5.4 machine and had trouble getting sendmail to work. After a bunch of researching, I found out that I needed to change my servers FQDN. /etc/hosts had the following: 127.0.0.1 localhost localhost.localdomain xx.xx.xx.xx…
Arms
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What problems could I encounter by not using FQDN's in my closed network?

I'm setting up a closed network (i.e. no connections outside it) and I have been thinking of setting up servers and services without FQDN's because it would much more convenient to connect to a service that way. Services that will be offered as…
Marko Poutiainen
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550 Invalid HELO/EHLO must contain a FQDN or IPv6

I've got a Windows Server 2008 box where I host a number of websites (on different domains) that send email as part of their functionality. I've been checking up on the SMTP events and found a number of warnings that look like this: Message…
Charlino
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Can a Second-level domain be considered as a Fully-qualified domain?

I often see people talking about FQDNs (fully-qualified domains) to describe subdomains (e.g., networkengineering.stackexchange.com) that are under a second-level domain (e.g., stackexchange.com). I wonder if a SLD can be considered a FQDN itself.…
23r23f23q
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Active Directory authentication using format domain.fqdn\username

Assuming an Active Directory domain with FQDN "domain.local" and NetBIOS name "DOMAIN", there are two standard formats to identify user accounts: DOMAIN\username username@domain.local (The second one is called the "UserPrincipalName", or…
Massimo
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Is a subdomain essentially a host?

I'm trying to understand the difference between a subdomain and a domain in a LAN versus a WAN (Internet). (Or am I just fooling myself. Is it the same?) If I google it I just get that a subdomain is the beginning like x.domain.com where x is the…
bestprogrammerintheworld
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Postfix myhostname suggestion has trailing '.' Where is the bug? In dhclient, postfix or where?

After a minimal debian stretch installation using (debian-9.8.0-amd64-netinst.iso), where hostname is left at the default debian and domain was left empty, installing postfix fails because the detected fully qualified hostname contains a trailing .…
Peter V. Mørch
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Can I create a CSR without a Fully Qualified Domain Name?

My client has an Ubuntu server hosted by Digital Ocean. The server has no domain name, we access it via the public IP address. They want to start using https and provided me with a SSL certificate from GoDaddy.com. I need to provide GoDaddy with a…
JorgeZapatero
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Can a SSL certificate be used on a locally hosted website?

I tried to install Let's Encrypt on my local server. But I could not because it threw errors that I need a fully qualified domain name (FQDN). I use server.arch.local as my hostname. Does it not comply as a FQDN? Now I have started to wonder…
Just Khaithang
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How Can I Prevent Windows Server 2016/AD Installation from Adding TLDs Like .local to My Domain Name?

In a few days I have to reinstall a Windows Server 2016 Essentials instance on new hardware and would like to avoid an annoyance that cropped up in the initial install a few months back. To make a long story short, Microsoft’s software tacked a…
SQLServerSteve
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Assigning a hostname of the fqdn assigned to a dhcp client with dnsmasq?

I'm aware that you can assign static DNS entry names by doing the following in dnsmasq.conf: address=/wiki.leerdomain.lan/192.168.1.200 ptr-record=wiki.leerdomain.lan/192.168.1.200 and then assigning a static ip address using the mac address of the…
leeand00
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Puppet master with different hostname/fqdn

I'm trying to use a puppetmaster for servers being both on an LAN and outside of a LAN. Here's the setup : I have 3 servers behind a router and a VM on Google Cloud. The puppet agents connect to the master using the "puppet" hostname while the GCP…
J.F.Gratton
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Bypassing SSO property on oVirt 4.0

I have upgraded oVirt engine from 3.6 to 4.0, after the upgrade i could not access the webadmin portal, the welcome page displays this message: The client is not authorized to request an authorization. It's required to access the system using…
ahmedjaad
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Can't resolve DNS for RDWeb externally

I'm having trouble accessing RDWeb Access Server via internet browser using my FQDN (https://ifodgw.abacushub.io/rdweb) externally. I am able to access it externally using the elastic ip address 52.16.145.145, and internally using the FQDN. Pinging…
Aaron
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Checking if my hostname is correct (ovh vps + centos7)

I recently purchased a VPS from OVH with Centos 7 preinstalled. I want to make sure my hostname is correctly set. According to some tutorials: hostname returns the hostname hostname -f returns the FQDN After executing these commands, I got the…
AFA Med
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