Questions tagged [fqdn]

Fully Qualified Domain Name (FQDN)

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EAP Tunnels & WPA3 Certificate Requirement Changes with “Do not validate” and Windows NPS

There are changes afoot to certificate validation requirements from the Wi-Fi Alliance WPA3 standard (e.g. Do Not Validate is no longer an option). These are already being pushed out by Google for ...
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how can i block/ban an ip after a number of rejects on a mail server?

I found several attempts to use my email server as relay. The helo command was not coming from a FQDN and therefor the request got rejected. Is there a way to ban an IP address complelty after a ...
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FQDN hostname -f

Issue Details Working Server: root@hello:~# grep example.com /etc/hosts 127.0.1.1 hello.example.com hello root@hello:~# cat /etc/hostname hello root@0123:~# hostname -f hello.example.com Affected ...
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Setting Ubuntu hostname and hosts file with external domain for Postfix

I have a VPS with DigitalOcean and I also have a public domain registered with Namescheap. I have A and AAAA records in my Namescheap DNS settings pointing towards my VPS. I'm trying to setup Postfix ...
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Accessing servers through hostname now requires FQDN?

After upgrading to Linux Mint 20, the servers (pgsql databases and windows network share) on our internal network now require the fully qualified domain instead of just the machine name. For example, ...
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FQDN not persisting on reboot

I am trying to set up the hostname for my new Ubuntu 18.04 server using the following command: hostnamectl set-hostname foo.example.com And adding the following line to /etc/hosts 12.34.56.78 foo....
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522 views

In /etc/hosts file why would IPv4 hosts be different from IPv6 hosts?

Background: CentOS 8, Digital Ocean droplet. Question 1) I just looked at my hosts file in /etc/hosts and I noticed that hostnames listed under IPv4 and IPv6 are different. IPv4 lists example, ...
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451 views

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 ...
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2answers
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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 ...
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2answers
2k views

Can one have 2 Domains pointing to the same IP and / or 2 IP's resolving to the same Domain?

I am going to attempt to rewrite the initial question so that it makes more sense. The issue I was being faced with is that I have my Company's website hosted on Site Ground but unfortunately ...
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2 or more web servers share one static ip

I got 1 static Ip from my ISP. I got 2 NS (from NS provider)pointing my domain name towards my wan IP. My question: How do I get server1.domainname.td to reach server 1 inside my network, server2....
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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 ...
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1answer
1k views

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 ...
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1answer
350 views

Can I view my ssl FQDN? How do I fix the mismatch

I have probably set wrong FQDN while creating ssl certificate. Now, certificate is installed and site display a 'Warning: Potential Security Risk Ahead' I am quite sure it is FQDN as certificate was ...
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1answer
232 views

How to change the FQDN on a Lightsail instance?

I've spent the last number of hours trying to work out what's causing the error "hostname: Name or service not known" to be produced when I run the command "hostname -f" on the latest version of ...
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2answers
457 views

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 ...
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1answer
299 views

Configure bind9 zone records to ping/dig/nslookup/web browse using hostname only or fqdn

What is the proper way to configure a BIND9 zone file to allow ping/dig/nslookup/web browsers to query a host using its hostname or a shortened CNAME record that points to this hostname instead of the ...
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345 views

FQDN In the same server IIS for multi sites

I have an IIS 8 (win 2012 r2) server with multiples sites and ports: I would use FQDN to access to sites . for exemples : site1.lan : @IP_of_iis_server:9500 site2.lan : @IP_of_iis_server:2729 etc ...
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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 ...
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1answer
157 views

Our website is not resolving from our LAN because of LAN DNS configuration

We have a LAN/WAN network with a Windows domain name (ourcompanyweb.org) that matches our website url (http://ourcompanyweb.org) which is hosted externally. When I ping our website (of the same name) ...
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1answer
361 views

Postfix is appending myorigin to non-FQDNs despite “append_at_myorigin = no”

I have postfix and a local LMTP server running. In my main.cf, I have append_at_myorigin = no. When I run postconf|grep append_at_myorigin I get that this value is no. But for some reason, postfix is ...
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270 views

How do we configure an ALB with Elastic IP's to only resolve to our FQD

We have a situation where we have a website, www.mamapedia.com which is accessible both by the ALB address and the Elastic IP's assigned to the ALB at any given time. This is problematic and is ...
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438 views

Is it possible to add FQDN to Server behind NAT or to a NAT itself?

I have multiple identical servers behind a NAT. I use the same IP and just change up the port to move between the server via port forwarding.The issue is that i am using self-signed certificates and ...
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1answer
1k views

Cannot Set Up Naked Domain on Azure CDN

What I am using: Azure CDN: Premium Verizon DNS: DnsMadeEasy I am struggling to setup all endpoints of my domain on Azure CDN; I am able to set up endpoints with a prefix to my domain (i.e prefix....
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1answer
3k views

How do I properly configure a FQDN for sendmail to work with PHP mail()?

I'm sure variations on this question have been asked and I apologize if this is a duplicate, but I just can't seem to find something that works in my situation without breaking something else. I'm ...
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Require domain name and DNS should resolve proper host names on windows 2012

I have installed Siebel ip2017 on Google cloud free tier environment for self study however it is failing in configuration as it require FQDN( Require domain name and DNS should resolve proper host ...
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2answers
5k views

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 ...
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226 views

File Server - Hostname vs. FQDN

I have a problem with a File Server at Microsoft Windows Server 2008 R2 Operasion System. When my user browse a network share with FQDN she can't see the files, but if she browse it without FQDN (only ...
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1answer
739 views

What is the correct syntax declaring FQDN in host file for CentOS 7? [duplicate]

First, I know how to declare FQDN but, I just want to know are they the same thing: I have 2 VPSs running using Centos 7. When I look up at the /etc/hosts file: I found the entry of the host file for ...
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.bit domain on Nginx CentOS

At the moment I'm attempting to add domain.bit as my server_name in Nginx which I've done successfully, however, when forwarding the domain to the server IP or even pinging the domain it's failing to ...
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85 views

Service returning Kerberos error but only when using FQDN

I have an issue that was brought to me by another in our office. He is troubleshooting a service our software uses with customers environments that try's to make a connection to SQLServer2 by use of a ...
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2answers
492 views

Can you use a second level domain-name as a FQDN? (e.g. hostname.com)

I've been doing it for a while and it seems to work ok, but I thought I'd check what good practice is as far as FQDN. Right now my server is setup with (lets pretend) the hostname myhostname and I ...
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2answers
3k views

Why do I need an FQDN for a Hypervisor used only for running in house VMs for software testing?

I'm testing ProxMox, and during installation it asks for an FQDN. I've entered test.local, and it accepted it but I suppose I would have to enter something like cluster1.companyname.com, and then ...
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1answer
984 views

When do I actually need a FQDN?

I've been reading the guides on linode about setting up a server to host websites. One concept that bothers me most is FQDN. From what I've read, FQDN is very important and it MUST be set. In my ...
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1k views

Setting FQDN with external domain name

I have a Centos 7 server which has tens of domain names and IPs. The IP addresses are pointing to my server. Each domain name is pointing to its own IP via A record. I want to configure my FQDN in ...
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1answer
900 views

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 ...
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2answers
4k views

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 ...
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1answer
3k views

Powershell script to find and delete DNS records across multiple zones

We have multiple DNS zones, and what to find static DNS records that no longer respond to pings and delete them. I've written a PS script, but I'm having two problems. 1 - test-connection fails ...
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1answer
4k views

What's the difference between FQDNs and Hostnames [duplicate]

First of all, I wanna say that I know how DNS Servers work and also I know about the records in a DNS Zone File! I'm not an expert but I have some knowledge about them. I'm confused! why?! because I ...
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2answers
59 views

Exchange 2007 FQDN Issue

I am hoping to get a couple ideas regarding an issue we have come across. Exchange 2007 server was setup and has a FQDN of servername.domain.local which is obviously a local domain name. The server ...
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2answers
38k views

Why should I use an FQDN instead of the server's IP address?

In my work with servers I have come across in configuration files where you should enter the address to an external server. I have seen some use the server's IP address directly, but I have heard many ...
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1answer
2k views

net use fails with system error 67 with FQDN

I search for help with a confusing error with Windows 7 mounting a network fileshare. The problem is that on machine A a mount with the FQDN fails (net use system error 67) while the same command ...
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1answer
231 views

FQDN for server with various domians [closed]

I have a question regarding setting the FQDN on a server, well, technically, a vserver that serves a variety of domains. I have understood that the FQDN is a globally unique address that points to a ...
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1answer
236 views

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....
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1answer
151 views

5 seconds for hostname -f and a strange DNS request

My question addresses a strange behaviour of hostname -f on my Gentoo Linux System. The symptom: rt01 ~ # time hostname -f rt01.domain.net real 0m5.007s user 0m0.001s sys 0m0.000s With ...
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1answer
784 views

Fully Qualified Domain Name of VPS [duplicate]

I'm really confused by FQDN. So there is this file on my debian machine /etc/hosts. What exactly goes in there? Say my VPS is located at ipadress: 39.22.11.99 And i have a couple of domains all ...
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3answers
607 views

What hostname and rDNS should I choose?

What should I set as hostname and rDNS? 1 server 3 domains (domain1.com, domain2.net, domain3.de) 1 mail server for each domain My current settings: /etc/hosts 127.0.0.1 localhost 11.22.33.44 ...
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1answer
183 views

Not able to login through FQDN or IP address

I have kind of a weird situation here. I have a server running W2k8 R2 with SP1 where I am able to login with hostname\administrator but neither with IPAddress\Administrator nor with FQDN\...
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2answers
1k views

FQDN, DNS, Hosts, postfix

Let's say I bought this domain: example.com Name servers under DNS manager all points to example.com That subdomain(example.com) of nameservers points to an IP. Also, note that hostname unique is ...
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1answer
2k views

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 ...