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Questions tagged [reverse-dns]

Reverse DNS lookup is the determination of a domain name that is associated with a given IP address using the Domain Name System (DNS) of the Internet.

Reverse DNS lookup or reverse DNS resolution (rDNS) is the determination of a domain name that is associated with a given IP address using the Domain Name System (DNS) of the Internet.

Computer networks use the Domain Name System to determine the IP address associated with a domain name. This process is also known as forward DNS resolution. Reverse DNS lookup is the inverse process, the resolution of an IP address to its designated domain name.

Source: Wikipedia.

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Setup apache2 000-default.conf file as catchall

I am trying to setup the 000-default.conf vhost file on my apache2 server so that if anyone points their domain name to my servers ip address but the domain has no matching vhost file the server will load a default website located in /var/www/html…
Jayreis
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aws apache2 reverse dns on shared hosting server

I have a server on Amazon (Apache2/ubuntu server). I am using it to host a handful of websites. Although all the sites use gmail or other external mail providers to send and receive email I have mail setup on the server because I need the server to…
Jayreis
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How to deal with rDNS when my DNS is hosted by a third party that doesn't support PTR records?

I have NameCheap DNS for my DNS hosting and a fully unmanaged VPS server that it points to for all my domains. I'm going through and making sure everything is right and optimized, but my reverse DNS shows server.myhost.tld for some reason (I was…
MJHd
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Nginx reverse dns with cloudflare

https://www.nginx.com/resources/wiki/modules/rdns/ https://github.com/flant/nginx-http-rdns How do you get the nginx-http-rdns module to work with cloudflare free DDoS protection? I wish to use this module to verify search engine bots (issue #10 has…
masuking
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Reverse proxy for multiple paths to different paths on a single server

We have several clients who make it very difficult to launch landing pages on their websites - usually enterprise tech businesses with very strict access to their codebase and production site CMSs. Therefore I'm exploring the possibility of using…
C Ivemy
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how to modify zone file in AWS?

If a domain was purchased from a registrar A but the DNS settings for that registrar point to Amazon, where do I edit the zone file in AWS? Do I have to create a new Hosted Zone or edit a zone file inside the Linux EC2 instance? Where do I find the…
Ayrad
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Running your own email-server for multiple domains on single IP

I'm doing a little research on how you can run your own e-mail server for your domain. I know that you can use Zoho, or gmail, or any other alternative. However, I'm wondering if it's possible to do it on your own - especially for a non-busy…
Val Petruchek
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Can't connect to public cloud server via http/https in OVH

I'm new to OVH and trying to setup a site inside a public cloud server. I've got the server up and running and i can SSH into it, but can't get to port 80. (server has apache running and it can be accessed from inside the server). if i curl i get a…
Sudh33ra
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Configure Reverse DNS in Primary and Secondary BIND DNS Servers for same subnet

I have two DNS Servers (Let's say A and B). A configured as the primary/master for the domain example.com and B configured as the secondary/slave for the same domain. B configured as the primary/master for the domain my-domain.example.com and A…
Damith
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Reverse DNS PTR record

I have a dedicated server (Ubuntu 18.04 with virtualmin & webmin) which is hosting 7 WordPress sites on it. I have set up MX, DMARC, SPF and DKIM records for each one of them but dns tests online kept mentioning that I need to set up PTR records for…
AndrewL64
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MX record in a reverse zone

I am taking a DNS course on Linux Academy. In one of the lab, they define a reverse zone. In this zone they add MXs records. Does it make sense to have MX record defined in a reverse zone? Details: For this they do vim /etc/named.conf zone…
scoulomb
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How websites discover subdomains using only 'A' DNS records

Don't 'A' records only return IPv4 addresses? Why do some websites return subdomains? How do they find those subdomains? I mean, are they doing normal subdomain bruteforcing then resolve each subdomain's A record? Examples of those websites:…
Bumba
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DNS Forward Lookup is Failing in Linux

I am installing a two node RAC on my testbed (virtualbox), i have setup the DNS server, forward lookup is not working but reverse lookup is, PFB [root@dbwr1 log]# nslookup dbwr1.localdomain Server: 192.168.24.1 Address: 192.168.24.1#53 **…
user1747735
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How does reverse DNS add security?

There are plenty of good answers here about how reverse DNS works, but why is it used? It seems that all reverse DNS proves is that the person sending the email has access to the DNS records for the IP. For an end user on a residential connection I…
Origin
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| rDNS | IP gets resolved with a wrong hostname

I've been trying to set up rDNS so my IP could get resolved to my hostname in a program which has a built in rDNS lookup feature. I had done everything I was suggested (ask my ISP to make a PTR record for me, set up A & SRV records at my…
Henry
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